Patent ID: 6153341
Filing Date: 2000-11-28
Classification: G03F

Abstract:
A phase shift mask for exposure of a very fine pattern comprising:a light transmitting portion for permitting exposure light to pass therethrough, said light having an intensity capable of substantially contributing to the exposure;a light translucent portion for transmitting light having an intensity substantially not contributing to the exposure, with a boundary between said light translucent portion and said light transmitting portion;said exposure light being canceled in phase in an area adjacent to the boundary between said light translucent portion and the light transmitting portion when the exposure light passes through the light translucent portion and the light transmitting portion; andsaid light translucent portion being formed of a thin film consisting essentially of nitrogen, metal and silicon, wherein said thin film comprises 8 to 18 atomic % of metal and said metal is selected from the group consisting of molybdenum and titanium.