Diamines and photosensitive polyimides made therefrom
AssigneeOccidental Chemical Corporation
InventorsJerold Rosenfeld, Jin-O Choi, David Y. Tang, John Tyrell
Life of this patent
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Abstract
Disclosed is an aromatic diamine having the general formula ##STR1## where A is a group containing at least one aromatic ring, each Y is independently selected from ##STR2## R is a group containing at least one olefinically unsaturated group, R' is hydrogen, alkyl to C.sub.25, aryl, or R, n is 1 to 4, and the number of olefinic groups in Y is at least 3 when each Y is ##STR3## and otherwise is at least 2. Photosensitive polyamic acids and polyimides can be prepared from the aromatic diamines which can be crosslinked with light to a mask to form patterns on a substrate.
Claims26
An aromatic crosslinkable diamine having the general formula ##STR26## where A is a group containing at least one aromatic ring, each Y is independently selected from the group consisting of ##STR27## R is a group containing at least one olefinically unsaturated group, R' is hydrogen, alkyl to C.sub.25, aryl, or R, n is 1 to 4, and the number of olefinic groups in each Y is at least 3 when each Y is ##STR28## and otherwise is at least 2.
A polyamic acid having the repeating units ##STR33## where A is a trivalent group containing at least one aromatic ring, each B is independently selected from a tetravalent group containing at least one aromatic ring, D is a siloxane-containing divalent group, E is a divalent group that does not contain pendant olefinic unsaturation, each Y is independently selected from the group consisting of ##STR34## R is a group containing at least one olefinically unsaturated group, R' is hydrogen, alkyl to C.sub.25, aryl, or R, n is 1 to 4, the number of olefinic groups in Y.sub.n is at least 3 when each Y is ##STR35## and otherwise is at least 2, q is a number selected such that D is 0 to 50 wt % of AYn, and r is a number selected such that E is 0 to 40 wt % of AYn.
A polyimide having the repeating units ##STR40## where A is a trivalent group containing at least one aromatic ring, B is a tetravalent group containing at least one aromatic ring, D is a siloxane-containing divalent group, E is a divalent group that does not contain pendant olefinic unsaturation, each Y is independently selected from the group consisting of ##STR41## R is a group containing at least one olefinically unsaturated group, R' is hydrogen, alkyl to C.sub.25, aryl, or R, n is 1 to 4, the number of olefinic groups in Y is at least 3 when each Y is ##STR42## and otherwise is at least 2, q is a number selected such that D is 0 to 50 wt % of AYn, and r is a number selected such that E is 0 to 40 wt % of AYn.
Dependencies are inferred from the claim text.