Patent ID: 9647014
Date: 2017-05-09
CPC Classifications: H01L

Claim:
1. A preparing method of a complementary thin film transistor driving back plate, comprising: forming a lower electrode on a base substrate; sequentially disposing a continuously grown dielectric layer, a semiconductor layer, and a diffusion protection layer; forming a no-photoresist region, an N-type thin film transistor preparation region, and a P-type thin film transistor preparation region; removing a photoresist layer of the N-type thin film transistor preparation region while remaining a photoresist layer of the P-type thin film transistor preparation region; removing the diffusion protection layer of the N-type thin film transistor preparation region while remaining the diffusion protection layer of the P-type thin film transistor preparation region; removing the photoresist layer in the P-type thin film transistor preparation region, and forming a P-type thin film transistor with a P-type active layer; performing an oxidation treatment to the base substrate, and forming an N-type thin film transistor with an N-type active layer; disposing a passivation layer on the base substrate; and forming an upper electrode on the passivation layer.