发明名称 |
METHOD OF PRODUCING A CORE FOR MAGNETIC HEAD |
摘要 |
A core for magnetic head, which has a surface roughness of not higher than 2 mu m in the side wall of a groove for defining the track width of the core, can be obtained by subjecting at least a portion, which defines the track width, of a gapped bar made of ferrite and having a coil turn hole and a magnetic gap, to a laser-induced etching under a condition that a laser light having a power of 50-1,100 mW and a focused beam diameter of not larger than 20 mu m is irradiated to at least the track width-defining portion at a scanning speed of 2-110 mu m/sec in a halogen gas- or halide gas-containing atmosphere kept to a gas pressure of 10-200 Torr. |
申请公布号 |
KR920004216(B1) |
申请公布日期 |
1992.05.30 |
申请号 |
KR19870003142 |
申请日期 |
1987.04.02 |
申请人 |
DS SCANNER CO., LTD.;NIPON GAISI CO., LTD. |
发明人 |
NAKATOMO, SHOHAY;DAKAI, MIKIO;SANDAIJI, HIDETO;OHARA, SHOJI |
分类号 |
G11B5/133;G11B5/193;(IPC1-7):G11B5/42 |
主分类号 |
G11B5/133 |
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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