Claims
- 1. A method of forming a polymer on a substrate in a predetermined pattern comprising:
- (a) coating a substrate with a prepolymer which is an ether of the oligomeric condensation product of a dihydric phenol and formaldehyde having the formula ##STR7## where the recurring unit Q has the structure, ##STR8## and n is an integer from 1 to 10;
- s is 1;
- each X is C(CF.sub.3).sub.2 ;
- each R.sub.1 and R.sub.2 is independently selected from the group consisting of hydrogen, alkyl and alkoxy moieties containing 1 to 10 carbon atoms, phenyl and phenoxy;
- a and b are independently 0 or integers from 1 to 4;
- Z is Cl or Br;
- E is selected from the group consisting of the vinylbenzyl moiety, alkyl moieties containing 1 to 10 carbon atoms, or benzyl, subject to the constraint that at least 50% of all E's are the vinylbenzyl moiety;
- (b) irradiating the coated prepolymer of (a) through a masking pattern to selectively crosslink the portion of said coating being irradiated;
- (c) selectively dissolving the non-irradiated part of the prepolymer coating of (a); and
- (d) curing the crosslinked portion of the prepolymer coating by heating at a temperature in the range of 100.degree. C. to 300.degree. C. for a time sufficient to further crosslink said crosslinked coating and to transform the prepolymer to an infusible glassy solid.
- 2. The method of Claim 1 wherein R.sub.1 and R.sub.2 are hydrogen or alkyl With 1-10 carbon atoms.
- 3. The method of Claim 2 wherein R.sub.1 and R.sub.2 are hydrogen.
- 4. The method of Claim 2 wherein R.sub.1 and R.sub.2 are methyl or t-butyl moieties.
- 5. The method of Claim 1 wherein Z is Br and a and b are 1-4.
- 6. The method of Claim 1 wherein E is an alkyl moiety having 1-10 carbon atoms.
- 7. The method of Claim 6 wherein E is an alkyl moiety having 1-4 carbon atoms.
- 8. The method of Claim 1 wherein E is benzyl.
- 9. The method of Claim 1 wherein E is at least 70-100% vinyl benzyl moieties and the remaining E's are alkyl with 1-10 carbon atoms.
- 10. The method of Claim 9 wherein E is at least 95-100% vinyl benzyl moieties and the remaining E's are alkyl with 1-10 carbon atoms.
- 11. The method of Claim 1 wherein E is at least 70% vinyl benzyl moieties and the remaining E's are propyl groups.
- 12. The method of Claim 1 wherein n is an integer from 1 to 6.
- 13. The method of Claim 1 wherein the number average of n is about 3.
- 14. The method of Claim 1 wherein the coating of (a) is soft-baked before the irradiation of (b).
- 15. The method of Claim 1 wherein the coating of (a) includes a photosensitizer or photoinitiator.
- 16. The method of Claim 1 wherein the irradiation of (b) has a wavelength of 200 to 500 nm.
Government Interests
The U.S. Government has rights in this invention under U.S. Air Force Contract F33615-89-C-5603
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4855375 |
Zupancic et al. |
Aug 1989 |
|
4908096 |
Zupancic |
Mar 1990 |
|