US Patent Issued to FUJIFILM on May 5 for "Method for producing actinic ray-sensitive or radiation-sensitive resin composition, pattern forming method, method for producing electronic device, and method for producing onium salt" (Japanese Inventors)

ALEXANDRIA, Va., May 5 -- United States Patent no. 12,619,152, issued on May 5, was assigned to FUJIFILM Corp. (Tokyo).

"Method for producing actinic ray-sensitive or radiation-sensitive resin composition, pattern forming method, method for producing electronic device, and method for producing onium salt" was invented by Taro Miyoshi (Shizuoka, Japan) and Shuhei Yamaguchi (Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for producing an actinic ray-sensitive or radiation-sensitive resin composition, the method including passing a solution including an acid compound having a pKa of 2.0 or more through a column packed with an ion-exchange resin, producing an onium salt by using the acid...