SULFONIUM SALT, ACID GENERATOR, RESIST COMPOSITION, PHOTOMASK BLANK, AND PATTERNING PROCESS
申请人:OHASHI Masaki
公开号:US20100143830A1
公开(公告)日:2010-06-10
A sulfonium salt has formula (1) wherein R
1
is a monovalent hydrocarbon group except vinyl and isopropenyl, R
2
, R
3
, and R
4
are alkyl, alkenyl, oxoalkyl, aryl, aralkyl or aryloxoalkyl or may bond together to form a ring with the sulfur atom, and n is 1 to 3. A chemically amplified resist composition comprising the sulfonium salt is capable of forming a fine feature pattern of good profile after development due to high resolution, improved focal latitude, and minimized line width variation and profile degradation upon prolonged PED.
Sulfonium salt, acid generator, resist composition, photomask blank, and patterning process
申请人:Ohashi Masaki
公开号:US08394570B2
公开(公告)日:2013-03-12
A sulfonium salt has formula (1) wherein R1 is a monovalent hydrocarbon group except vinyl and isopropenyl, R2, R3, and R4 are alkyl, alkenyl, oxoalkyl, aryl, aralkyl or aryloxoalkyl or may bond together to form a ring with the sulfur atom, and n is 1 to 3. A chemically amplified resist composition comprising the sulfonium salt is capable of forming a fine feature pattern of good profile after development due to high resolution, improved focal latitude, and minimized line width variation and profile degradation upon prolonged PED.