ALEXANDRIA, Va., March 12 -- United States Patent no. 12,247,280, issued on March 11, was assigned to MITSUI MINING & SMELTING Co. LTD. (Tokyo).
"Metal foil with carrier" was invented by Yukiko Kitabatake (Ageo, Japan), Masahiro Koide (Ageo, Japan), Rintaro Ishii (Ageo, Japan) and Yoshinori Matsuura (Ageo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a carrier-attached metal foil which can suppress the number of foreign matter particles on the surface of a metal layer to enhance circuit formability, and can keep stable releasability even after heating at a high temperature of 240deg C. or higher (for example, 260deg C.) for a long period of time. The carrier-attached metal foil includes a...