Patent ID: 9249032
Filing Date: 2016-02-02
CPC Classification: C01G,C01P,C03C,C23C,H01L

Claim Text:
1. An amorphous semiconductor thin film, comprising an amorphous oxide thin film containing amorphous oxide, the amorphous semiconductor thin film being amorphous and being obtained by exposing the amorphous oxide thin film to an oxygen plasma generated by exciting an oxygen-containing gas in high frequency, the oxygen plasma being generated under conditions that applied frequency is 1 kHz or more and 300 MHz or less, and pressure is 5 Pa or more and 0.1 MPa or less, wherein the amorphous oxide thin film is a thin film containing indium oxide as a main component, and the amorphous oxide thin film additionally contains positive trivalent metal oxide other than indium oxide, and wherein the positive trivalent metal oxide is at least one or more of metal oxides selected from boron oxide, aluminum oxide, scandium oxide, yttrium oxide, lanthanum oxide, neodymium oxide, samarium oxide, europium oxide, gadolinium oxide, dysprosium oxide, holmium oxide, erbium oxide, thulium oxide, ytterbium oxide and lutetium oxide.