US4450470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor integrated circuit device
Assignee: NEC Corp
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Filing: 1979-02-12
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Granted: 1984-05-22
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Expires: 1999-02-12
Abstract
Abstract An integrated circuit device of large scale integration and a method of manufacturing the same makes possible high density packing of circuit elements by eliminating a great number of very minute contact holes. Instead, a circuit-element connector comprised of a polycrystalline silicon wiring path is formed by selective oxidation. Impurity atoms are introduced into the semiconductor substrate through the polycrystalline silicon circuit-element connector to form a desired circuit element. A layer of high-conductive material is provided on the polycrystalline silicon layer.
Inventors
- 👤 Hiroshi Shiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:43
CPC Classifications
H; H10; H10W; H10W20/00; H10W20/01; H10W20/031; H10W20/069; H10D; H10D62/00; H10D62/40; H10D84/00; H10D84/101; H10D84/121; H10D84/60; H10D84/611; H10D84/613; H10D88/00; H10P; H10P14/00; H10P14/60; H10P14/61; H10P14/63; H10P14/6302; H10P14/6304; H10P14/6306; H10P14/6308; H10P32/00; H10P32/30; H10P32/302; H10W10/00; H10W10/01; H10W10/011; H10W10/012; H10W10/10; H10W10/13; Y; Y10; Y10S; Y10S148/00; Y10S148/019
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
An integrated circuit device comprising a semiconductor substrate, an insulating film covering at least a part of one major surface of said substrate, a thin polycrystalline silicon layer formed on said insulating film, said silicon layer having a common portion and first and second branch portions connected at their one ends to said common portion and running in parallel with each other, first, second, and third PN junctions formed in said silicon layer from the upper surface to the bottom of said layer, a highly conductive layer covering the upper surface of said silicon layer except predetermined portions where diodes are to be formed, said first PN junction being located in said common portion and shorted by said highly conductive layer, and said second and third PN junctions being located in said first and second branch portions, respectively, said highly conductive layer being absent at said second and third PN junctions to form diodes there, and means coupled to the respective other ends of said first and second branch portions for applying signals to said diodes formed in said first and second branch portions.
Claim 2
Dependent Claim
184 words
An integrated circuit device comprising a semiconductor substrate, an insulating film covering at least a part of one major surface of said substrate, a thin polycrystalline silicon layer formed on said insulating film, said silicon layer having a common portion and first and second branch portions connected at their one ends to said common portion and running in parallel with each other, first, second, and third PN junctions formed in said silicon layer from the upper surface to the bottom of said layer, a highly conductive layer covering the upper surface of said silicon layer except predetermined portions where diodes are to be formed, said first PN junction being located in said common portion and shorted by said highly conductive layer, and said second and third PN junctions being located in said first and second branch portions, respectively, said highly conductive layer being absent at said second and third PN junctions to form diodes there, and means coupled to the respective other ends of said first and second branch portions for applying signals to said diodes formed in said first and second branch portions.
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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) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |