Novel sulfonate salts and derivatives, photoacid generators, resist compositions, and patterning process
申请人:Kobayashi Katsuhiro
公开号:US20070099113A1
公开(公告)日:2007-05-03
Sulfonate salts have the formula: CF
3
—CH(OH)—CF
2
SO
3
−
M
+
wherein M
+
is a Li, Na, K, ammonium or tetramethylammonium ion. Because of inclusion within the molecule of a hydroxyl group which is a polar group, the sulfonic acids are effective for restraining the length of acid diffusion through hydrogen bond or the like. The photoacid generators that generate these sulfonic acids perform well during the device fabrication process including coating, pre-baking, exposure, post-exposure baking, and developing steps. The photoacid generators are little affected by water left on the wafer during the ArF immersion lithography.
Sulfonate salts and derivatives, photoacid generators, resist compositions, and patterning process
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US07556909B2
公开(公告)日:2009-07-07
Sulfonate salts have the formula: CF3—CH(OH)—CF2SO3−M+ wherein M+ is a Li, Na, K, ammonium or tetramethylammonium ion. Because of inclusion within the molecule of a hydroxyl group which is a polar group, the sulfonic acids are effective for restraining the length of acid diffusion through hydrogen bond or the like. The photoacid generators that generate these sulfonic acids perform well during the device fabrication process including coating, pre-baking, exposure, post-exposure baking, and developing steps. The photoacid generators are little affected by water left on the wafer during the ArF immersion lithography.
Sulfonium salt, resist composition, and patterning process
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US08173354B2
公开(公告)日:2012-05-08
A sulfonium salt having a triphenylsulfonium cation and a sulfite anion within the molecule is best suited as a photoacid generator in chemically amplified resist compositions. Upon exposure to high-energy radiation, the sulfonium salt generates a sulfonic acid, which facilitates efficient scission of acid labile groups in chemically amplified positive resist compositions. Because of substantial non-volatility under high vacuum conditions in the EB or EUV lithography, the risk of the exposure tool being contaminated is minimized.
SULFONIUM SALT, RESIST COMPOSITION, AND PATTERNING PROCESS
申请人:OHSAWA Youichi
公开号:US20110008735A1
公开(公告)日:2011-01-13
A sulfonium salt having a triphenylsulfonium cation and a sulfite anion within the molecule is best suited as a photoacid generator in chemically amplified resist compositions. Upon exposure to high-energy radiation, the sulfonium salt generates a sulfonic acid, which facilitates efficient scission of acid labile groups in chemically amplified positive resist compositions. Because of substantial non-volatility under high vacuum conditions in the EB or EUV lithography, the risk of the exposure tool being contaminated is minimized.