US3729807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making thermo-compression-bonded semiconductor device
Assignee: Panasonic Holdings Corp
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Filing: 1971-10-29
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Granted: 1973-05-01
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Expires: 1991-10-29
Abstract
Abstract In making a semiconductor device comprising a die of silicon, germanium or gallium arsenide, the bonding of the die onto a metal header (i.e., holding member) is made firmly without insertion of a conventional thin gold film therebetween, by depositing gold onto the bonding face of a slice, which is to be cut into the die, in such a manner that at least the surface of the deposited layer is gold or an alloy of gold containing small amounts of an additive.
Inventors
- 👤 S Fujiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:49
CPC Classifications
H; H10; H10P; H10P95/00; H10W; H10W72/00; H10W72/071; H10W72/073; H10W72/07331; H10W72/07332; H10W72/07336; H10W72/30; H10W72/351; H10W72/352; H10W72/50; H10W72/551; H10W72/552; H10W72/5522; H10W72/59; H10W72/851; H10W72/874; H10W72/884; H10W72/90; H10W72/951; H10W72/952; H10W90/00; H10W90/701; H10W90/731; H10W90/736; H10W90/751; H10W90/753; H10W90/754
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
26 words
The method of claim 1, wherein said vapor-deposited layer is a layer of an alloy of gold containing 1 to 10 percent of chromium by weight.
Claim 2
Dependent Claim
26 words
The method of claim 1, wherein said vapor-deposited layer is a layer of an alloy of gold containing 1 to 10 percent of silicon by weight.
Claim 3
Dependent Claim
27 words
The method of claim 1, wherein said vapor deposited layer is a layer of an alloy of gold containing 1 to 15 percent of germanium by weight.
Claim 4
Dependent Claim
21 words
The method of claim 1, further comprising the step of sand-blasting the bonding face of the slice prior to vapor deposition.
References Cited (Backward Citations)
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US3585711A
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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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |