Patent ID: 7256102
Filing Date: 2007-08-14
Classification: H01L

Abstract:
1. A method of manufacturing a thin film device substrate; comprising the steps of: forming, on a first substrate, a heat insulating film to hinder heat conduction; forming a semiconductor film on said heat insulating film; applying laser annealing to said semiconductor film; forming a thin film device with said semiconductor film which has been subjected to the laser annealing; bonding a second substrate onto said thin film device; and peeling off said first substrate and said heat insulating film from a layered structure between said first substrate and said second substrate inclusive, wherein, said heat insulating film is a film having a gap space, said gap space is formed by means of etching, and the step of forming a heat insulating film on a first substrate comprising the steps of: forming, on said first substrate, a primary film in which said gap space is to be formed in a subsequent step; forming, in a film formed on said primary film, a large number of through holes to reach said primary film; and supplying an etchant from said through holes and thereby forming said gap space in said primary film.