Patent US6740928B2 successfully refreshed from Google Patents.
US6740928B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor device
Assignee: Panasonic Holdings Corp
•
Filing: 2003-01-24
•
Granted: 2004-05-25
•
Expires: 2023-01-24
Abstract
Abstract The semiconductor device of the present invention includes: particles or interface states for passing charge formed on a p-type silicon substrate via a barrier layer; and particles for holding charge formed above the charge-passing particles via another barrier layer. The charge-holding particles are different from the charge-passing particles in parameters such as the particle diameter, the capacitance, the electron affinity, and the sum of electron affinity and forbidden bandwidth, to attain swift charge injection and release as well as stable charge holding in the charge-holding particles.
Inventors
- 👤 Shigeo Yoshii
- 👤 Kiyoshi Morimoto
- 👤 Kiyoyuki Morita
- 👤 Haruyuki Sorada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:07
CPC Classifications
B; B82; B82Y; B82Y10/00; G; G11; G11C; G11C13/00; G11C13/02; G11C13/025; H; H10; H10D; H10D30/00; H10D30/60; H10D30/68; H10D30/681; H10D30/683; H10D30/6891; H10D30/6893; G11C16/00; G11C16/02; G11C16/04; G11C16/0408; G11C16/0466; G11C2216/00; G11C2216/02; G11C2216/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
A semiconductor device comprising: a substrate having a conductive layer; a first barrier layer formed on the conductive layer for functioning as a barrier for charge transfer; quantized first particles formed on the first barrier layer; a second barrier layer formed on the first particles for functioning as a barrier for charge transfer; and second particles formed on the second barrier layer for holding charge; wherein the diameter of the second particles is larger than the diameter of the first particles.
Claim 2
Dependent Claim
81 words
A semiconductor device comprising: a substrate having a conductive layer; a first barrier layer formed on the conductive layer for functioning as a barrier for charge transfer; quantized first particles formed on the first barrier layer; a second barrier layer formed on the first particles for functioning as a barrier for charge transfer; and second particles formed on the second barrier layer for holding charge; wherein the diameter of the second particles is larger than the diameter of the first particles.
Claim 3
Dependent Claim
31 words
The semiconductor device of claim 1 , wherein the ratio of the diameter of the second particles to the first particles is not less than 1.8 and not more than 300.
Claim 4
Dependent Claim
26 words
The semiconductor device of claim 1 , wherein the diameter of the first particles is not less than 0.1 nm and not more than 5 nm.
Claim 5
Dependent Claim
26 words
The semiconductor device of claim 1 , wherein the diameter of the second particles is not less than 1 nm and not more than 30 nm.
Claim 6
Dependent Claim
52 words
The semiconductor device of claim 1 , further comprising: an insulating layer formed on the second particles; a gate electrode formed on the insulating layer; and source/drain regions formed in regions of the conductive layer located below both sides of the gate electrode, wherein the semiconductor device functions as a MIS transistor.
References Cited (Backward Citations)
US4047974A
Cited
US4104675A
Cited
JPH07111295A
Cited
JPH08167662A
Cited
US5670790A
Cited
JPH09148462A
Cited
US5714766A
Cited
JPH09116106A
Cited
US5774400A
Cited
JPH1065024A
Cited
US5952692A
Cited
EP0843361A1
Cited
JPH10200001A
Cited
JPH10173181A
Cited
US5852306A
Cited
US5959896A
Cited
JPH1140809A
Cited
JPH10335499A
Cited
JPH11111867A
Cited
US6090666A
Cited
EP0915479A2
Cited
JPH11330273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-05-25 | 2007-11-24 | 2008-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-05-25 | 2011-11-24 | 2012-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-05-25 | 2015-11-24 | 2016-05-25 | $7700.00 | Window Closed / Lapsed |