Patent US4917752A successfully refreshed from Google Patents.
US4917752A
Expired / Lapsed
US
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Method of forming contacts on semiconductor members
Assignee: Spheral Solar Power Inc
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Filing: 1986-09-11
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Granted: 1990-04-17
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Expires: 2006-09-11
Abstract
Abstract The disclosure relates to a method of forming adherent contacts to oxide coated semiconductor material wherein the oxide coating and a portion of the semiconductor material are mechanically removed, such as by abrading, to provide a roughened surface on the semiconductor material. The contact material is then applied over the mechanically roughened surface and bonded at elevated temperatures to provide the adherent contact.
Inventors
- 👤 Millard J. Jensen
- 👤 Jules D. Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:09
CPC Classifications
H; H10; H10F; H10F71/00; H10F71/137; H10F19/00; H10F19/90; H10F19/902; H10F19/904; H10F71/121; H10F77/00; H10F77/10; H10F77/14; H10F77/147; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/547; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
A method of forming aluminum foil contacts on silicon members, comprising the steps of: (a) providing a silicon member having an oxide layer thereon, (b) mechanically removing a portion of said oxide and an adjacent portion of said silicon member, (c) providing a roughened surface on the silicon member in the region whereat the silicon member portion was removed, and (d) bonding a contact on said roughened surface by impact pressing aluminum foil at temperatures in the range of 500 to 577 degrees C. to said roughened surface.
Claim 2
Independent Claim
88 words
A method of forming aluminum foil contacts on silicon members, comprising the steps of: (a) providing a silicon member having an oxide layer thereon, (b) mechanically removing a portion of said oxide and an adjacent portion of said silicon member, (c) providing a roughened surface on the silicon member in the region whereat the silicon member portion was removed, and (d) bonding a contact on said roughened surface by impact pressing aluminum foil at temperatures in the range of 500 to 577 degrees C. to said roughened surface.
Claim 3
Dependent Claim
26 words
A method as set forth in claim 1 wherein steps (b) and (c) comprise abrading at least a portion of said oxide and said silicon member.
Claim 4
Dependent Claim
22 words
A method as set forth in claim 1 wherein said silicon member is of spheroid shape and said contact is a foil.
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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) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |