Patent US4371598A successfully refreshed from Google Patents.
US4371598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for fabricating aligned patterns on the opposed surfaces of a transparent substrate
Assignee: Motorola Solutions Inc
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Filing: 1981-07-06
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Granted: 1983-02-01
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Expires: 2001-07-06
Abstract
Abstract A method is provided for fabricating substantially vertically aligned patterns of material on the opposed surfaces of a transparent substrate by employing a single external mask.
Inventors
- 👤 John W. Medernach
- 👤 Ivan A. Novak
- 👤 Harry D. Bush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:43
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/0073; H05K3/0082; G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/055; G02F1/0551; G03; G03F; G03F7/00; G03F7/20; G03F7/2022; G03F7/26; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0108; H05K2203/00; H05K2203/15; H05K2203/1572
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
166 words
A method for fabricating selected aligned metallic electrode patterns on the upper and lower surfaces of a substantially transparent substrate comprising the steps of: A. Situating an opaque metallic electrode material having a selected pattern on the upper surface of said substrate; B. Coating the lower surface of said substrate with photoresist; C. Exposing the upper surface of said substrate to collimated light so as to expose through said substrate the portions of the photoresist on the lower surface which remained unshielded by said opaque metallic electrode material on said upper surface; D. Removing the portions of the photoresist on said lower surface which was unexposed to light through the substrate; E. Coating said lower surface with a layer of selected metallic electrode material, and F. Removing the remaining portions of photoresist on said lower surface to form a selected pattern of selected metallic electrode material on said lower surface substantially vertically aligned with the selected pattern of opaque metallic electrode material on said upper surface.
Claim 2
Independent Claim
166 words
A method for fabricating selected aligned metallic electrode patterns on the upper and lower surfaces of a substantially transparent substrate comprising the steps of: A. Situating an opaque metallic electrode material having a selected pattern on the upper surface of said substrate; B. Coating the lower surface of said substrate with photoresist; C. Exposing the upper surface of said substrate to collimated light so as to expose through said substrate the portions of the photoresist on the lower surface which remained unshielded by said opaque metallic electrode material on said upper surface; D. Removing the portions of the photoresist on said lower surface which was unexposed to light through the substrate; E. Coating said lower surface with a layer of selected metallic electrode material, and F. Removing the remaining portions of photoresist on said lower surface to form a selected pattern of selected metallic electrode material on said lower surface substantially vertically aligned with the selected pattern of opaque metallic electrode material on said upper surface.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein in said step A a selected pattern of metallic electrode material is situated on the upper surface of a PLZT substrate.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein in said step B the lower surface of said substrate is coated with a negative working photoresist.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein in said step C the upper surface of said substrate is exposed to collimated ultraviolet light.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |