CIRCUIT BOARD, DISPLAY DEVICE, AND METHOD FOR PRODUCING CIRCUIT BOARD

摘要

The disclosed circuit board (1) is provided with a plurality of transistor elements on the same insulating substrate (2); at least one of the abovementioned plurality of transistor elements is an oxide TFT (10) provided with an oxide semiconductor as a channel layer (11); at least one other of the abovementioned plurality of transistor elements is an a-SiTFT (20) that is provided with an amorphous silicon semiconductor as a channel layer (21) and that has a different purpose in the circuit from the oxide TFT (10); the oxide TFT (10) is a top-gate transistor; and the a-SiTFT (20) is a bottom-gate transistor. As a result, provided are: a structure that can increase the performance of the circuit board to which TFTs having different roles in the circuit are mounted and can reduce the area needed for mounting the TFTs; and a method for producing same.