US4916516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor contact arrangement
Assignee: Siemens Mobility Ltd
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Filing: 1988-11-16
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Granted: 1990-04-10
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Expires: 2008-11-16
Abstract
Abstract A semiconductor contact arrangement comprising a semiconductor wafer having on one of its major faces an area of one type of conductivity and an electrical contact in face-to-face engagement with that area, in which the contact is located with respect to that area and is secured to the sandwich by a stud welded to the wafer and projecting into a hole extending through the contact from the face thereof engaged with the wafer.
Inventors
- 👤 Clifford V. H. Miles
- 👤 Patrick L. T. Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:38
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/20; H10W20/00; H10W20/40; H10W20/482; H10W20/483; H10W72/251; H10W72/50; H10W72/551; H10W72/552; H10W72/5524
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A semiconductor contact arrangement comprising: (a) a semiconductor wafer having first and second major faces, said wafer having on one of said faces an area of a given conductivity type; (b) a generally planar electrical contact having a face in direct engagement with said area to form a sandwich, said contact defining a hole extending through the contact from said area; (c) a stud welded on to said area, said stud projecting into said hole to locate said contact on said wafer and secure said contact to said wafer.
Claim 2
Dependent Claim
89 words
A semiconductor contact arrangement comprising: (a) a semiconductor wafer having first and second major faces, said wafer having on one of said faces an area of a given conductivity type; (b) a generally planar electrical contact having a face in direct engagement with said area to form a sandwich, said contact defining a hole extending through the contact from said area; (c) a stud welded on to said area, said stud projecting into said hole to locate said contact on said wafer and secure said contact to said wafer.
Claim 3
Dependent Claim
28 words
An arrangement as claimed in claim 1, wherein the stud is encircled by a sleeve of electrically insulating material whereby the stud is electrically insulated from the contact.
Claim 4
Dependent Claim
40 words
An arrangement as claimed in claim 1, wherein said stud has been formed from a ball of material weldable to said area, said ball having been positioned in said hole and subsequently welded to said area to form said stud.
Claim 5
Dependent Claim
25 words
An arrangement as claimed in claim 2, wherein the sleeve is button-shaped and is secured to said area by the stud extending through the hole.
Claim 6
Dependent Claim
51 words
An arrangement as claimed in claim 4, wherein the sleeve has therein more than a single hole and the stud is constituted by a length of wire which passes through two of the holes in the sleeve and is welded to said area at each end of the length of wire.
Claim 7
Dependent Claim
26 words
An arrangement as claimed in claim 2, wherein the stud has a head and a shank, the head being larger in cross-sectional area than the shank.
Claim 8
Dependent Claim
29 words
An arrangement as claimed in claim 1, wherein the hole in the contact has been formed by etching of the contact during or after the shaping of the contact.
Claim 9
Dependent Claim
18 words
An arrangement as claimed in claim 1, wherein the hole in the contact has been formed by machining.
References Cited (Backward Citations)
US3462349A
Cited
US3781977A
Cited
US3831068A
Cited
US3753053A
Cited
US3783348A
Cited
US3912852A
Cited
US4173768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |