Patent US3735484A successfully refreshed from Google Patents.
US3735484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-corrosive coating for thin aluminum metallization
Assignee: Motorola Solutions Inc
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Filing: 1970-12-17
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Granted: 1973-05-29
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Expires: 1990-12-17
Abstract
Abstract To prevent corrosion of aluminum metallization of semiconductor devices, the device, including the aluminum metallization thereof is phosphated with a phosphate solution that includes no sodium. The phosphating may take place before the leads are provided or after. Portions of the phosphated surface may be covered by deposited glass. Then the phosphated semiconductor device or IC may be encapsulated in a plastic material in a known manner.
Inventors
- 👤 H Gurev
- 👤 R Kirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:43
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/14; C23G1/22; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/34; C23C22/37; C23C22/38; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S438/00; Y10S438/906
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
13 words
The method of claim 1 in which said bonding is by thermal compression.
Claim 2
Dependent Claim
11 words
The method of claim 1 in which said bonding is ultrasonic.
Claim 3
Dependent Claim
38 words
The method of claim 1 and further including the step of covering the phosphated device with an insulating coating, etching holes through said coating and making at least one electrical connection to said phosphated device through a hole.
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |