Patent US4555285A successfully refreshed from Google Patents.
US4555285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming patterns in metallic or ceramic substrates
Assignee: International Business Machines Corp
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Filing: 1983-12-14
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Granted: 1985-11-26
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Expires: 2003-12-14
Abstract
Abstract A method for forming a pattern in a metallic and/or ceramic substrate by laminating together the substrate which is in the green stage and a composite of a photosensitive material and a backing wherein the photosensitive material has been developed into the desired pattern, and then subjecting the substrate to elevated temperatures in order to cause sintering of the substrate and removal of the photosensitive material, thereby resulting in embedding of the pattern into the sintered substrate.
Inventors
- 👤 Dudley A. Chance
- 👤 Timothy C. Reiley
- 👤 Michael Sampogna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:24
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/0011; H05K3/0017; H10; H10W; H10W70/00; H10W70/01; H10W70/05; H05K1/00; H05K1/02; H05K1/0272; H05K1/03; H05K1/0306; H05K2201/00; H05K2201/09; H05K2201/09009; H05K2201/09036; H05K2203/00; H05K2203/05; H05K2203/0562; H05K2203/0582; H05K2203/12; H05K2203/128; H05K3/10; H05K3/107; H05K3/46; H05K3/4611; H05K3/4626; H05K3/4629
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
145 words
A method for forming a pattern in a metallic or ceramic substrate which comprises: (a) providing a composite of a layer of photosensitive material on a backing; (b) exposing said layer of photosensitive material to actinic radiation in a predetermined pattern; (c) developing said layer of photosensitive material to leave the predetermined pattern on said backing; (d) then laminating together said composite and a substrate in the green stage containing metallic particles or ceramic particles or combinations thereof with the developed photosensitive side of the composite confronting the surface of said substrate, thereby embedding the predetermined patterns of photosensitive material into said substrate in said green stage; and (e) subjecting the substrate to elevated temperature sufficient to cause sintering of the particles in said substrate and removal of the photosensitive material, thereby resulting in embedding the said pattern into the sintered metallic or ceramic substrate.
Claim 2
Independent Claim
145 words
A method for forming a pattern in a metallic or ceramic substrate which comprises: (a) providing a composite of a layer of photosensitive material on a backing; (b) exposing said layer of photosensitive material to actinic radiation in a predetermined pattern; (c) developing said layer of photosensitive material to leave the predetermined pattern on said backing; (d) then laminating together said composite and a substrate in the green stage containing metallic particles or ceramic particles or combinations thereof with the developed photosensitive side of the composite confronting the surface of said substrate, thereby embedding the predetermined patterns of photosensitive material into said substrate in said green stage; and (e) subjecting the substrate to elevated temperature sufficient to cause sintering of the particles in said substrate and removal of the photosensitive material, thereby resulting in embedding the said pattern into the sintered metallic or ceramic substrate.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein said substrate contains ceramic particles.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein the substrate contains a plurality of layers and each layer is about 4 to about 15 mils thick.
Claim 5
Dependent Claim
24 words
The method of claim 1 wherein the pattern includes lines with at least one of the width or length being 2 mils or less.
Claim 6
Dependent Claim
24 words
The method of claim 1 wherein the pattern includes lines with at least one of the width or length being 1 mil or less.
Claim 7
Dependent Claim
15 words
The method of claim 4 wherein said pattern includes fan-out lines in multilayer ceramic substrate.
Claim 8
Dependent Claim
15 words
The method of claim 4 wherein said pattern includes fan-out lines on multilayer ceramic substrate.
Claim 9
Dependent Claim
18 words
The method of claim 4 which includes lines and interconnecting vias within and on the multilayer ceramic substrate.
Claim 10
Dependent Claim
19 words
The method of claim 1 wherein said substrate in the green stage includes vias filled with a fugitive paste.
Claim 11
Dependent Claim
15 words
The method of claim 4 which is directed to providing dielectric isolation for print heads.
Claim 12
Dependent Claim
19 words
The method of claim 1 wherein the thickness of said photosensitive layer is about 0.5 to about 3 mils.
Claim 13
Dependent Claim
10 words
The method of claim 1 wherein said backing is transparent.
Claim 14
Dependent Claim
11 words
The method of claim 1 wherein said backing contains polyethylene terephthalate.
Claim 15
Dependent Claim
14 words
The method of claim 1 which further includes providing conductive material in said pattern.
Claim 16
Dependent Claim
19 words
The method of claim 14 which includes providing said conductive material in said pattern by impregnation with molten metal.
Claim 17
Dependent Claim
30 words
The method of claim 1 wherein said laminating is achieved at pressures of about 100 to about 3000 psi and temperatures of about normal room temperature to about 100° C.
Claim 18
Dependent Claim
24 words
The method of claim 1 wherein said laminating is achieved at a pressure of about 1500 psi at 75° C. for about 5 minutes.
Claim 19
Dependent Claim
15 words
The method of claim 1 wherein said elevated temperature is about 900° to 1600° C.
Claim 20
Dependent Claim
28 words
The method of claim 1 wherein said substrate in said green stage contains a thermally-fugitive bonding material for bonding by metallic particles, or ceramic particles, or combinations thereof.
Claim 21
Dependent Claim
30 words
The method of claim 19 wherein bonding material is an organic binder and said substrate in the green stage contains about 8% to about 25% by weight of said binder.
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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) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |