发明公开
- 专利标题： Magnetic head and producing method of the same
- 专利标题（中）： Magnetkopf und Herstellungsverfahren。
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申请号： EP94115437.9申请日： 1994-09-30
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公开(公告)号： EP0646907A3公开(公告)日： 1996-10-09
- 发明人: Honma, Yoshiyasu , Masaki, Ken , Takahashi, Ken
- 申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- 申请人地址： 1006, Oaza Kadoma Kadoma-shi, Osaka-fu, 571 JP
- 专利权人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- 当前专利权人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- 当前专利权人地址： 1006, Oaza Kadoma Kadoma-shi, Osaka-fu, 571 JP
- 代理机构： Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät
- 优先权： JP247901/93 19931004; JP307845/93 19931208; JP235705/94 19940929
- 主分类号： G11B5/127
- IPC分类号： G11B5/127 ; G11B5/187
摘要：
A magnetic head can be made by:
a first step of butting projection end faces of a pair of magnetic cores (11,12) each of which is previously machined into a convex shape, through a magnetic gap member (1);
a second step of forming notches (14a,14b) which reach a winding groove (21), at said butted projection end faces of said magnetic cores by an electric discharge machining process, thereby regulating a track width (Tw); and
a third step of filling under heat treatment glass (15,16) into grooves (17a,18a) at two sides of said pair of convex magnetic cores and said notches . When the magnetic head is used, a magnetic recording/reproduction apparatus which is suitable for high density recording such as a digital VTR is provided.
a first step of butting projection end faces of a pair of magnetic cores (11,12) each of which is previously machined into a convex shape, through a magnetic gap member (1);
a second step of forming notches (14a,14b) which reach a winding groove (21), at said butted projection end faces of said magnetic cores by an electric discharge machining process, thereby regulating a track width (Tw); and
a third step of filling under heat treatment glass (15,16) into grooves (17a,18a) at two sides of said pair of convex magnetic cores and said notches . When the magnetic head is used, a magnetic recording/reproduction apparatus which is suitable for high density recording such as a digital VTR is provided.
公开/授权文献
- EP0646907B1 Magnetic head and producing method of the same 公开/授权日：1999-12-01
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