US4757364A
Expired / Lapsed
US
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Light emitting element
Assignee: Toshiba Corp
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Filing: 1985-11-05
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Granted: 1988-07-12
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Expires: 2005-11-05
Abstract
Abstract A light emitting element formed of a metal-insulator-semiconductor junction, the improvement wherein the insulator is a Langmuir-Blodgett film of an organic substance containing at least one of a synthetic protein and a natural protein. According to the element of this invention, stability of dynamic characteristics, luminescence efficiency and long-term stability can be significantly improved.
Inventors
- 👤 Akira Miura
- 👤 Koichi Mizushima
- 👤 Keijiro Hirahara
- 👤 Nobuhiro Gemma
- 👤 Taiji Furuno
- 👤 Hiroyuki Sasabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:19
CPC Classifications
H; H10; H10D; H10D1/00; H10D1/60; H10D1/62; H10D1/66; H10H; H10H20/00; H10H20/052; H10K; H10K50/00; H10K50/10; H10K50/11; Y; Y10; Y10S; Y10S930/00; Y10S930/01; Y10S930/29
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A light emitting element comprising a metal-insulator-semiconductor junction wherein the insulator is a Langmuir-Blodgett film of an organic substance containing a synthetic protein represented by the following formula: ##STR2## wherein R m and R n may be the same or different and each represent a substituent residual group capable of yielding phenylalanine, and x and y stand for the numbers of respective peptide bonds, the total number of peptide bonds being 20 or more.
Claim 2
Dependent Claim
74 words
A light emitting element comprising a metal-insulator-semiconductor junction wherein the insulator is a Langmuir-Blodgett film of an organic substance containing a synthetic protein represented by the following formula: ##STR2## wherein R m and R n may be the same or different and each represent a substituent residual group capable of yielding phenylalanine, and x and y stand for the numbers of respective peptide bonds, the total number of peptide bonds being 20 or more.
Claim 3
Dependent Claim
117 words
A light emitting element comprising a metal-insulator-semiconductor junction wherein the insulator is a Langmuir-Blodgett film of an organic substance containing film-forming molecules and at least one of a synthetic protein and a natural protein wherein the synthetic protein is a substituted polypeptide represented by the following formula: ##STR3## wherein R m and R n may be the same or different and each represent a substituent residual group capable of yielding an α-amino acid selected from the group consisting of cystine, thyroxine, tryptophane, tyrosine, threonine, histidine, phenylalanine, methionine, lysine, proline, leucine, glutamic acid, arginine, and glutamine, and x and y stand for the numbers of respective peptide bonds, the total number of peptide bonds being 20 or more.
Claim 4
Dependent Claim
117 words
A light emitting element comprising a metal-insulator-semiconductor junction wherein the insulator is a Langmuir-Blodgett film of an organic substance containing film-forming molecules and at least one of a synthetic protein and a natural protein wherein the synthetic protein is a substituted polypeptide represented by the following formula: ##STR3## wherein R m and R n may be the same or different and each represent a substituent residual group capable of yielding an α-amino acid selected from the group consisting of cystine, thyroxine, tryptophane, tyrosine, threonine, histidine, phenylalanine, methionine, lysine, proline, leucine, glutamic acid, arginine, and glutamine, and x and y stand for the numbers of respective peptide bonds, the total number of peptide bonds being 20 or more.
Claim 5
Dependent Claim
19 words
The light emitting element according to claim 2, wherein said natural protein is an antibiotic polypeptide or a phosphoprotein.
Claim 6
Dependent Claim
23 words
The light emitting element according to claim 3, wherein said antibiotic polypeptide is gramicidin-S or tyrocidin-S, and said phosphoprotein is gelatin or casein.
Claim 7
Dependent Claim
28 words
The light emitting element according to claim 2, wherein said film-forming molecules are selected from the group consisting of stearic acid, arachinic acid, behenic acid and vinyl stearate.
Claim 8
Dependent Claim
24 words
The light emitting element according to claim 2 wherein the a-amino acid is selected from the group consisting of histidine, phenylalanine, proline and leucine.
Claim 9
Dependent Claim
22 words
The light emitting element according to claim 2 wherein the a-amino acid is selected from the group consisting of histidine and phenylalanine.
References Cited (Backward Citations)
JPS5235587A
Cited
GB1572181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |