Patent ID: 7564053

Claim:
An organic thin film transistor comprising: a substrate; a gate electrode; a photo-reactive polymeric gate insulating layer comprising: poly (vinyl) phenol represented by the following chemical formula I: where n is ten or more; and a photo-reactive material of 0.1% or more based on weight of poly (vinyl) phenol admixed with the poly(vinyl) phenol to form the photo-reactive organic polymeric gate insulator layer as a single layer wherein the photo-reactive material is selected from a group consisting of 2,6-bis(4-azidobenzylidene)cyclohexanone; 2,6-bis(4-azidobenzylidene)-4-methylcyclohexanone; 4,4-diazidostilbene-2,2′-disulfonic acid disodium salt; ammonium dichromate; 2-methyl-1-[4-(methylthio)phenyl]-2-(4-morpholinyl)-1-propanone; 2-methyl-1[4-(methylthio)phenyl]-2-morpholinopropane-1-one; 2-hydroxy-2-methyl-1-phenyl-propane-1-one; a mixed initiator of 50 wt % of 1-hydroxy-cyclohexyl-phenyl-ketone and 50 wt % of benzophenone; a mixed initiator of 20 wt % of 1-hydroxy-cyclohexyl-phenyl-ketone and 80 wt % of 2-hydroxy-2-methyl-1-phenyl-propane-1-one; 2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methyl-1-propanone; methylbenzoylformate; alpha, alpha-dimethoxy-alpha-phenylacetophenone; 2-benzyl-2-(dimethylamino)-1-[4-(4-morpholinyl)phenyl]-1-butanone; a mixed initiator of 30 wt % of 2-benzyl-2-(dimethylamino)-1-[4-(4-morpholinyl)phenyl]-1-butanone and 70 wt % of 2,2-dimethoxy-1,2-diphenylethan-1-one; diphenyl (2,4,6-trimethylbenzoyl)-phosphine oxide; a mixed initiator of 50 wt % of diphenyl (2,4,6-trimethylbenzoyl)-phosphine oxide and 50 wt % of 2-hydroxyl-2-methyl-1-phenyl-propane-1-one; a phosphine oxide; bis (2,4,6-trimethylbenzoyl)-phenylphosphineoxide; a mixed initiator of 5 wt % of bis (2,4,6-trimethylbenzoyl)-phenyiphosphineoxide and 95 wt % of 2-hydroxy-2-methyl-1-phenyl-propane-1-one; a mixed initiator of 10 wt % of bis (2,4,6-trimethylbenzoyl)-phenyiphosphineoxide and 9 wt % of 2-hydroxy-2-methyl-1-phenyl-propane-1-one; a mixed initiator of 20 wt % of bis (2,4,6-trimethylbenzoyl)-phenyiphosphineoxide and 80 wt % of 2-hydroxy-2-methyl-1-phenyl-propane-1-one; bis(etha 5-2,4-cyclopentadiene-1-yl)bis[2,6-difluoro-3-(1H-pyrrole-1-yl)phenyl] titanium; and a mixed initiator of benzophenone; an organic active layer; and source and drain electrodes.