US3737986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosive bonding of workpieces
Assignee: AT&T Inc
•
Filing: 1971-11-26
•
Granted: 1973-06-12
•
Expires: 1991-11-26
Abstract
Abstract First workpieces, for example, beam-leaded integrated circuits, and the like, are bonded to second workpieces, for example, metallized ceramic substrates by first depositing a quantity of primary explosive, such as lead azide, onto each beam lead and then detonating the explosive to explosively bond the integrated circuits to the substrate. In another embodiment of the invention, the explosive bonding force is applied through a buffer sheet of plastic or metallic material which protects the surface of the substrate from contamination and which, in addition, dampens the shock of the explosion. In yet another embodiment of the invention, metal conductive paths are explosively bonded directly to a ceramic or glass substrate to form a ''''printed circuit pattern.'''' The same techniques are used to manufacture resistors, capacitors, inductors, etc.
Inventors
- 👤 B Cranston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:29
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0446; B; B23; B23K; B23K20/00; B23K20/06; B23K20/08; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/328; H05K3/38; H10W; H10W99/00; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K2201/00; H05K2201/10; H05K2201/10613; H05K2201/10621; H05K2201/10628; H05K2203/00; H05K2203/02; H05K2203/0271; H05K3/10; H05K3/20; H05K3/202; H10W72/00; H10W72/50; H10W72/551; H10W72/552; H10W72/5522; H10W72/5524; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49121; Y10T29/49124; Y10T29/4913; Y10T29/49144
Claims Analysis
Total Claims: 76
Claim 1
Independent Claim
24 words
The method according to claim 1 wherein said detonating step comprises: raising the temperature of said explosive material above the critical detonation temperature thereof.
Claim 2
Dependent Claim
37 words
The method according to claim 1 wherein said explosive material is photosensitive and said detonating step comprises: applying a beam of light to said photosensitive material of a wavelength and an intensity sufficient to induce explosion thereof.
Claim 3
Dependent Claim
29 words
The method according to claim 1 wherein said detonating step comprises: applying a beam of Alpha particles to said explosive material of an intensity sufficient to induce explosion thereof.
Claim 4
Dependent Claim
27 words
The method according to claim 1 wherein said detonating step comprises: passing an electrical discharge through said explosive material of an intensity sufficient to induce explosion thereof.
Claim 5
Dependent Claim
27 words
The method according to claim 1 wherein said detonating step comprises: directing an electron beam onto said explosive material of an intensity sufficient to induce explosion thereof.
Claim 6
Dependent Claim
40 words
The method according to claim 1 wherein said detonating step comprises: applying a beam of collimated, coherent radiation from an optical maser to said explosive material, said radiation being of a wavelength and an intensity sufficient to induce explosion thereof.
Claim 7
Dependent Claim
27 words
The method according to claim 1 wherein said detonating step comprises: applying a mechanical force to said explosive material of an intensity sufficient to induce explosion thereof.
Claim 8
Dependent Claim
27 words
The method according to claim 1 wherein said detonating step comprises: applying a shock wave to said explosive material of an intensity sufficient to induce explosion thereof.
Claim 9
Dependent Claim
32 words
The method according to claim 1 wherein said detonating step comprises: applying a beam of acoustical energy to said explosive material of a wavelength and an intensity sufficient to induce explosion thereof.
Claim 10
Dependent Claim
31 words
The method according to claim 1 wherein said detonating step comprises: applying an alternating magnetic field to said explosive material of a frequency and an intensity sufficient to induce explosion thereof.
Claim 11
Dependent Claim
31 words
The method according to claim 1 wherein said detonating step comprises: applying an alternating electric field to said explosive material of a frequency and an intensity sufficient to induce explosion thereof.
Claim 12
Dependent Claim
25 words
The method according to claim 1 wherein said detonating step comprises: introducing a chemical atmosphere to react with said explosive material and initiate explosion thereof.
Claim 13
Dependent Claim
35 words
The method according to claim 1 wherein an inhibitory chemical atmosphere is maintained about said beam lead-like device and said detonating step comprises: removing said inhibitory chemical atmosphere to initiate explosion of said explosive material.
Claim 14
Dependent Claim
47 words
The method according to claim 1 wherein said explosive material is a primary explosive and said placing step comprises: applying to at least one surface of each of the micro-leads to be bonded a mass of primary explosive which exceeds the critical mass of said primary explosive.
Claim 15
Dependent Claim
31 words
The method according to claim 1 comprising the further step of: maintaining a partial vacuum about said beam lead-like device and said workpiece, prior to the detonation of said explosive material.
Claim 16
Independent Claim
103 words
A method of bonding microleads of a beam lead-like device to respective predetermined regions of a frangible workpiece, said microleads each having a quantity of primary explosive material deposited thereon sufficient to create an explosive bond between each of said microleads and its respective predetermined region but insufficient to deleteriously damage said beam lead-like device or said workpiece, comprising the steps of: orienting said beam lead-like device with respect to said workpiece, thereby to place said microleads adjacent their respective predetermined Regions on the workpiece; and detonating said explosive material to explosively bond said microleads to said respective predetermined regions on the workpiece.
Claim 17
Dependent Claim
24 words
The method according to claim 17 wherein said detonating step comprises: raising the temperature of said explosive material above the critical detonation temperature thereof.
Claim 18
Dependent Claim
37 words
The method according to claim 17 wherein said explosive material is photosensitive and said detonating step comprises: applying a beam of light to said photosensitive material of a wavelength and an intensity sufficient to induce explosion thereof.
Claim 19
Dependent Claim
29 words
The method according to claim 17 wherein said detonating step comprises: applying a beam of Alpha particles to said explosive material of an intensity sufficient to induce explosion thereof.
Claim 20
Dependent Claim
27 words
The method according to claim 17 wherein said detonating step comprises: passing an electrical discharge through said explosive material of an intensity sufficient to induce explos1on thereof.
Claim 21
Dependent Claim
27 words
The method according to claim 17 wherein said detonating step comprises: directing an electron beam onto said explosive material of an intensity sufficient to induce explosion thereof.
Claim 22
Dependent Claim
40 words
The method according to claim 17 wherein said detonating step comprises: applying a beam of collimated, coherent radiation from an optical maser to said explosive material, said radiation being of a wavelength and an intensity sufficient to induce explosion thereof.
Claim 23
Dependent Claim
27 words
The method according to claim 17 wherein said detonating step comprises: applying a mechanical force to said explosive material of an intensity sufficient to induce explosion thereof.
Claim 24
Dependent Claim
27 words
The method according to claim 17 wherein said detonating step comprises: applying a shock wave to said explosive material of an intensity sufficient to induce explosion thereof.
Claim 25
Dependent Claim
32 words
The method according to claim 17 wherein said detonating step comprises: applying a beam of acoustical energy to said explosive material of a wavelength and an intensity sufficient to induce explosion thereof.
Claim 26
Dependent Claim
31 words
The method according to claim 17 wherein said detonating step comprises: applying an alternating magnetic field to said explosive material of a frequency and an intensity sufficient to induce explosion thereof.
Claim 27
Dependent Claim
31 words
The method according to claim 17 wherein said detonating step comprises: applying an alternating electric field to said explosive material of a frequency and an intensity sufficient to induce explosion thereof.
Claim 28
Dependent Claim
25 words
The method according to claim 17 wherein said detonating step comprises: introducing a chemical atmosphere to react with said explosive material and initiate explosion thereof.
Claim 29
Dependent Claim
35 words
The method according to claim 17 wherein an inhibitory chemical atmosphere is maintained about said beam lead-like device and said detonating step comprises: removing said inhibitory chemical atmosphere to initiate explosion of said explosive material.
Claim 30
Dependent Claim
33 words
The method according to claim 17 comprising the further step of: maintaining a partial vacuum about said at least one beam lead-like device and said workpiece prior to detonation of said explosive material.
