Patent ID: 6265250
Filing Date: 2001-07-24
Classification: H01L

Abstract:
A method for forming a silicon on insulator (SOI) device, comprising:depositing an amorphous silicon film on a substrate;depositing a protective cap layer on said amorphous silicon film;forming a plurality of protective stacks on the film, the forming of the stacks comprising:depositing a photoresist layer on the protective cap layer,removing corresponding portions of both the photoresist layer and the protective cap layer to establish a plurality of stack windows,removing the remaining portions of the photoresist layer, removing corresponding portions of the amorphous silicon film,depositing an oxide material to at least fill the plurality of stack windows, polishing the oxide material down to the remaining portions of the protective cap layer, andremoving the protective cap layer, thereby establishing a plurality of active region windows over a plurality of exposed film portions between each protective stack; andannealing the plurality of exposed film portions by directing and pulsing laser energy through the plurality of active region windows against the plurality of exposed film portions in a temperature range of at least nine hundred degrees Celsius (.gtoreq.900.degree. C.) for a duration of a few nanoseconds.thereby melting said amorphous silicon film to recrystallize the exposed film portions, andthereby forming a plurality of active regions comprising a plurality of recrystallized exposed film portions.