SUBSTRATE FOR DISPLAY DEVICE, METHOD FOR PRODUCING SAME, AND DISPLAY DEVICE

摘要

A thin film transistor substrate (20a) includes: an insulating substrate (10a); a semiconductor layer (13a) provided on the insulating substrate (10a) and having a channel region (C); and a channel protection layer (25) provided in the channel region (C). The channel protection layer (25) is made of a layered film in which first insulating films and second insulating films are layered alternately. If the refractive index of the first insulating film is Ra and the refractive index of the second insulating film is Rb, the relationship Rb/Ra=1.3 holds.