Patent US2958633A successfully refreshed from Google Patents.
US2958633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of semi-conductor devices
Assignee: International Standard Electric Corp
•
Filing: 1958-02-11
•
Granted: 1960-11-01
•
Expires: 1978-02-11
Abstract
No abstract record available.
Inventors
- 👤 Claussen Brian Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:04
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/313; C; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/12; C25D; C25D7/00; C25D7/12; C25F; C25F3/00; C25F3/02; C25F3/12; H10; H10D; H10D99/00; H10P; H10P10/00; H10P14/00; H10P14/40; H10P14/46; H10P14/47; H10P50/00; H10P50/60; H10P50/61; H10P50/613; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF CLEANING AND PLATING THE SURFACE OF A SEMI-CONDUCTOR WHICH CONSISTS OF IMMERSING BOTH THE SEMI-CONDUCTOR AND AN ELECTRODE OF PLATING METAL INTO A NON-AQUEOUS SOLUTION CONSISTING OF A SATURATED SOLUTION OF COPPER CHLORIDE IN FORMAMIDE, WHICH SOLUTION IS DEVOID OF OXYGEN AND OF HIGH DIELECTRIC CONSTANT, CLEANING THE SURFACE BY PASSING AN ELECTRIC CURRENT BETWEEN THE METAL ELECTRODE AND THE SEMI-CONDUCTOR IN ONE DIRECTION TO ETCH THE SEMI-CONDUCTOR SURFACE AND PLATING THE CLEANED SURFACE BY PASSING CURRENT IN THE OPPOSITE DIRECTION TO PLATE THE ETCHED SURFACE.
Claim 2
Independent Claim
89 words
A METHOD OF CLEANING AND PLATING THE SURFACE OF A SEMI-CONDUCTOR WHICH CONSISTS OF IMMERSING BOTH THE SEMI-CONDUCTOR AND AN ELECTRODE OF PLATING METAL INTO A NON-AQUEOUS SOLUTION CONSISTING OF A SATURATED SOLUTION OF COPPER CHLORIDE IN FORMAMIDE, WHICH SOLUTION IS DEVOID OF OXYGEN AND OF HIGH DIELECTRIC CONSTANT, CLEANING THE SURFACE BY PASSING AN ELECTRIC CURRENT BETWEEN THE METAL ELECTRODE AND THE SEMI-CONDUCTOR IN ONE DIRECTION TO ETCH THE SEMI-CONDUCTOR SURFACE AND PLATING THE CLEANED SURFACE BY PASSING CURRENT IN THE OPPOSITE DIRECTION TO PLATE THE ETCHED SURFACE.
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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |