Patent ID: 8377743

Claim:
A method of annealing an amorphous metal oxide on a temperature sensitive substrate formation comprising the steps of: providing a temperature sensitive substrate formation; forming a spacer layer on a surface of the temperature sensitive substrate formation; forming a metal oxide semiconductor device on the spacer layer, the device including at least a layer of amorphous metal oxide semiconductor material, an interface of the amorphous metal oxide layer with a dielectric layer, and a contact metal layer adjacent the layer of amorphous metal oxide semiconductor material and the interface; and improving the mobility and operating stability of the amorphous metal oxide semiconductor material while retaining at least the amorphous metal oxide semiconductor material adjacent the contact metal layer amorphous by at least partially annealing the layer of amorphous metal oxide semiconductor material by heating the adjacent contact metal layer with pulses of infra red radiation, the pulses being produced by pulsing an infra-red laser to produce breaks or intervals between radiation or pulses of heating, the intervals being longer than the pulses of heating.