US2945285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonding of semiconductor contact electrodes
Assignee: Unisys Corp
•
Filing: 1957-06-03
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Granted: 1960-07-19
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Expires: 1977-06-03
Abstract
No abstract record available.
Inventors
- 👤 Jacobs Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:22
CPC Classifications
H; H10; H10W; H10W99/00; B; B23; B23K; B23K35/00; B23K35/001; B32; B32B; B32B15/00; B32B15/01; C; C25; C25F; C25F3/00; C25F3/02; C25F3/12; H10P; H10P50/00; H10P50/60; H10P50/61; H10P50/613; H10P95/00; B23K2035/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
THE METHOD OF PRODUCING A JUNCTION BETWEEN A SILICON SEMICONDUCTOR BODY AND AN ALUMINUM ELECTRODE MEMBER, COMPRISING THE STEPS OF APPLYING TITANIUM TO THE SURFACES OF A WAFER OF TIN, PLACING ONE OF SAID SURFACES IN CONTACT WITH A SURFACE OF SAID SEMICONDUCTOR BODY, PLACING SAID ELECTRODE MEMBER IN CONTACT WITH THE OTHER SURFACE OF SAID FUSIBLE WAFER, AND HEATING SAID SURFACES TO A TEMPERATURE IN THE RANGE OF 550*C. TO 850*C. TO CAUSE SAID WAFER TO DISSOLVE SAID TITANIUM AND WET SAID SURFACE OF SAID SEMICONDUCTOR BODY.
Claim 2
Independent Claim
88 words
THE METHOD OF PRODUCING A JUNCTION BETWEEN A SILICON SEMICONDUCTOR BODY AND AN ALUMINUM ELECTRODE MEMBER, COMPRISING THE STEPS OF APPLYING TITANIUM TO THE SURFACES OF A WAFER OF TIN, PLACING ONE OF SAID SURFACES IN CONTACT WITH A SURFACE OF SAID SEMICONDUCTOR BODY, PLACING SAID ELECTRODE MEMBER IN CONTACT WITH THE OTHER SURFACE OF SAID FUSIBLE WAFER, AND HEATING SAID SURFACES TO A TEMPERATURE IN THE RANGE OF 550*C. TO 850*C. TO CAUSE SAID WAFER TO DISSOLVE SAID TITANIUM AND WET SAID SURFACE OF SAID SEMICONDUCTOR BODY.
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) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |