Patent ID: 8357483

Claim:
A photosensitive resin composition that includes a polymer as an alkali soluble resin, the polymer being produced by using a method comprising: 1) polymerizing ethylenically unsaturated monomers including an aromatic vinyl and an unsaturated imide by using a thermal polymerization initiator and a molecular weight controlling agent that is a thiol compound having a carboxylic acid structure at an end thereof according to a thermal polymerization process to obtain a product having an acidic group at an end thereof; 2) reacting the product having the acidic group at the end thereof that is obtained in step 1 above and a methacryl or acryl monomer having an epoxy structure at an end thereof with each other to prepare a macromonomer; and 3) polymerizing the macromonomer that is obtained in step 2 above and a monomer having an acidic group.