Photosensitive polymides

A photosensitive polyimide having a structure represented by formula (I):

• wherein
• B and D are the same or different, and each independently is a divalent organic group;
• A is selected from the group consisting of:
• wherein
• R′ is a group selected from:
• wherein R is a vinyl-containing unsaturated group or a group selected from:
• wherein
• R1 is a substituted or unsubstituted C1-C20 saturated or unsaturated organic group;
• and
• R2 is a vinyl-containing unsaturated group;
• R13 is —CH2—, —O—, —S—, —CO—, —SO2—, —C(CH3)2— or —C(CF3)2—;
• R14 is —H or —CH3—;
• X is —O—, —NH— or —S—;
• J is a tetravalent organic group without a modifying group R′, n is an integer of greater than 0, and m is an integer of greater than 0,