Patent ID: 6420760
Filing Date: 2002-07-16
Classification: H01L

Abstract:
A thin film transistor comprising:a semiconductor thin film formed on a transparent substrate; a first insulation film having refractive index n1 and film thickness d1 formed on said semiconductor thin film; a gate electrode formed on said first insulation film; dopant implanted into said semiconductor thin film; and a second insulation film having refractive index n2 and film thickness d2 formed in a way to cover said first insulation film and said gate electrode; wherein said film thicknesses d1 and d2 satisfy a set of the Formulae (1) and (2) when m and m1 are any given positive integers: d2*n2=2*m*&lgr;/4â€ƒâ€ƒ(1); and d1*n1+d2*n2=(2*m1âˆ’1)*&lgr;/4â€ƒâ€ƒ(2), and are of sufficient thickness to cause said laser to be reflected off of the gate electrode and to be absorbed by said thin film transistor away from said gate electrode.