Patent ID: 7229588

Claim:
A method of preparing a precious metal magnetic sputtering target comprising a multiphase alloy comprising Pt and a master alloy comprising Co and at least 2 atomic % of at least one element selected from the group consisting of Cr, B, Ta, Nb, C, Mo, W, Zr, Zn, Cu, Hf, O, Si and N, the method comprising the steps: a) providing a rapidly solidified master alloy comprising Co and at least 2 atomic % of at least one element selected from the group consisting of Cr, B, Ta, Nb, C, Mo, W, Zr, Zn, Cu, Hf, O, Si, and N; b) mechanically alloying Pt powder with the master alloy comprising Co to form a mechanically alloyed sputtering target material; and c) densifying the mechanically alloyed sputtering target material from step b) at a pressure ranging from 15,000 psi to 30,000 psi and at temperatures ranging from 1500°to 1900° F. for 1–6 hours.