| abstract |
An oxide sintered body containing In, Ga, Sn, and Zn in an atomic ratio included in the following regions (A) and (B). Area (A) 0.38 ≦ In / (In + Ga + Sn) <0.70 0.05 <Ga / (In + Ga + Sn) <0.40 0.20 <Sn / (In + Ga + Sn) ≦ 0.50 0.00 ≦ Zn / (In + Ga + Sn + Zn) <0.05 Region (B) 0.25 ≦ In / (In + Ga + Sn) <0.69 0.20 ≦ Ga / (In + Ga + Sn) ≦ 0.55 0.11 <Sn / (In + Ga + Sn) ≦ 0.20 0.00 ≦ Zn / (In + Ga + Sn + Zn) <0.05 |