Claim 31
Independent Claim
125 words
A method of bonding the microleads of at least one beam lead-like device to corresponding regions of a workpiece, comprising the steps of: aligning said at least one beam lead-like device with respect to said substrate; applying an apertured buffer member over said aligned beam lead-like device, said buffer member having a plurality of explosive charges deposited on the upper surface thereof corresponding in location to the microleads of said beam lead-like device; registering said buffer member with respect to said beam lead-like device so that said plurality of explosive charges are positioned over said microleads; and detonating said explosive charges to apply an explosive bonding force through the buffer member to said microleads to bond said microleads to the corresponding regions Of said workpiece.
Claim 32
Dependent Claim
32 words
The method according to claim 32 wherein said buffer member is transparent and said registering step comprises: optically aligning said explosive charges with respect to said microleads through the transparent buffer member.
Claim 33
Dependent Claim
24 words
The method according to claim 32 wherein said detonating step comprises: raising the temperature of said explosive material above the critical detonation temperature thereof.
Claim 34
Dependent Claim
37 words
The method according to claim 32 wherein said explosive material is photosensitive and said detonating step comprises: applying a beam of light to said photosensitive material of a wavelength and an intensity sufficient to induce explosion thereof.
Claim 35
Dependent Claim
29 words
The method according to claim 32 wherein said detonating step comprises: applying a beam of Alpha particles to said explosive material of an intensity sufficient to induce explosion thereof.
Claim 36
Dependent Claim
27 words
The method according to claim 32 wherein said detonating step comprises: passing an electrical discharge through said explosive material of an intensity sufficient to induce explosion thereof.
Claim 37
Dependent Claim
27 words
The method according to claim 32 wherein said detonating step comprises: directing an electron beam onto said explosive material of an intensity sufficient to induce explosion thereof.
Claim 38
Dependent Claim
40 words
The method according to claim 32 wherein said detonating step comprises: applying a beam of collimated, coherent radiation from an optical maser to said explosive material, said radiation being of a wavelength and an intensity sufficient to induce explosion thereof.
Claim 39
Dependent Claim
27 words
The method according to claim 32 wherein said detonating step comprises: applying a mechanical force to said explosive material of an intensity sufficient to induce explosion thereof.
Claim 40
Dependent Claim
27 words
The method according to claim 32 wherein said detonating step comprises: applying a shock wave to said explosive material of an intensity sufficient to induce explosion thereof.
Claim 41
Dependent Claim
32 words
The method according to claim 32 wherein said detonating step comprises: applying a beam of acoustical energy to said explosive material of a wavelength and an intensity sufficient to induce explosion thereof.
Claim 42
Dependent Claim
31 words
The method according to claim 32 wherein said detonating step comprises: applying an alternating magnetic field to said explosive material of a frequency and an intensity sufficient to induce explosion thereof.
Claim 43
Dependent Claim
31 words
The method according to claim 32 wherein said detonating step comprises: applying an alternating electric field to said explosive material of a frequency and an intensity sufficient to induce explosion thereof.
Claim 44
Dependent Claim
25 words
The method according to claim 32 wherein said detonating step comprises: introducing a chemical atmosphere to react with said explosive material and initiate explosion thereof.
Claim 45
Dependent Claim
35 words
The method according to claim 32 wherein an inhibitory chemical atmosphere is maintained about said beam lead-like device and said detonating step comprises: removing said inhibitory chemical atmosphere to initiate explosion of said explosive material.
Claim 46
Dependent Claim
34 words
The method according to claim 32 comprising the further step of: maintaining a partial vacuum about said at least one beam lead-like device and said workpiece, prior to the detonation of said explosive charges.
Claim 47
Independent Claim
138 words
A method of bonding microleads of a beam lead-like device to respective predetermined regions of a frangible workpiece, said microleads each having a quantity of photosensitive primary explosive material deposited thereon, comprising the steps of: orienting said beam lead-like device with respect to said workpiece so that said microleads are positioned over the respective predetermined regions of the workpiece to which they are to be bonded, placing said workpiece with the oriented beam lead-like device thereon within a chamber having at least one transparent portion, creating a partial vacuum within said chamber to exhaust unwanted by-products of the explosion, and applying light energy from At least one light source to said microleads through said at least one transparent portion of the chamber to detonate said photosensitive primary explosive material and bond said microleads to said respective predetermined regions.
Claim 48
Independent Claim
129 words
A method of bonding microleads of a beam lead-like device to respective predetermined regions of a frangible workpiece, said microleads each having a quantity of photosensitive primary explosive material deposited thereon, comprising the steps of: orienting said beam lead-like device with respect to said workpiece so that said microleads are positioned over the respective predetermined regions of the workpiece to which they are to be bonded, positioning said workpiece with said oriented device thereon proximate the exit port of an optical maser, energizing said optical maser to produce a beam of light, and passing said beam of light through a beam expander so that it impinges upon said microleads and detonates said photosensitive primary explosive material to explosively bond said microleads to the respective predetermined regions of said workpiece.
Claim 49
Dependent Claim
67 words
The method according to claim 49 comprising the further steps of, prior to said energizing step: placing said workpiece with said oriented device thereon within a chamber having at least one transparent portion, creating a partial vacuum within said chamber to exhaust unwanted by-products of the explosion, and then directing said expanded beam of light through said transparent portion of the chamber to impinge upon said microleads.
Claim 50
Independent Claim
116 words
A method of bonding microleads of a beam lead-like device to respective predetermined regions of a frangible workpiece, each of said workpieces having a quantity of primary explosive material deposited thereon, comprising the steps of: orienting said beam lead-like device with respect to said workpiece so that said microleads are positioned over the respective predetermined regions of the workpiece to which they are to be bonded, positioning said workpiece with said oriented device thereon proximate the focus of at least one focused radiant energy lamp, and energizing said lamp to apply focused radiant energy to said microleads to detonate said primary explosive material and explosively bond said microleads to the respective predetermined regions of said workpiece.
Claim 51
Dependent Claim
71 words
The method according to claim 51 comprising the further steps of, prior to said energizing step: placing said workpiece with said oriented device thereon within a chamber having at least one transparent portion, creating a partial vacuum within said chamber to exhaust unwanted by-products of the explosion, and directing the focused radiant energy from said at least one lamp through said transparent portion of the chamber to impinge upon said microleads.
Claim 52
Independent Claim
111 words
A method of bonding microleads of a beam lead-like device to respective predetermined regions of a frangible workpiece, each of said microleads having a quantity of primary explosive material deposited thereon, comprising the steps of: orienting said beam lead-like device with respect to said workpiece so that said microleads are positioned over the respective predetermined regions of the workpiece to which they are to be bonded, placing said workpiece with the oriented device thereon upon a thermally conducting susceptor, and heating said susceptor to raise the temperature of said primary explosive material above the critical detonation temperature thereof to explosively bond said microleads to the respective predetermined regions of said workpiece.
Claim 53
Dependent Claim
44 words
The method according to claim 53 comprising the further steps of, prior to said heating step: positioning said susceptor with the workpiece and oriented device thereon within a chamber, and creating a partial vacuum within said chamber to exhaust unwanted by-products of the explosion.
Claim 54
Independent Claim
120 words
A method of bonding microleads of a beam lead-like device to respective predetermined regionS of a frangible workpiece, each of said microleads having a quantity of primary explosive material deposited thereon, comprising the steps of: orienting said beam lead-like device with respect to said workpiece so that said microleads thereof are positioned over the respective predetermined regions of the workpiece to which they are to be bonded, placing said workpiece with said oriented device thereon within the coils of a radio frequency induction heater, and passing a radio frequency current through said coils to raise the temperature of said explosive material above the critical detonation temperature thereof to explosively bond said microleads to the respective predetermined regions of said workpiece.
Claim 55
Dependent Claim
34 words
The method according to claim 55 comprising the further step of, prior to said passing step: creating a partial vacuum about said workpiece and said oriented device to exhaust unwanted by-products of the explosion.
Claim 56
Independent Claim
123 words
A method of bonding microleads of a beam lead-like device to respective predetermined regions of a frangible workpiece, each of said microleads having a quantity of primary explosive material deposited thereon, comprising the steps of: orienting said beam lead-like device with respect to said workpiece so that said microleads are positioned over the respective predetermined regions of the workpiece to which they are to be bonded, placing said workpiece with said oriented device thereon between the plates of a radio frequency dielectric heater, and applying a radio frequency potential to the plates of said dielectric heater to raise the temperature of said explosive material above the critical detonation temperature thereof to explosively bond said microleads to the respective predetermined regions of said workpiece.
Claim 57
Dependent Claim
34 words
The method according to claim 57 comprising the further step of, prior to said applying step: creating a partial vacuum about said workpiece and said oriented device to exhaust unwanted by-products of the explosion.
Claim 58
Independent Claim
118 words
A method of bonding microleads of a beam lead-like device to respective predetermined regions of a frangible workpiece, each of said microleads having a quantity of primary explosive material deposited thereon, comprising the steps of: orienting said beam lead-like device with respect to said workpiece so that said microleads are positioned over the respective predetermined regions of the workpiece to which they are to be bonded, positioning said workpiece and the oriented device thereon proximate the exit port of an ultrasonic horn, and applying ultrasonic energy to the input port of said horn to apply ultrasonic energy to said microleads to detonate said explosive material and explosively bond said microleads to the respective predetermined regions of said workpiece.
Claim 59
Independent Claim
104 words
A method of bonding microleads of a beam lead-like device to respective predetermined regions of a frangible workpiece, each of said microleads having a quantity of primary explosive material deposited thereon, comprising the steps of: orienting said device with respect to said workpiece so that said microleads are positioned over the respective predetermined regions of the workpiece to which they are to be bonded, positioning a compliant member over said workpiece and said oriented device, and applying mechanical force through said compliant member to said microleads to detonate said explosive material and explosively bond said microleads to the respective predetermined regions of said workpiece.
Claim 60
Dependent Claim
34 words
The method according to claim 60 comprising the further step of, prior to said applying step: creating a partial vacuum about said workpiece and said oriented device to exhaust unwanted by-products of said explosion.
Claim 61
Independent Claim
137 words
A method of bonding microleads of a beam lead-like device to respective predetermined regions of a frangible workpiece, each of said microleads having a quantity of primary explosive material deposited thereon, comprising the steps of: orientinG said device with respect to said workpiece so that said microleads are positioned over the respective predetermined regions of the workpiece to which they are to be bonded, contacting at least one land area of said workpiece with a first electrical contact, contacting the explosive material on at least one microlead of said device with a second electrical contact, and applying an electrical potential to said first and second electrical contacts to create an electrical discharge through said explosive material to detonate said explosive material and explosively bond said at least one microlead to the respective predetermined region of said workpiece.
Claim 62
Dependent Claim
34 words
The method according to claim 62 comprising the further step of, prior to said applying step: creating a partial vacuum about said workpiece and said oriented device to exhaust unwanted by-products of the explosion.
Claim 63
Independent Claim
129 words
A method of bonding microleads of a beam lead-like device to respective predetermined regions of a frangible workpiece, each of said microleads having a quantity of primary explosive material deposited thereon, comprising the steps of: orienting said device with respect to said workpiece so that said microleads are positioned over the respective predetermined regions of the workpiece to which they are to be bonded, placing said workpiece and said oriented device within the vacuum chamber of an electron beam machine, exhausting said vacuum chamber, energizing the gun of said electron beam machine to produce a beam of electrons, and deflecting said electron beam to impinge upon all of said microleads to detonate the explosive material thereon and explosively bond said microleads to the respective predetermined regions of said workpiece.
Claim 64
Independent Claim
175 words
A method of bonding the microleads of at least one beam lead-like device to corresponding regions of a workpiece, comprising the steps of: aligning said device with respect to said workpiece so that the microleads thereof are positioned over the corresponding regions of the workpiece to which they are to be bonded; placing a buffer medium over said aligned device and said workpiece, said buffer medium having a plurality of photosensitive explosive charges deposited on the upper surface thereof; aligning said buffer medium with respect to said at least one device so that said plurality of explosive charges substantially overlay said microleads; placing said buffer medium, workpiece, and aligned device within a chamber having at least one transparent portion; creating a partial vacuum within said chamber to exhaust unwanted by-products of the explosion; and applying light energy from at least one light source to the upper surface of said buffer medium through said at least one transparent portion of the chamber to detonate said photosensitive explosive material and bond said microleads to said corresponding regions.
Claim 65
Independent Claim
172 words
A method of bonding the microleads of at least one beam lead-like device to corresponding regions of a workpiece, comprising the steps of: aligning said device with respect to said workpiece so that the microleads thereof are positioned over the corresponding regions of the workpiece to which they are to be bonded; placing a buffer medium over said aligned device and said workpiece, said buffer medium having a plurality of photosensitive explosive charges deposited on the upper surface thereof; aligning said buffer medium with respect to said at least one device so that said plurality of explosive charges substantially overlay said microleads; positioning said workpiece with said aligned device and said buffer medium thereon proximate the exit port of an optical maser; energizing said optical maser to produce a beam of light; and passing said beam of light through a beam expander so that it impinges upon the upper surface of said buffer medium and detonates said photosensitive explosive charges to explosively bond said microleads to the correspoNding regions of said workpiece.
Claim 66
Dependent Claim
72 words
The method according to claim 66, comprising the further steps of, prior to said energizing step: placing said workpiece with said aligned device and said buffer medium thereon within a chamber having at least one transparent portion, creating a partial vacuum within said chamber to exhaust unwanted by-products of the explosion, and then directing said expanded beam of light through said transparent portion of the chamber to impinge upon said buffer medium.
Claim 67
Independent Claim
155 words
A method of bonding the microleads of at least one beam lead-like device to corresponding regions of a workpiece, comprising the steps of: aligning said device with respect to said workpiece so that the microleads thereof are positioned over the corresponding regions of the workpiece to which they are to be bonded; placing a buffer medium over said aligned device and said workpiece, said buffer medium having a plurality of photosensitive explosive charges deposited on the upper surface thereof; aligning said buffer medium with respect to said at least one device so that said plurality of explosive charges substantially overlay said microleads; positioning said workpiece with said aligned device and said buffer medium thereon proximate the focus of at least one focused radiant energy lamp; and energizing said lamp to apply focused radiant energy to said buffer medium to detonate said explosive charges and explosively bond said microleads to the corresponding regions of said workpiece.
Claim 68
Dependent Claim
76 words
The method according to claim 68, comprising the further steps of, prior to said energizing step: placing said workpiece with said aligned device and said buffer medium thereon within a chamber having at least one transparent portion, creating a partial vacuum within said chamber to exhaust unwanted by-products of the explosion, and directing the focused radiant energy from said at least one lamp through said transparent portion of the chamber to impinge upon said buffer medium.
Claim 69
Independent Claim
149 words
A method of bonding the microleads of at least one beam lead-like device to corresponding regions of a workpiece, comprising the steps of: aligning said device with respect to said workpiece so that the microleads thereof are positioned over the corresponding regions of the workpiece to which they are to be bonded; placing a buffer medium over said aligned device and said workpiece, said buffer medium having a plurality of photosensitive explosive charges deposited on the upper surface thereof; aligning said buffer medium with respect to said at least one device so that said plurality of explosive charges substantially overlay said microleads; placing said workpiece with the aligned device and said buffer medium thereon upon a thermally conducting susceptor; and heating said susceptor to raise the temperature of said explosive charges above the critical detonation temperature thereof to explosively bond said microleads to the corresponding regions of said workpiece.
Claim 70
Dependent Claim
46 words
The method according to claim 70, comprising the further steps of, prior to said heating step: positioning said susceptor with the workpiece, aligned device, and buffer medium thereon within a chamber; and creating a partial vacuum within said chamber to exhaust unwanted by-products of the explosion.
Claim 71
Independent Claim
158 words
A method of bonding the microleads of at least one beam lead-like device to corresponding regions of a workpiece, comprising the steps of: aligning said device with respect to said workpiece so that the microleads thereof are positioned over the corresponding regions of the workpiece to which they are to be bonded; placing a buffer medium over said aligned device and said workpiece, said buffer medium having a plurality of photosensitive explosive charges deposited on the upper surface thereof; aligning said buffer medium with respect to said at least one device so that said plurality of explosive charges substantially overlay said mIcroleads; placing said workpiece with said aligned device and said buffer medium thereon within the coils of a radio frequency induction heater; and passing a radio frequency current through said coils to raise the temperature of said explosive charges above the critical detonation temperature thereof to explosively bond said microleads to the corresponding regions of said workpiece.
Claim 72
Dependent Claim
37 words
The method according to claim 72, comprising the further step of, prior to said passing step: creating a partial vacuum about said workpiece, said aligned device, and said buffer medium to exhaust unwanted by-products of the explosion.
Claim 73
Independent Claim
162 words
A method of bonding the microleads of at least one beam lead-like device to corresponding regions of a workpiece, comprising the steps of: aligning said device with respect to said workpiece so that the microleads thereof are positioned over the corresponding regions of the workpiece to which they are to be bonded; placing a buffer medium over said aligned device and said workpiece, said buffer medium having a plurality of photosensitive explosive charges deposited on the upper surface thereof; aligning said buffer medium with respect to said at least one device so that said plurality of explosive charges substantially overlay said microleads; placing said workpiece with said aligned device and said buffer medium thereon between the plates of a radio frequency dielectric heater; and applying a radio frequency potential to the plates of said dielectric heater to raise the temperature of said explosive charges above the critical detonation temperature thereof to explosively bond said microleads to the corresponding regions of said workpiece.
Claim 74
Dependent Claim
37 words
The method according to claim 74, comprising the further step of, prior to said applying step: creating a partial vacuum about said workpiece, said aligned device, and said buffer medium to exhaust unwanted by-products of the explosion.
Claim 75
Independent Claim
157 words
A method of bonding the microleads of at least one beam lead-like device to corresponding regions of a workpiece, comprising the steps of: aligning said device with respect to said workpiece so that the microleads thereof are positioned over the corresponding regions of the workpiece to which they are to be bonded; placing a buffer medium over said aligned device and said workpiece, said buffer medium having a plurality of photosensitive explosive charges deposited on the upper surface thereof; aligning said buffer medium with respect to said at least one device so that said plurality of explosive charges substantially overlay said microleads; positioning said workpiece with said aligned device and buffer medium thereon proximate the exit port of an ultrasonic horn; and applying ultrasonic energy to the input port of said horn to apply ultrasonic energy to said buffer medium to detonate said explosive charges and explosively bond said microleads to the corresponding regions of said workpiece.
Claim 76
Independent Claim
167 words
A method of bonding the microleads of at least one beam lead-like device to corresponding regions of a workpiece, comprising the steps of: aligning said device with respect to said workpiece so that the microleads thereof are positioned over the corresponding regions of the workpiece to which they are to be bonded; placing a buffer medium over said aligned device and said workpiece, said buffer medium having a plurality of photosensitive explosive charges deposited on the upper surface thereof; aligning said buffer medium with respect to said at least one device so that said plurality of explosive charges substantially overlay said microleads; placing said workpiece, said aligned device, and said buffer medium within the vacuum chamber of an electron beam machine; exhausting said vacuum chamber; energizing the gun of said electron beam machine to produce a beam of electrons; and deflecting said electron beam to impinge upon said buffer medium to detonate said explosive Charges and explosively bond said microleads to the correspondng regions of said workpiece.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |