Patent ID: 8541266

Claim:
A method for manufacturing a semiconductor device, comprising the steps of: forming a gate electrode layer over a substrate; forming a first aluminum oxide layer over the gate electrode layer in a first chamber of an apparatus; forming a first silicon oxide layer over the first aluminum oxide layer in a second chamber of the apparatus; forming an oxide semiconductor layer over the first silicon oxide layer in a third chamber of the apparatus; performing a heat treatment on the oxide semiconductor layer in a fourth chamber of the apparatus; and performing an oxygen supplying treatment on the oxide semiconductor layer in a fifth chamber of the apparatus; wherein the steps of forming the first aluminum oxide layer, forming the first silicon oxide layer, forming the oxide semiconductor layer, performing the heat treatment, and performing the oxygen supplying treatment are successively performed without exposing the substrate to air, and wherein the first chamber, the second chamber, the third chamber, the fourth chamber, and the fifth chamber are connected in series.