US3886587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isolated photodiode array
Assignee: Harris Corp
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Filing: 1973-07-19
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Granted: 1975-05-27
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Expires: 1993-07-19
Abstract
Abstract Low impurity concentration planar anode regions are formed without a mask in a plurality of cathode regions which are isolated from each other on their lateral edge by an insulating barrier and connected to each other by a low resistivity polycrystalline body. Metal contacts to the anode regions and the common cathode polycrystalline body are coplanar.
Inventors
- 👤 Hugh Crawford Nicolay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:12
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/18; H10P; H10P95/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
178 words
A photodiode array comprising: a semiconductor body of polycrystalline structure of one type conductivity having a planar surface; a first plurality of spaced apart photosensitive single crystal planar regions of semiconductor material of opposite conductivity type to said one conductivity type, said first plurality of planar regions having a top, bottom and lateral surfaces, said bottom and lateral surfaces being surrounded by said body and said top surface being substantially coplanar with said planar surface; a corresponding second plurality of single crystal buried regions of semiconductor material of said one conductivity type having a top, bottom and lateral surfaces, said top surfaces of said buried region being adjacent said bottom surface of a corresponding planar region, said lateral surface of said buried region being surrounded by said body and said bottom surface of said buried region being adjacent said body; a plurality of first insulating barriers extending from said planar surface to said bottom of said second plurality of buried regions and separating said polycrystalline body and said lateral surfaces of said first and second plurality of regions.
Claim 2
Dependent Claim
178 words
A photodiode array comprising: a semiconductor body of polycrystalline structure of one type conductivity having a planar surface; a first plurality of spaced apart photosensitive single crystal planar regions of semiconductor material of opposite conductivity type to said one conductivity type, said first plurality of planar regions having a top, bottom and lateral surfaces, said bottom and lateral surfaces being surrounded by said body and said top surface being substantially coplanar with said planar surface; a corresponding second plurality of single crystal buried regions of semiconductor material of said one conductivity type having a top, bottom and lateral surfaces, said top surfaces of said buried region being adjacent said bottom surface of a corresponding planar region, said lateral surface of said buried region being surrounded by said body and said bottom surface of said buried region being adjacent said body; a plurality of first insulating barriers extending from said planar surface to said bottom of said second plurality of buried regions and separating said polycrystalline body and said lateral surfaces of said first and second plurality of regions.
Claim 3
Dependent Claim
64 words
A device as in claim 1 including a second insulating layer covering said planar surface and said top surface of said fiRst plurality of planar regions, a plurality of openings in said second insulating layer exposing a portion of said top surface of said first plurality of planar regions and an opening in said second insulating layer exposing a portion of said polycrystalline body.
Claim 4
Dependent Claim
30 words
A device as in claim 1 wherein said bottom surface of said first plurality of planar regions are coextensive with said top surfaces of said second plurality of buried regions.
Claim 5
Dependent Claim
31 words
A device as in claim 3 wherein said polycrystalline body has a sufficiently high concentration of impurities to form a common low resistance current path for said second plurality of regions.
Claim 6
Dependent Claim
60 words
A device as in claim 2 including a plurality of first conductors extending through said plurality of openings into contact with said first plurality of regions, and a second conductor extending through said opening into contact with said polycrystalline body, said plurality of first conductors constituting a plurality of anode conductors and said second conductor constituting a common cathode conductor.
References Cited (Backward Citations)
US3383760A
Cited
US3447235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |