Patent ID: 7718117
Filing Date: 2010-05-18
Classification: C23C

Abstract:
1. A method of manufacturing a tungsten sputtering target, the method comprising the steps of: pressing a high purity tungsten powder to form a pressed compact; first sintering the pressed compact at a temperature of 1450-1700° C. for one hour or longer after the pressed compact is heated at a heating-up rate of 2-5° C./min on the way to a maximum sintering temperature; second sintering the pressed compact to form a sintered body at a temperature of 1900° C. or higher for 5 hours or longer; working the sintered body to obtain a shape of a target; subjecting the target to a grinding work of at least one of rotary grinding and polishing; and subjecting the target to a finishing work of at least one of etching and reverse sputtering.