Patent ID: 7176484

Claim:
A method of preparing a substrate having thereon a patterned small molecule organic semiconductor layer, said method comprising: patternwise exposing a region of a substrate having thereon a film of a precursor of a small organic molecule to energy from an energy source to convert said film of a precursor of a small organic molecule to a patterned small molecule organic semiconductor layer to produce said substrate having thereon said patterned small molecule organic semiconductor layer; wherein said precursor is a Diels-Alder adduct of a polycyclic aromatic compound with a dienophile, wherein said polycyclic aromatic compound is selected from the group consisting of: oligothiophene, perylene, benzo[ghi]perylene, coronene and polyacene; and wherein said dienophile is represented by the formula: R 1 —X═Y—R 2 wherein X is N or CR 7 , or X and R 1 together form the group R 1 —X, wherein R 1 —X is selected from the group consisting of: O, S, SO and SO 2 ; wherein Y is selected from the group consisting of: N and CR 7 ; and wherein each R 1 , R 2 and R 7 is independently selected from the group consisting of: hydrogen, alkyl of 1–12 carbon atoms, aryl, substituted aryl, aralkyl, alkoxycarbonyl, aryloxycarbonyl, acyl and a group R, wherein R is selected from the group consisting of: hydrogen, alkyl of 1–12 carbon atoms, alkoxy, acyl, aryl, aralkyl, chloroalkyl, fluoroalkyl and substituted aryl having a substituent selected from the group consisting of: —F, —Cl, —Br, —NO 2 , —CO 2 R, —PO 3 H, —SO 3 H, trialkylsilyl and acyl; wherein said acyl is represented by the formula: R 8 CO— wherein R 8 is selected from the group consisting of: hydrogen, alkyl of 1–12 carbon atoms, aryl, substituted aryl, aralkyl and fluoroalkyl.