Claims
- 1. A substrate for liquid crystal display comprising a high quality plastic sheet having an electronic component disposed on at least one side of the sheet; wherein the plastic sheet is produced by the process comprising the steps of:a) providing molten plastic resin; b) directing the molten plastic resin to an overflow die having an inlet and an outlet; c) shaping the molten plastic resin into a molten web using said overflow die; d) guiding said molten web away from said overflow die; and e) cooling said molten web to form a solid sheet; wherein the resin is a polycarbonate or polycarbonate-polyester comprising one or more bisphenols selected from the group consisting of bis(4-hydroxyphenyl) alkanes and cycloalkanes; bis(3-substituted4-hydroxyphenyl) alkyl-cycloalkanes; bis(3,5-disubstituted-4-hydroxyphenyl) alkylcycloalkanes; 2,2-bis(3-methyl4-hydroxyphenyl)propane; 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane; 1,1-bis(4-hydroxyphenyl)cyclohexane; 2,2-bis(3-phenyl-4-hydroxyphenyl)propane; 2,2-bis(3-isopropyl-4-hydroxyphenyl)propane; 2,2-bis(4-hydroxyphenyl)butane; 9,9-bis(4-hydroxyphenyl)fluorene; 9,9-bis(4-hydroxy-3-methylphenyl)fluorene; 1,1-bis(4-hydroxyphenyl)-3,3-dimethylcyclohexane; 1,1-bis(3,5-dimethyl4-hydroxyphenyl)-3,3,5-trimethylcyclohexane; 1,3-bis(4-hydroxyphenyl)-5,7-dimethyladamantane; 1, 1-bis(4-hydroxyphenyl)-1-phenylethane; 4,4′-dihydroxy-tetraphenylmethane; 2,2-bis(4-hydroxyphenyl) propane; 6,6′-dihydroxy-3,3,3′,3′-tetramethyl-1,1′-spiro(bis)indane, and mixtures thereof; and provided that when the plastic resin is a polycarbonate, it does not contain as bisphenol components (1) 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane; (2) a mixture of 2,2-bis(4-hydroxyphenyl)propane and 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane; a blend of (1) and (2); or a blend of (1) or (2) with a second polycarbonate containing as a bisphenol component 2,2-bis(4-hydroxyphenyl)propane.
- 2. The substrate of claim 1 wherein the electronic component is selected from a layer of active electronic devices and a conductive layer.
- 3. The substrate of claim 1 wherein further comprising one or more layers of protective coatings, color filter coatings, or barrier coatings disposed between the plastic sheet and the electronic component.
- 4. A substrate for liquid crystal display comprising a high quality plastic sheet having an electronic component disposed on at least one side of the sheet, wherein the sheet is a polycarbonate or polycarbonate-polyester comprising one or more bisphenols selected from the group consisting of bis(4-hydroxyphenyl) alkanes and cycloalkanes; bis(3-substituted-4-hydroxyphenyl) alkyl-cycloalkanes; bis(3,5-disubstituted-4-hydroxyphenyl) alkylcycloalkanes; 2,2-bis(3-methyl4-hydroxyphenyl)propane; 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane; 1,1-bis(4-hydroxyphenyl)cyclohexane; 2,2-bis(3-phenyl4-hydroxyphenyl)propane; 2,2-bis(3-isopropyl-4-hydroxyphenyl)propane; 2,2-bis(4-hydroxyphenyl)butane; 9,9-bis(4-hydroxyphenyl)fluorene; 9,9-bis(4-hydroxy-3-methylphenyl)fluorene; 1,1-bis(4-hydroxyphenyl)-3,3-dimethylcyclohexane; 1,1-bis(3,5-dimethyl-4-hydroxyphenyl)-3,3,5-trimethylcyclohexane; 1,3-bis(4-hydroxyphenyl)-5,7-dimethyladamantane; 1,1-bis(4-hydroxyphenyl)-1-phenylethane; 4,4′-dihydroxy-tetraphenylmethane; 2,2-bis(4-hydroxyphenyl) propane; 6,6′-dihydroxy-3,3,3′,3′-tetramethyl-1,1′-spiro(bis)indane, and mixtures thereof; and provided that when the sheet is a polycarbonate, it does not contain as bisphenol components (1) 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane; (2) a mixture of 2,2-bis(4-hydroxyphenyl)propane and 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane; a blend of (1) and (2); or a blend of (1) or (2) with a second polycarbonate containing as a bisphenol component 2,2-bis(4-hydroxyphenyl)propane.
- 5. The substrate of claim 4 wherein the sheet has a thickness variation of 10% or less over a sample length of 400 mm.
- 6. The substrate of claim 4 wherein the sheet has an optical retardance of 20 nm or less.
- 7. The substrate of claim 4 wherein the sheet has a roughness of ≦50 nm over a 0.4 mm length.
- 8. The substrate of claim 4 wherein the sheet has a waviness of ≦2.0μ in a 20 mm sampling length.
- 9. The substrate of claim 4 wherein the sheet has an optical retardance of 20 nm or less, a thickness variation of 10% or less over a sample length of 400 mm, a roughness of ≦50 nm over a 0.4 mm length and a waviness of ≦2.0μ in a 20 mm sampling length.
Parent Case Info
This application is a divisional of application Ser. No. 09/184,391, filed on Nov. 2, 1998, now U.S. Pat. No. 6,183,829 issued Mar. 6, 2001, which claims the benefit of provisional application No. 60/064,642, filed Nov. 7, 1997.
US Referenced Citations (31)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0 785 544 |
Jul 1997 |
EP |
Non-Patent Literature Citations (2)
Entry |
Database WPI, Section Ch, Week 198530, Derwent Publications Ltd., London, GB; AN 1985-181774; XP002184135 & JP 60 111335 A (Denki Kagaku Kogyo KK), Jun. 17, 1985 *abstract*. |
Patent Abstracts of Japan, vol. 1997, No. 05, May 30, 1997 & JP 09 026509 A (Mitsui Toatsu Chem Inc.) Jan. 28, 1997, *abstract*. |
Provisional Applications (1)
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Number |
Date |
Country |
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60/064642 |
Nov 1997 |
US |