US4551912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly integrated universal tape bonding
Assignee: International Business Machines Corp
•
Filing: 1985-04-01
•
Granted: 1985-11-12
•
Expires: 2005-04-01
Abstract
Abstract A method of forming semiconductor devices wherein a continuous metallic sheet is cut under computer control into a personalized lead pattern. The pattern is then moved to a bonding station. A bonding tool actuated by computer control moves from one terminal end to another to sequentially bond terminals to the semiconductor device. A variety of various patterns and chips can be handled on the same line using common cutting and bonding tools. A second bond can be made from the lead pattern to either a lead frame or a substrate.
Inventors
- 👤 Robert Marks
- 👤 Douglas W. Phelps, Jr.
- 👤 Sigvart J. Samuelsen
- 👤 William C. Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:18
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/071; H10W72/077; H10P; H10P72/00; H10P72/04; H10P72/0446; H10W72/701; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49121
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
232 words
A method of interconnecting semiconductor devices comprising: providing at least first and second semiconductor chips having no predefined sequence for bonding; providing a sheet of a material suitable for forming into metallic leads; moving said sheet of material to a cutting station having a cutting tool operable under control of a computer; cutting patterns having no predefined sequence in said sheet at said cutting station by directing movement of said cutting tool in response to control signals from said computer to trace one or more first patterns in said sheet that is personalized for said first semiconductor chip and subsequently moving said cutting tool under computer control to trace one or more second patterns in said sheet that is personalized for said second semiconductor chip and different from said first patterns such that said patterns are created on demand by said cutting section; moving said one or more first and second patterns in said material to a bonding station having a bonding tool operable under control of said computer; bonding at least one of said first patterns to said first semiconductor chip and bonding at least one of said second patterns to said second semiconductor chip at said bonding station under control of said computer to form a semiconductor chip assembly; whereby patterns personalized to respective semiconductor chips can be created and bonded utilizing a single set of cutting and bonding tools.
Claim 2
Independent Claim
232 words
A method of interconnecting semiconductor devices comprising: providing at least first and second semiconductor chips having no predefined sequence for bonding; providing a sheet of a material suitable for forming into metallic leads; moving said sheet of material to a cutting station having a cutting tool operable under control of a computer; cutting patterns having no predefined sequence in said sheet at said cutting station by directing movement of said cutting tool in response to control signals from said computer to trace one or more first patterns in said sheet that is personalized for said first semiconductor chip and subsequently moving said cutting tool under computer control to trace one or more second patterns in said sheet that is personalized for said second semiconductor chip and different from said first patterns such that said patterns are created on demand by said cutting section; moving said one or more first and second patterns in said material to a bonding station having a bonding tool operable under control of said computer; bonding at least one of said first patterns to said first semiconductor chip and bonding at least one of said second patterns to said second semiconductor chip at said bonding station under control of said computer to form a semiconductor chip assembly; whereby patterns personalized to respective semiconductor chips can be created and bonded utilizing a single set of cutting and bonding tools.
Claim 3
Dependent Claim
22 words
The method of claim 1 further comprising the step of separating said pattern bonded to said semi-conductor chip assembly from said sheet.
Claim 4
Dependent Claim
56 words
The method of claim 1, wherein the step of bonding further comprises the steps of placing said first semiconductor chip and said pattern on a lead frame, positioning said lead frame into alignment with a terminal portion of said pattern unique to said lead frame and, bonding said terminal portion to leads of said lead frame.
Claim 5
Dependent Claim
51 words
The method of claim 1, wherein the step of bonding further comprises the steps of placing a substrate under said semiconductor chip and said pattern, positioning said substrate into alignment with a terminal portion of said pattern unique to said substrate and, bonding said terminal portion to contacts on said substrate.
Claim 6
Dependent Claim
41 words
The method of claim 1, wherein said semiconductor chip has a series of terminals, and the step of bonding comprises moving said bonding tool from one terminal to another to consecutively bond said pattern to said terminals without tracing said pattern.
Claim 7
Dependent Claim
45 words
The method of claim 1, wherein the step of bonding comprising moving said bonding tool under computer control to bond said first pattern to said first chip and subsequently moving said bonding tool under computer control to bond said second pattern to said second chip.
Claim 8
Dependent Claim
13 words
The method of claim 1, wherein said cutting tool is a laser cutter.
Claim 9
Dependent Claim
13 words
The method of claim 1, wherein said bonding tool is an ultrasonic probe.
Claim 10
Dependent Claim
12 words
The method of claim 1, wherein said sheet material is aluminum foil.
Claim 11
Dependent Claim
34 words
The method of claim 1, wherein said sheet material is a clad foil having a metal inlay on one side for bonding to said chip and a terminal strip on the opposite side thereof.
Claim 12
Dependent Claim
30 words
The method of claim 1, wherein said sheet is supplied from a continuous roll further comprising the step of segmenting said sheet prior to bonding said pattern to said chip.
Claim 13
Dependent Claim
18 words
The method of claim 1, further comprising the steps of storing said semiconductor chip assembly on said sheet.
References Cited (Backward Citations)
US3698075A
Cited
US3709424A
Cited
US3793714A
Cited
US3761675A
Cited
US3903363A
Cited
US4209355A
Cited
JPS56118345A
Cited
US4396457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |