Nippon Telegraph and Telephone Corporation

Shigeru Moriya

Tadahito Matsuda

Tetsuyoshi Ishii

Katsuhiro Harada

A resist pattern is formed on a substrate by forming a resist on a substrate and radiating an energy beam carrying predetermined pattern information onto the resist, thereby forming a recessed pattern in a surface portion of the resist so as not to extend through the resist. A flat mask layer is formed on the resist including the recessed pattern. The mask layer is uniformly etched along a direction of thickness thereof until at least a surface of the resist is exposed to allow the mask layer to remain on at least a bottom of the recessed pattern, thereby forming a mask pattern comprising the remaining residual mask layer. Finally, the resist is etched by using the mask pattern as an etching mask.

Growing community of inventors

Isehara, Japan

Shigeru Moriya