Three dimensional CMOS integrated circuits on large grain polysilicon films

In this paper, we report high performance three-dimensional (3-D) CMOS integrated circuits. The first layer of transistors is fabricated on Silicon-on-Insulator (SOI) and second layer is fabricated on large-grain polysilicon-on-insulator (LPSOI) film, with oxide as the interlayer dielectric. The LPSOI film is formed by the re-crystallization of amorphous silicon through metal-induced lateral crystallization (MILC) at an elevated temperature. Compared with the conventional 2-D CMOS SOI low-voltage circuit, 3D circuit shows significant reduction in circuit area, shorter propagation delay and lower dynamic power consumption.