Patent US5373176A successfully refreshed from Google Patents.
US5373176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structurally matched ferroelectric device
Assignee: Rohm Co Ltd
•
Filing: 1992-08-04
•
Granted: 1994-12-13
•
Expires: 2012-08-04
Abstract
Abstract A ferroelectrics device includes a semiconductor substrate having a diamond structure or zinc blend structure, and a ferroelectric compound film formed on the semiconductor substrate by selective epitaxial growth. The ferroelectric compound film is made of a mixed crystal of at least three components in groups II and VI and has the same structure as the semiconductor substrate.
Inventors
- 👤 Takashi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:49
CPC Classifications
H; H10; H10D; H10D30/00; H10D30/60; H10D30/701
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
A ferroelectrics device, comprising: a semiconductor substrate having a diamond structure or zinc blende structure; and a ferroelectric compound film formed on said semiconductor substrate, said ferroelectric compound film being made of a mixed crystal of at least three components in groups II and VI and having the same structure as said semiconductor substrate.
Claim 2
Dependent Claim
54 words
A ferroelectrics device, comprising: a semiconductor substrate having a diamond structure or zinc blende structure; and a ferroelectric compound film formed on said semiconductor substrate, said ferroelectric compound film being made of a mixed crystal of at least three components in groups II and VI and having the same structure as said semiconductor substrate.
Claim 3
Dependent Claim
21 words
A ferroelectrics device as claimed in claim 1, wherein said three components of said compound film are Zn, Cd and Te.
Claim 4
Dependent Claim
18 words
A ferroelectrics device as claimed in claim 1, wherein said compound film is formed by selective epitaxial growth.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-12 | 1998-06-13 | 1998-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-12 | 2002-06-13 | 2002-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-12 | 2006-06-13 | 2006-12-13 | $7700.00 | Window Closed / Lapsed |