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US 8,932,801 B2Granted
Photosensitive polyimides
AssigneeEternal Chemical Co., Ltd.
InventorsMeng-Yen Chou, Chuan Zong Lee
Life of this patent
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Abstract
The present invention relates to an isocyanate-modified photosensitive polyimide. The photosensitive polyimide of the invention possesses excellent heat resistance, chemistry resistance, and flexibility, and can be used as a liquid photo resist or dry film resist, or used in a solder resist, coverlay film, or printed wiring board.
Claims18
A photosensitive polyimide of the following(I):
- wherein:
- A and C can be the same or different and each represent a tetravalent organic group;
- B represents a divalent organic group containing at least one of the following radicals;
- with the proviso that B does not comprise
- where R represents either a vinyl-group containing unsaturated radical or a radical of the following:
- wherein R1 represents a substituted or unsubstituted C1-C20 saturated or unsaturated organic radical, and
- R2 represents a vinyl-group containing unsaturated radical;
- D represents a divalent organic group;
- n is an integer of more than 0;
- and
- m is an integer of 0 or more.
8 more elements
A photosensitive polyimide of the following formula (I):
- wherein:
- A and C can be the same or different and each represent a tetravalent organic group;
- B represents a divalent organic group containing the radical;
- where R represents a radical of the following:
- wherein R1 represents a substituted or unsubstituted C1-C20 saturated or unsaturated organic radical, and
- R2 represents a vinyl-group containing unsaturated radical;
- D represents a divalent organic group;
- n is integer of more than 0;
- and
- m is an integer of 0 or more.
7 more elements
A photosensitive polyimide of the following formula (I):
- wherein:
- A and C can be the same or different and each represent a tetravalent organic group;
- B represents a divalent organic group containing the following radical:
- where R represents a radical of the following:
- wherein R1 represents a substituted or unsubstituted C1-C20 saturated or unsaturated organic radical, and
- R2 represents a vinyl-group containing unsaturated radical;
- D represents a divalent organic group;
- n is an integer of more than 0;
- and
- m is an integer of 0 or more.
7 more elements
Dependencies are inferred from the claim text.