Patent ID: 7851789

Claim:
A photosensitive resin composition for a pad protective layer, comprising: (A) an alkali soluble resin, (B) a reactive unsaturated compound, (C) a photoinitiator, and (D) a solvent, wherein the (A) alkali soluble resin includes a copolymer including about 5 to about 50 wt % of a unit represented by Chemical Formula 1, about 1 to about 25 wt % of a unit represented by Chemical Formula 2, and about 45 to about 90 wt % of a unit represented by Chemical Formula 3, and wherein the total weight of the units represented by Chemical Formulae 2 and 3 is greater than 70 wt %: wherein in the above Formula 1, R 11 , R 12 , and R 13 are each independently selected from the group consisting of hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl; wherein in the above Formula 2, R 21 , R 22 , and R 23 are each independently selected from the group consisting of hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl, each R 24 is independently selected from the group consisting of substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, and substituted or unsubstituted alkoxy, and n 24 is an integer ranging from 0 to 5; and wherein in the above Formula 3, R 31 , R 32 , and R 33 are each independently selected from the group consisting of hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl, and R 34 is selected from the group consisting of substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl.