Patent US5998804A successfully refreshed from Google Patents.
US5998804A
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Transistors incorporating substrates comprising liquid crystal polymers
Assignee: CNA Holdings LLC
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Filing: 1997-07-03
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Granted: 1999-12-07
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Expires: 2017-07-03
Abstract
Abstract Disclosed in this invention are transistors which contain substrates that are made of liquid crystalline polymers. Such substrates are compatible with semiconducting layers especially organic semiconducting layers. This enables one to prepare all organic transistors.
Inventors
- 👤 Suk Youn Suh
- 👤 Sunny S. Shen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:36
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W70/695; C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/065; C08G63/60
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
39 words
A transistor comprising an organic substrate and a semiconducting material, wherein said substrate comprises a wholly aromatic thermotropic liquid crystalline polymer, said liquid crystal polymer comprising a polyester, said polyester comprising repeat units from 4-hydroxybenzoic acid and 6-hydroxynapthoic acid.
Claim 2
Dependent Claim
39 words
A transistor comprising an organic substrate and a semiconducting material, wherein said substrate comprises a wholly aromatic thermotropic liquid crystalline polymer, said liquid crystal polymer comprising a polyester, said polyester comprising repeat units from 4-hydroxybenzoic acid and 6-hydroxynapthoic acid.
Claim 3
Dependent Claim
74 words
The transistor of claim 1, wherein said polyester comprises repeat units corresponding to the formula: -[P.sup.1 ].sub.m -[P.sup.2 ].sub.n -[P.sup.3 ].sub.q - wherein P 1 , P 2 and P 3 represent monomeric moieties with P 1 being an aromatic hydroxy carboxylic acid, P 2 being an aromatic dicarboxylic acid and P 3 being a phenol; and m, n and q represent mole percent of the respective monomers ranging from 5-70 mole percent individually.
Claim 4
Dependent Claim
69 words
The transistor of claim 2, wherein said repeat unit further comprises monomeric moieties -[P 4 ] r - and -[P 5 ] s -, wherein P 4 represents a second aromatic hydroxycarboxylic acid moiety different from P 1 , and P 5 represents a second phenolic moiety different from P 3 , and r and s represent mole percent of the respective monomers ranging from 5-20 mole percent individually.
Claim 5
Dependent Claim
21 words
The transistor of claim 2, wherein P 1 is selected from the group consisting of 4-hydroxybenzoic acid, 2-hydroxy-6-naphthoic acid, and 4-carboxy-4'-hydroxy-1,1'-biphenyl.
Claim 6
Dependent Claim
33 words
The transistor of claim 2, wherein P 2 is selected from the group consisting of terephthalic acid, isophthalic acid, phthalic acid, 2-phenylterephthalic acid, 1,2-naphthalenedicarboxylic acid, 1,4-naphthalenedicarboxylic acid, 2,6-naphthalene dicarboxylic acid and 4,4'-biphenyldicarboxylic acid.
Claim 7
Dependent Claim
25 words
The transistor of claim 2, wherein P 3 is selected from the group consisting of resorcinol, hydroquinone, methyl hydroquinone, phenyl hydroquinone, catechol, 4,4'-dihydroxybiphenyl and acetaminophen.
Claim 8
Dependent Claim
25 words
The transistor of claim 3, wherein said P 5 is a diphenol selected from the group consisting of resorcinol, hydroquinone, catechol, 4,4'-dihydroxybiphenyl, bisphenol-A and acetaminophen.
Claim 9
Dependent Claim
11 words
The transistor of claim 4, wherein P 1 is 4-hydroxybenzoic acid.
Claim 10
Dependent Claim
11 words
The transistor of claim 5, wherein P 2 is terephthalic acid.
Claim 11
Dependent Claim
10 words
The transistor of claim 6, wherein P 3 is 4,4'-dihydroxybiphenyl.
Claim 12
Dependent Claim
12 words
The transistor of claim 3, wherein said P 4 is 4-hydroxybenzoic acid.
Claim 13
Dependent Claim
11 words
The transistor of claim 3, wherein said P 5 is resorcinol.
Claim 14
Dependent Claim
11 words
The transistor of claim 1, wherein the semiconducting material is organic.
Claim 15
Dependent Claim
11 words
The transistor of claim 1, wherein the semiconducting material is inorganic.
Claim 16
Dependent Claim
26 words
The transistor of claim 1, wherein said liquid crystal polyester comprises 4-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, terephthalic acid, 4,4'-dihydroxybiphenyl and resorcinol in a molar ratio 30:30:20:10:10 respectively.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2002-12-06 | 2003-06-07 | 2003-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-12-06 | 2007-06-07 | 2007-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-12-06 | 2011-06-07 | 2011-12-07 | $7700.00 | Window Closed / Lapsed |