b626bc89_tsugi_JP___Patent_applications__Description
[Patent application number] 20130292670 [Published] 11-07-2013 [Description] 
FIELD EFFECT TRANSISTOR - It is an object to provide a low-cost oxide semiconductor material which is excellent in controllability of the carrier concentration and stability, and to provide a field effect transistor including the oxide semiconductor material. An oxide including indium, silicon, and zinc is used as the oxide semiconductor material. Here, the content of silicon in the oxide semiconductor film is greater than or equal to 4 mol % and less than or equal to 8 mol %. The field effect transistor including such an In—Si—Zn—O film can withstand heat treatment at a high temperature and is effective against −BT stress.
Kengo Akimoto, Atsugi JP - Patent applications