公开(公告)号：US20040147137A1

公开(公告)日：2004-07-29

申请号：US10695798

申请日：2003-10-30

Applicant: Renesas Technology Corp.

Inventor： Atsushi Hiraiwa ,  Satoshi Sakai ,  Dai Ishikawa ,  Yoshihiro Ikeda

IPC: H01L021/31

CPC classification number: H01L21/28185 ,  H01L21/28194 ,  H01L21/28273 ,  H01L21/3105 ,  H01L21/823857 ,  H01L27/105 ,  H01L27/11521 ,  H01L27/11526 ,  H01L29/513 ,  H01L29/518 ,  H01L2924/0002 ,  H01L2924/00

Abstract: According to the present invention, an oxide film with the film quality almost equivalent to that of the thermal oxide can be formed by the low-temperature treatment. After removing an insulator on the active region of the substrate which constitutes a semiconductor wafer, an insulator made of, for example, silicon oxide is deposited on the main surface of the semiconductor wafer by the low pressure CVD method. This insulator is a film to form a gate insulator of MISFET in a later step. Subsequently, a plasma treatment is performed in an atmosphere containing oxygen (oxygen plasma treatment) to the insulator in the manner as schematically shown by the arrows. By so doing, the film quality of the insulator formed by the CVD method can be improved to the extent almost equivalent to that of the insulator formed of the thermal oxide.

Abstract translation: 根据本发明，可以通过低温处理形成膜质量几乎等于热氧化物的氧化膜。 在构成半导体晶片的基板的有源区域上去除绝缘体之后，通过低压CVD法在半导体晶片的主表面上沉积由例如氧化硅制成的绝缘体。 该绝缘体是在后续步骤中形成MISFET的栅极绝缘体的膜。 随后，按照箭头示意性地示出的方式，在含有氧的气氛（氧等离子体处理）中对绝缘体进行等离子体处理。 通过这样做，通过CVD方法形成的绝缘体的膜质量可以提高到与由热氧化物形成的绝缘体几乎相同的程度。