申请人:Siemens Aktiengesellschaft
公开号:US06120970A1
公开(公告)日:2000-09-19
The polybenzoxazole and polybenzothiazole precursors of the invention have the following partial structure: ##STR1## where: A.sup.1 to A.sup.7 are--independently of one another--H, F, CH.sub.3, CF.sub.3, OCH.sub.3, OCF.sub.3, CH.sub.2 CH.sub.3, CF.sub.2 CF.sub.3, OCH.sub.2 CH.sub.3 or OCF.sub.2 CF.sub.3 ; T is O or S, and m is 1; Z is a carbocyclic or heterocyclic aromatic radical.
本发明的聚苯并噁唑和聚苯并噻唑前体具有以下部分结构:##STR1##其中:A.sup.1至A.sup.7是独立的,可以是H,F,CH.sub.3,CF.sub.3,OCH.sub.3,OCF.sub.3,CH.sub.2 CH.sub.3,CF.sub.2 CF.sub.3,OCH.sub.2 CH.sub.3或OCF.sub.2 CF.sub.3;T为O或S,m为1;Z是一个碳环或杂环芳基。