US3928658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of providing transparent conductive electrodes on a transparent insulating support
Assignee: US Philips Corp
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Filing: 1973-04-25
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Granted: 1975-12-23
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Expires: 1993-04-25
Abstract
Abstract A method of providing patterns of transparent conductors for displays, with solderable contact pads which consist of layers of different materials. A metal auxiliary layer is used in which a negative reproduction of the desired pattern of conductors and pads is provided. After providing the conductive layers necessary for the pattern, the excessive parts thereof are removed by the selective dissolution of the metal auxiliary layer. The method is of particular importance when patterns of conductors are used having one or more materials which cannot be etched or can be etched with difficulty only.
Inventors
- 👤 Boxtel Antonius Marinus Van
- 👤 Cornelis Jan Gerritsma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:04
CPC Classifications
H; H10; H10W; H10W20/00; H10W20/01; H10W20/031; H10W20/069; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1345; H05; H05K; H05K3/00; H05K3/22; H05K3/24; H10P; H10P95/00; H10W20/056; H10W20/058; H10W20/40; H10W20/41; H10W20/425; H10W20/44; H10W20/4403; H10W20/4432; H10W20/482; H10W20/484; H10W70/00; H10W70/01; H10W70/05; H10W70/60; H10W70/62; H10W70/66; C; C09; C09K; C09K2323/00; C09K2323/04; H05K2201/00; H05K2201/03; H05K2201/032; H05K2201/0326; Y; Y10; Y10S; Y10S438/00; Y10S438/942; Y10S438/944; Y10S438/948; Y10S438/951; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49156; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
141 words
A METHOD OF PRODUCING A DEVICE COMPRISING A TRANSPARENT INSULATING SUPPORT WHICH IS PROVIDED WITH A PATTERN OF CONDUCTORS OF A TRANSPARENT CONDUCTIVE MATERIAL COMPRISING THE STEPS OF: A. FORMING N SAID SUPPORT AUXILIARY LAYER COMPRISING A METAL LAYER CONTAINING AT LEAST ONE RECESS CORRESPONDING TO SAID PATTERN OF CONDUCTORS; B. FORMING A TRANSPARENT CONDUTIVE LAYER ON SAID AUILIARY LAYER AND IN EACH SAID RECESS; C. FORMING A SOLDERABLE METAL LAYER ON A PART OF THE EXPOSED SURFACE OF SAID TRANSPARENT CONDUCTIVE LAYER; AND D. SELECTIVELY DISSOLVING SAID AUXILIARY LAYER SO AS TO REMOVE SAID AUXILIARY LAYER AND THE PORTION OF SAID CONCONDUCTIVE LAYER OVERLYING SAID AUXILIARY LAYER, SAID CONDUCTOR PATTERN COMPRISING A FIRST PART HAVING ONLY A TRANSPARENT LAYER AND A SECOND PART HAVING MULTIPLE LAYERS COMPRISING BOTH AT LEAST ONE LOWERMOST, SUPPORT-ADJOINING TRANSPARENT LAYER AND ONE SOLDERABLE LAYER THEREABOVE.
Claim 2
Independent Claim
141 words
A METHOD OF PRODUCING A DEVICE COMPRISING A TRANSPARENT INSULATING SUPPORT WHICH IS PROVIDED WITH A PATTERN OF CONDUCTORS OF A TRANSPARENT CONDUCTIVE MATERIAL COMPRISING THE STEPS OF: A. FORMING N SAID SUPPORT AUXILIARY LAYER COMPRISING A METAL LAYER CONTAINING AT LEAST ONE RECESS CORRESPONDING TO SAID PATTERN OF CONDUCTORS; B. FORMING A TRANSPARENT CONDUTIVE LAYER ON SAID AUILIARY LAYER AND IN EACH SAID RECESS; C. FORMING A SOLDERABLE METAL LAYER ON A PART OF THE EXPOSED SURFACE OF SAID TRANSPARENT CONDUCTIVE LAYER; AND D. SELECTIVELY DISSOLVING SAID AUXILIARY LAYER SO AS TO REMOVE SAID AUXILIARY LAYER AND THE PORTION OF SAID CONCONDUCTIVE LAYER OVERLYING SAID AUXILIARY LAYER, SAID CONDUCTOR PATTERN COMPRISING A FIRST PART HAVING ONLY A TRANSPARENT LAYER AND A SECOND PART HAVING MULTIPLE LAYERS COMPRISING BOTH AT LEAST ONE LOWERMOST, SUPPORT-ADJOINING TRANSPARENT LAYER AND ONE SOLDERABLE LAYER THEREABOVE.
Claim 3
Dependent Claim
25 words
A method as in claim 1, wherein said auxiliary layer has a thickness which is at least equal to the thickness of said conductive layer.
Claim 4
Dependent Claim
25 words
A method as in claim 1, wherein said auxiliary layer consists essentially of a member selected from the group of aluminum, copper, silver, and magnesium.
Claim 5
Dependent Claim
27 words
A method as in claim 1, wherein said transparent conductive layer consists essentially of a member from the group of tin oxide, indium oxide and copper iodide.
Claim 6
Dependent Claim
30 words
A method as in claim 1, wherein said solderable layer consists essentiallY of nickel and a nickel-chromium layer is provided between said transparent conductive layer and said nickel solderable layer.
Claim 7
Dependent Claim
30 words
A method as in claim 1, wherein said solderable layer consists essentially of gold and a chromium layer is provided between said transparent conductive layer and said gold solderable layer.
Claim 8
Dependent Claim
59 words
A method as in claim 6, wherein said transparent electrically conductive layer uses a thickness between 0.05 and 0.15 microns and said multiple layer further comprises a chromium layer having thickness between 0.01 and 0.1 microns disposed on said transparent conductive layer and a gold layer having a thickness between 0.01 and 0.1 microns disposed on said chromium layer.
Claim 9
Dependent Claim
18 words
A method as in claim 1, wherein said auxiliary layer is covered only partly by said multiple layers.
Claim 10
Dependent Claim
23 words
A method as in claim 1, wherein said auxiliary layer consists essentially of aluminum and said auxiliary layer is subsequently etched with lye.
Claim 11
Dependent Claim
23 words
A method as in claim 9, wherein said auxiliary layer consists essentially of aluminum and has a thickness between 0.1 and 1 microns.
Claim 12
Dependent Claim
21 words
A method as in claim 9, wherein said aluminum auxiliary layer is etched with a solution containing lye and hydrogen peroxide.
Claim 13
Dependent Claim
59 words
A method as in claim 9, wherein said transparent conductive layer has a thickness between 0.05 and 0.15 microns and said multiple layer further comprises a nickel-chromium layer having a thickness of at most 0.3 microns disposed on said transparent conductive layer and a nickel layer having a thickness between 0.15 and 0.35 microns disposed on said nickel-chromium layer.
Claim 14
Dependent Claim
16 words
A device comprising a pattern of conductors, produced according to the method defined in claim 1.
References Cited (Backward Citations)
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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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |