ALEXANDRIA, Va., Feb. 12 -- United States Patent no. 12,220,785, issued on Feb. 11, was assigned to DISCO Corp. (Tokyo).
"Chuck table and grinding method of workpieces" was invented by Keisuke Nakano (Tokyo) and Ryo Shimazu (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Multiple holding surfaces of a chuck table are disposed in such a manner that the heights thereof from a reference surface are in increasing order along a first direction parallel to each of them. Thus, in a case of using this chuck table, creep-feed grinding for workpieces each held by a respective one of the multiple holding surfaces can be executed in states in which a grinding unit is positioned at different heights. In this case, ...