Claims
- 1. An etched article made by:
- (a) coating at least a portion of a surface of an article with a composition comprising a random copolymer of an isoolefin of 4 to 7 carbon atoms and para-alkylstyrene comonomer, said isoolefin comprising 10 to 99.5 weight % of said copolymer and said para-alkylstyrene comprises 0.5 to 90 weight % of said copolymer, wherein about 0.5 to 55 weight % of said copolymer comprises para-alkylstyrene monomers having a photoinitiator substituted on the pendent alkyl group, said copolymer having a substantially homogeneous compositional distribution;
- (b) selectively exposing said surface to gamma, UV, electron beam, visible, or microwave radiation to crosslink the copolymer "in the area exposed to said radiation";
- (c) removing the uncrosslinked copolymer to develop a pattern of the crosslinked copolymer; and
- (d) etching said surface not coated with said crosslinked copolymer to transfer said pattern into said surface.
Parent Case Info
This is a divisional of application Ser. No. 08/298,450 filed on Oct. 27, 1994 which is a divisional application of Ser. No. 07/982,104 filed Nov. 24, 1992, now U.S. Pat. No. 5,736,503, which is a continuation application of 07/631,610 filed Dec. 12, 1990.
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3002003 |
Merrill et al. |
Sep 1961 |
|
3096311 |
Merrill et al. |
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3100702 |
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Divisions (2)
|
Number |
Date |
Country |
Parent |
298450 |
Oct 1994 |
|
Parent |
982104 |
Nov 1992 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
631610 |
Dec 1990 |
|