发明名称 |
Methods for marking a sintered product and for fabricating magnetic head substrate |
摘要 |
A marking method for a sintered product of the invention includes forming a concave portion on the sintered product by irradiating the sintered product with laser light thereby to write identification information on the sintered product. The depth of the concave portion is adjusted in a range between 0.1 mum and 5 mum, inclusive.
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申请公布号 |
US6449123(B1) |
申请公布日期 |
2002.09.10 |
申请号 |
US20000621813 |
申请日期 |
2000.07.21 |
申请人 |
SUMITOMO SPECIAL METALS CO., LTD. |
发明人 |
TSUJIMOTO SHINJI;MORIKAWA TAKAYUKI |
分类号 |
B41M5/24;C04B35/117;C04B41/53;C04B41/91;G11B5/10;G11B5/31;G11B33/10;(IPC1-7):G11B5/147 |
主分类号 |
B41M5/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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