Patent US4011556A successfully refreshed from Google Patents.
US3607148A
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Solder preforms on a semiconductor wafer
Assignee: Motorola Solutions Inc
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Filing: 1969-07-23
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Granted: 1971-09-21
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Expires: 1989-07-23
Abstract
Abstract A semiconductor wafer having a plurality of gold solder preforms attached to one surface thereof. The gold solder preforms are attached to an area of the wafer which is in registration with and wholly within the area defined by the scribe lines areas located on the opposite surface.
Inventors
- 👤 Robert S Foote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:25
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/20; B; B23; B23K; B23K35/00; B23K35/02; B23K35/0222; H10P; H10P95/00; H10W72/01; H10W72/013; H10W72/071; H10W72/073; H10W72/07331; H10W72/07336; H10W72/07351; H10W72/07352; H10W72/251; H10W72/30; H10W72/321; H10W72/90; H10W72/951; H10W72/952; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12188; Y10T428/12389; Y10T428/12396; Y10T428/12493; Y10T428/12528; Y10T428/12639; Y10T428/12646; Y10T428/12771; Y10T428/12861; Y10T428/12889
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
22 words
A semiconductor wafer as described in claim 1 wherein the thickness of said gold preform is about 100 to 400 microinches thick.
Claim 2
Dependent Claim
22 words
A semiconductor wafer as described in claim 1 wherein the thickness of said gold preform is about 200 to 250 microinches thick.
Claim 3
Dependent Claim
26 words
A semiconductor wafer as described in claim 1 wherein said gold preforms are separated from each other by a distance of about 6 to 8 mils.
Claim 4
Dependent Claim
25 words
A semiconductor wafer as described in claim 1 wherein said adjacent gold preforms are separated from each other by a distance of about 7 mils.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |