US4692387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintering of metal interlayers within organic polymeric films
Assignee: EIDP Inc
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Filing: 1986-06-12
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Granted: 1987-09-08
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Expires: 2006-06-12
Abstract
Abstract Process for modifying in situ the electrical and/or optical properties of an electrochemically-deposited interlayer within a polyimide film, the interlayer being comprised of particulate silver and/or gold, by heating the interlayer, either in its entirety or in a spatially selective manner, so as to sinter the particulate silver and/or gold without adversely affecting the properties of the polyimide, and the film structure produced thereby.
Inventors
- 👤 Shymon Reich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:55
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/02; B22F7/04; B22F10/00; B22F10/20; B22F10/28; C; C25; C25D; C25D5/00; C25D5/48; C25D5/50; C25D5/54; C25D5/56; B22F12/00; B22F12/40; B22F12/41; B22F12/43; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346; H05K3/00; H05K3/10; H05K3/105; H05K3/18; H05K3/188; H05K3/22; H05K3/28; H05K3/281; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12007; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
58 words
Process for modifying in situ the electrical and/or optical properties of an electrochemically-deposited interlayer within a polyimide film, the interlayer being comprised of particulate silver and/or gold, by heating the interlayer, either in its entirety or in a spatially selective manner, so as to sinter the particulate silver and/or gold without adversely affecting the properties of the polyimide.
Claim 2
Dependent Claim
58 words
Process for modifying in situ the electrical and/or optical properties of an electrochemically-deposited interlayer within a polyimide film, the interlayer being comprised of particulate silver and/or gold, by heating the interlayer, either in its entirety or in a spatially selective manner, so as to sinter the particulate silver and/or gold without adversely affecting the properties of the polyimide.
Claim 3
Dependent Claim
23 words
Process of claim 1 wherein the interlayer is heated in its entirety at a temperature of about 150° C. to about 450° C.
Claim 4
Dependent Claim
19 words
Process of claim 1 wherein the interlayer is heated in a spatially selective manner by means of a laser.
Claim 5
Dependent Claim
36 words
Process of claim 3 wherein the energy density output of the laser is about 0.1 to less than 1.0 Joule/cm 2 at a wavelength of 1 μm to 450 nm for 200 nanoseconds to 1 millisecond.
Claim 6
Dependent Claim
31 words
Process of claim 1 wherein the modification of electrical and/or optical properties provides an increase in electrical conductivity and optical reflectivity, either in the entire interlayer or in selected portions thereof.
Claim 7
Dependent Claim
17 words
Process of claim 5 wherein heating is continued until the electrical conductivity and optical reflectivity reach maxima.
Claim 8
Dependent Claim
33 words
Process of claim 6 wherein interlayer that has been heated to reach said maxima is heated further in selected portions so as to provide electrical conductivity and optical reflectivity less than the maxima.
Claim 9
Dependent Claim
52 words
Process of claim 1 wherein the film is a polyimide of 4,4'-oxydianiline and pyromellitic dianhydride, the metal is silver, the electrical conductivity of the interlayer is no greater than 6.5×10 2 (ohm cm) -1 , and the electrical conductivity of the sintered silver is at least 0.21×10 5 (ohm cm) -1 .
Claim 10
Dependent Claim
24 words
Process of claim 8 wherein the electrical conductivity of the sintered silver is at least 90% of the electrical conductivity of bulk silver metal.
Claim 11
Dependent Claim
51 words
Process of claim 1 wherein the film is a polyimide of 4,4'-oxydianiline and pyromellitic dianhydride, the metal is gold, the electrical conductivity of the interlayer is no greater than 24 (ohm cm) -1 , and the electrical conductivity of the sintered gold is at least 1.8×10 6 (ohm cm) -1 .
Claim 12
Dependent Claim
49 words
Film structure comprising an organic polymeric film within which is a sintered interlayer, the interlayer having been sintered in its entirety or in spatially-controlled portions from an unsintered interlayer, the unsintered interlayer having been formed in the film without any substantial change in the discrete dimensions of the film.
Claim 13
Dependent Claim
49 words
Film structure comprising an organic polymeric film within which is a sintered interlayer, the interlayer having been sintered in its entirety or in spatially-controlled portions from an unsintered interlayer, the unsintered interlayer having been formed in the film without any substantial change in the discrete dimensions of the film.
Claim 14
Dependent Claim
12 words
Film structure of claim 11 wherein there are a plurality of interlayers.
Claim 15
Dependent Claim
61 words
Film structure comprising an organic polymeric film within which is a sintered interlayer, the interlayer having been sintered in its entirety or in spatially-controlled portions from an unsintered interlayer, the unsintered interlayer having been formed in the film without any substantial change in the discrete dimensions of the film, the sintered interlayer having been produced by the process of claim 1.
Claim 16
Dependent Claim
29 words
Film structure of claim 13 wherein the sintered interlayer has been produced by heating the entire unsintered interlayer at a temperature of about 150° C. to about 450° C.
Claim 17
Dependent Claim
25 words
Film structure of claim 13 wherein the sintered interlayer has been produced by heating spatially-controlled portions of the unsintered interlayer by means of a laser.
Claim 18
Dependent Claim
21 words
Process of claim 2 wherein the interlayer is heated in its entirety at a temperature of 300° C. to 450° C.
Claim 19
Dependent Claim
59 words
Process for increasing in situ the electrical conductivity and/or the optical reflectivity of an interlayer within a polyimide film, the interlayer being comprised of particulate silver and/or gold, by heating the interlayer, either in its entirety or in a spatially selective manner, so as to sinter the particulate silver and/or gold without adversely affecting the properties of the polyimide.
Claim 20
Dependent Claim
59 words
Process for increasing in situ the electrical conductivity and/or the optical reflectivity of an interlayer within a polyimide film, the interlayer being comprised of particulate silver and/or gold, by heating the interlayer, either in its entirety or in a spatially selective manner, so as to sinter the particulate silver and/or gold without adversely affecting the properties of the polyimide.
Claim 21
Dependent Claim
47 words
Film structure comprising an organic polymeric film within which is a sintered interlayer, the interlayer having been sintered in its entirety or in spatially-controlled portions from an unsintered interlayer, the unsintered interlayer having been formed in the film without creating or destroying external surfaces of the film.
Claim 22
Dependent Claim
47 words
Film structure comprising an organic polymeric film within which is a sintered interlayer, the interlayer having been sintered in its entirety or in spatially-controlled portions from an unsintered interlayer, the unsintered interlayer having been formed in the film without creating or destroying external surfaces of the film.
Claim 23
Dependent Claim
59 words
Film structure comprising an organic polymeric film within which is a sintered interlayer, the interlayer having been sintered in its entirety or in spatially-controlled portions from an unsintered interlayer, the unsintered interlayer having been formed in the film without creating or destroying external surfaces of the film, the sintered interlayer having been produced by the process of claim 1.
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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) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |