Patent
1982-02-22
1985-04-30
Corbin, John K.
G02F 113
Patent
active
045140430
ABSTRACT:
The invention relates to a method for the preparation of orientation layers for liquid crystal displays wherein a solution of an organic prepolymer is applied to a transparent substrate, and the prepolymer is then annealed to result in the desired polymer, which is then subjected to an orientation treatment, and has the objective to develop a method of this type in such a manner that it is possible to prepare orientation layers which can be highly stressed thermally and are dimensionally stable, i.e., are not subject to changes of morphological structure even at temperatures of .gtoreq.420.degree. C. For this purpose, the invention employs prepolymers of polyquinazoline diones or polyisoindoloquinazoline diones. The method according to the invention is suited in particular for the preparation of orientation layers for glass solder, liquid crystal displays.
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Ahne Hellmut
Kruger Hans
Rubner Roland
Corbin John K.
Gallivan Richard F.
Siemens Aktiengesellschaft
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