Patent ID: 7344927

Claim:
A manufacturing method of an active matrix device including a top gate type TFT, which comprises a process of forming the top gate type TFT, wherein the process of forming the top gate type TFT includes the steps of: forming an oxide film specifically on a substantially entire inner wall of a CVD processing chamber, wherein the oxide film is selected from the group consisting of Al 2 O 3 , TiO 2 , Al 2 (Si 2 O 5 )(OH) 4 , MgAl 2 O 4 , TaOx, ZrOx; arranging a substrate having source and drain electrodes formed therein in the processing chamber; doping the source and drain electrodes with P; forming an a-Si layer and a gate insulating film in the CVD processing chamber, wherein the step of doping the source and drain electrodes with P and the step of forming the a-Si layer and the gate insulating film are carried out in-situ in the CVD processing chamber; and wherein forming the oxide film specifically on the substantially entire inner wall of the CVD processing chamber is performed before doping the source and drain electrodes with P.