Patent US4372809A successfully refreshed from Google Patents.
US4372809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing solderable, temperable, thin film tracks which do not contain precious metal
Assignee: Siemens AG
•
Filing: 1982-02-05
•
Granted: 1983-02-08
•
Expires: 2002-02-05
Abstract
Abstract A method for manufacturing solderable, temperable thin film tracks which do not contain precious metal on an electrically non-conductive substrate serving as a carrier employs the steps of applying an adhesive or resistance layer to the substrate, which serves as an intermediate layer, applying a conductive layer over the intermediate layer, and applying a protective anti-corrosion layer over the conductive layer. The protective layer may consist of aluminum or an aluminum alloy, or may be comprised of a combination of a layer of aluminum and a layer of chrome. An aluminum layer may also be applied between the intermediate layer and the conductive layer.
Inventors
- 👤 Virinder Grewal
- 👤 Werner Reindl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:44
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/22; H05K3/24; H05K3/244; H10; H10D; H10D86/00; H10D86/80; H10D86/85
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
A method for manufacturing solderable and temperable thin film conductor tracks with no precious metal on an electrically non-conducting substrate comprising the steps of: applying a resistance layer to said substrate; applying an adhesive layer over said resistance layer; applying a conductive layer consisting of copper over said adhesive layer; and applying an anti-oxidation and anti-corrosion layer consisting of aluminum or an aluminum alloy in vacuum to said adhesive layer and to said conductive layer.
Claim 2
Independent Claim
75 words
A method for manufacturing solderable and temperable thin film conductor tracks with no precious metal on an electrically non-conducting substrate comprising the steps of: applying a resistance layer to said substrate; applying an adhesive layer over said resistance layer; applying a conductive layer consisting of copper over said adhesive layer; and applying an anti-oxidation and anti-corrosion layer consisting of aluminum or an aluminum alloy in vacuum to said adhesive layer and to said conductive layer.
Claim 3
Dependent Claim
44 words
The method of claim 1 wherein a single layer is applied to said substrate simultaneously serving as said resistance layer and said adhesive layer consisting of a material selected from the group consisting of nickel chrome, tantalium nitride, tantalium aluminum and tin indium oxide.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein said conductor layer consists of a copper nickel alloy.
Claim 5
Dependent Claim
58 words
The method of claim 1 wherein the step of applying said anti-oxidation and anti-corrosion layer is further defined by the steps of applying a layer of chrome over said conductive layer and applying a layer of aluminum over said layer of chrome, said aluminum layer and said chrome layer acting in combination as said anti-oxidation and anti-corrosion layer.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein said layers are applied in a vacuum by means of vapor deposition.
Claim 7
Dependent Claim
18 words
The method of claim 1 wherein said layers are applied in a vacuum by means of sputter deposition.
Claim 8
Dependent Claim
39 words
The method of claim 1 wherein said resistance layer, said adhesive layer, and said conductive layer are applied in a first vacuum process and wherein said protective layer is applied to said conductive layer in a separate vacuum process.
Claim 9
Dependent Claim
34 words
The method of claim 1 comprising the additional step of tempering said thin film conductor tracks and removing said anti-oxidation and anti-corrosion layer at selected locations by etching for subsequent soldering at said locations.
References Cited (Backward Citations)
US3881884A
Cited
US4132813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |