Patent US4250520A successfully refreshed from Google Patents.
US4250520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flip chip mounted diode
Assignee: RCA Corp
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Filing: 1979-03-14
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Granted: 1981-02-10
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Expires: 1999-03-14
Abstract
Abstract A planar semiconductor device having a cathode region surrounding an anode region is flip chip mounted to a conductor film circuit. An anode contact extends from the anode region and is bonded to a first portion of the conductor film circuit such that that portion of the cathode region which overlaps the first portion of the conductor film circuit is minimized. That portion of the cathode region distal from the anode region is relatively wide, and a relatively large area cathode contact extends from the cathode region and is bonded to a second portion of the conductor film circuit.
Inventors
- 👤 Edgar J. Denlinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:43
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/20; H10W44/00; H10W44/20; H10W72/071; H10W72/072; H10W72/07231; H10W72/07236; H10W72/07251; H10W72/251
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
160 words
A thin film circuit, comprising: (a) a circuit carrier which includes thereon a conductor film pattern having a first portion spaced from a second portion; (b) a planar semiconductor diode which overlaps and is bonded to the first and second portions of the conductor film pattern; (c) the semiconductor diode comprising a generally triangular cathode region surrounding an anode region, the anode region being in proximity to an apex of the triangular cathode region; and (d) a post-shaped anode contact extending from the anode region and bonded to the first portion of the conductor film pattern, and a post-shaped cathode contact, distal from the anode contact, extending from the cathode region and bonded to the second portion of the conductor film pattern; with that portion of the cathode region which overlaps the first portion of the conductor film pattern being of smaller area than that portion of the cathode region which overlaps the second portion of the conductor film pattern.
Claim 2
Dependent Claim
160 words
A thin film circuit, comprising: (a) a circuit carrier which includes thereon a conductor film pattern having a first portion spaced from a second portion; (b) a planar semiconductor diode which overlaps and is bonded to the first and second portions of the conductor film pattern; (c) the semiconductor diode comprising a generally triangular cathode region surrounding an anode region, the anode region being in proximity to an apex of the triangular cathode region; and (d) a post-shaped anode contact extending from the anode region and bonded to the first portion of the conductor film pattern, and a post-shaped cathode contact, distal from the anode contact, extending from the cathode region and bonded to the second portion of the conductor film pattern; with that portion of the cathode region which overlaps the first portion of the conductor film pattern being of smaller area than that portion of the cathode region which overlaps the second portion of the conductor film pattern.
Claim 3
Dependent Claim
32 words
A circuit of claim 1, wherein: the cathode contact comprises a plurality of posts projecting from the cathode region, such that the posts can be directly bonded to the conductor film pattern.
Claim 4
Dependent Claim
30 words
A circuit of claim 1 wherein: the cathode contact comprises a post of rectangular transverse cross sectional shape, and has a greater transverse cross sectional area than the anode contact.
Claim 5
Dependent Claim
30 words
A circuit of claim 1 wherein: the first portion of the conductor film pattern is shaped so as to create minimal overlap with the cathode region of the semiconductor device.
Claim 6
Dependent Claim
32 words
A circuit of claim 1 comprising a plurality of semiconductor devices bonded to a single conductor film pattern such that the conductor film pattern provides a series electrical interconnection among the devices.
Claim 7
Dependent Claim
32 words
A circuit of claim 1 comprising a plurality of semiconductor devices bonded to a single conductor film pattern such that the conductor film pattern provides a parallel electrical interconnection among the devices.
Claim 8
Dependent Claim
33 words
A circuit of claim 1 comprising a plurality of semiconductor devices bonded to a single conductor film pattern such that the conductor film pattern provides series and parallel electrical interconnection among the devices.
Claim 9
Dependent Claim
23 words
A circuit of claim 1, wherein: the cathode region is of first conductivity type; and the anode region is of second conductivity type.
Claim 10
Dependent Claim
32 words
A circuit of claim 1, wherein: the anode region is of the same conductivity type as the cathode region; and the anode contact forms a Schottky barrier junction with the anode region.
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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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |