Patent ID: 8039838

Claim:
A method for making self-aligned silicon thin film transistors comprising: providing a generally flexible substrate; patterning a barrier material on at least a portion of the flexible substrate; forming at least one silicon assembly on at least a portion of the barrier material, each silicon assembly comprising silicon; depositing a dielectric material to form a gate dielectric on at least a portion of the at least one silicon assembly; depositing a gate electrode material on at least a portion of the dielectric material; selectively patterning the gate electrode material and the dielectric material to form at least one transistor assembly; selectively doping areas of the at least one transistor assembly, thereby forming a source and a drain by: introducing a doping material to the at least one transistor assembly, laser annealing pre-selected portions of the silicon assembly such that at least some doping material is transferred into the silicon, and removing any excess doping material not transferred into the silicon to form a self-aligned silicon thin film transistor.