Patent ID: 9343586
Filing Date: 2016-05-17
CPC Classification: C23C,H01L

Claim Text:
1. A thin film transistor, comprising; a gate electrode, a gate insulating film, an oxide semiconductor layer, a source-drain electrode, and a passivation film configured to protect the source-drain electrode, on a substrate in this order, wherein 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, Zn, Sn, 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; and 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 atomic %; Ga: larger than or equal to 5 atomic %; Zn: larger than or equal to 35 atomic % and smaller than or equal to 65 atomic %; and Sn: larger than or equal to 8 atomic % and smaller than or equal to 30 atomic %.