发明名称 |
Tungsten target for sputtering and method for preparing thereof |
摘要 |
A tungsten powder having a powder specific surface of 0.4 m2/g or more is hot-pressed at a temperature of 1,600° C. or more and then subjected to HIP at a temperature of 1,700° C. or more without capsuling, whereby a tungsten target for sputtering is manufactured that has a relative density of 99% or more and an average crystal grain size of 100 mum or less. This manufacturing method can manufacture, stably at a low cost, a tungsten target having such a high density and fine crystal structure as cannot be attained by the conventional pressure sintering method, and can greatly decrease the number of particle defects on a film produced by using such a target.
|
申请公布号 |
US6582535(B1) |
申请公布日期 |
2003.06.24 |
申请号 |
US20010980932 |
申请日期 |
2001.12.05 |
申请人 |
NIKKO MATERIALS COMPANY, LIMITED |
发明人 |
SUZUKI SATORU;MIYASHITA HIROHITO |
分类号 |
B22F3/15;B22F1/00;C22C1/04;C23C14/34;(IPC1-7):C21D1/00;F27B14/00;F27B9/12;H05B1/00 |
主分类号 |
B22F3/15 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|