Patent ID: 9202926
Filing Date: 2015-12-01
Classification: H01L

Abstract:
1. A thin film transistor comprising at least; a gate electrode, a gate insulating film, an oxide semiconductor layer, a source-drain electrode, and a passivation film to protect the source-drain electrode, on a substrate in this order, the oxide semiconductor layer is a laminate comprising: a first oxide semiconductor layer consisting of In, Ga, Zn, Sn, and O; and a second oxide semiconductor layer consisting of In, Ga, Zn, and O, wherein the second oxide semiconductor layer is formed on the gate insulating film; the first oxide semiconductor layer is formed between the second oxide semiconductor layer and the passivation film; the contents of respective metal elements relative to the total amount of all the metal elements other than oxygen in the first oxide semiconductor layer are; In: smaller than or equal to 25 atomic % (excluding 0%); Ga: larger than or equal to 5 atomic %; Zn: larger than or equal to 30.0 atomic % and smaller than or equal to 60.0 atomic %; Sn: larger than or equal to 8 atomic % and smaller than or equal to 30 atomic %.