ALEXANDRIA, Va., July 23 -- United States Patent no. 12,368,049, issued on July 22, was assigned to DISCO Corp. (Tokyo).
"Protective film agent and processing method of workpiece" was invented by Sho Osawa (Tokyo), Senichi Ryo (Tokyo) and Yukinobu Ohura (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a protective film agent with which a workpiece is coated when the workpiece is processed. The protective film agent includes a water-soluble resin, a light absorbing agent having a flavone structure, a flavonol structure, or an isoflavone structure, and a solvent that dissolves the resin and the light absorbing agent."
The patent was filed on Sept. 6, 2022, under Application No. 17/929,7...