申请人:——
公开号:US20030143480A1
公开(公告)日:2003-07-31
Provided is a polybenzoxazole precursor having a high purity which does not contain ionic by-products. The above polybenzoxazole precursor comprises a repetitive unit represented by Formula (1):
1
wherein A
1
represents a tetravalent aromatic group; N and OH which are bonded to A
1
are paired, and the respective pairs of N and OH are bonded to carbons which are adjacent to each other on the same aromatic ring; A
2
represents a divalent organic group; and n represents a number of 2 to 300.
本发明提供了一种不含离子副产物的高纯度聚苯并恶唑前体。上述聚苯并恶唑前体包括由式(1)表示的重复单元:
1
其中 A
1
代表四价芳香族基团;N 和 OH 与 A
1
成对,且 N 和 OH 分别与同一芳香环上相邻的碳键合;A
2
代表二价有机基团;n 代表 2 至 300 之间的数字。