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1. 发明授权

US5936815A Magnetic head 失效
标题翻译：磁头
公开(公告)号：US5936815A
公开(公告)日：1999-08-10
申请号：US931743
申请日：1997-09-16
申请人： Seiji Kumagai , Junichi Honda , Norikatsu Fujisawa , Kyu Kanno
发明人： Seiji Kumagai , Junichi Honda , Norikatsu Fujisawa , Kyu Kanno
IPC分类号： G11B5/31 , G11B5/127 , G11B5/187 , G11B5/23 , G11B5/147
CPC分类号： G11B5/1276 , G11B5/1878 , G11B5/127 , G11B5/1272
摘要： A thin film type magnetic head that electromagnetic conversion efficiency is improved by making gradually magnetic resistance larger with approaching to a magnetic gap can be provided. There is disclosed a magnetic head including a pair of magnetic core half members having nonmagnetic substrates and magnetic metal films formed on the nonmagnetic substrates and a coil formed at a concave part by a thin film forming process, the pair of magnetic core half members being jointed to each other opposite to each other through a magnetic gap formed between the respective magnetic metal films, the concave part formed on the surface formed by joining at least one of the magnetic metal films and the other magnetic metal film, wherein assistant cores consisting of magnetic materials are joined on the side of the surface by joining a pair of nonmagnetic substrates and the magnetic metal films are formed connected with the assistant cores.
摘要翻译：可以提供通过使接近磁隙逐渐变大的磁阻来提高电磁转换效率的薄膜型磁头。公开了一种磁头，其包括具有非磁性基板的一对磁芯半部件和形成在非磁性基板上的磁性金属膜，以及通过薄膜形成工艺在凹部形成的线圈，所述一对磁芯半体连接通过形成在各个磁性金属膜之间的磁隙彼此相对，通过接合至少一个磁性金属膜和另一个磁性金属膜形成的表面上形成的凹部，其中由磁性金属膜组成的辅助芯材料通过连接一对非磁性基底而在表面的一侧接合，并且形成与辅助芯相连接的磁性金属膜。

2. 发明授权

US5737154A Rotary magnetic head apparatus with circuitry for driving head and circuitry for transmitting output signals in noncontact fashion disposed on rotary drums 失效
标题翻译：具有用于驱动磁头的电路的旋转磁头装置和用于以非接触方式传送设置在旋转磁鼓上的输出信号的电路
公开(公告)号：US5737154A
公开(公告)日：1998-04-07
申请号：US666652
申请日：1996-06-18
申请人： Seiji Kumagai , Masatoshi Hayakawa , Hiroshi Morita , Norikatsu Fujisawa , Junichi Honda , Yuji Nakano
发明人： Seiji Kumagai , Masatoshi Hayakawa , Hiroshi Morita , Norikatsu Fujisawa , Junichi Honda , Yuji Nakano
IPC分类号： G11B5/00 , G11B5/008 , G11B5/02 , G11B5/39 , G11B5/53 , G11B15/12 , G11B33/12 , G11B5/52
CPC分类号： G11B33/121 , G11B15/125 , G11B33/122 , G11B5/0086 , G11B5/53 , G11B2005/0016 , G11B5/39
摘要： A rotary magnetic head apparatus is provided which is capable of reliably supplying DC power for driving to an active-type reproducing head provided within a rotary drum and which is capable of taking the reproductive output signal of the active-type head to the outside of the drum. The rotary magnetic head apparatus includes a fixed drum, a rotary drum which is rotatable with respect to the fixed drum, an active-type reproducing head, disposed on the rotary drum, for reproducing information from a magnetic tape, a constant-current circuit, disposed on the rotary drum, for supplying a constant current for driving the head to the active-type reproducing head, a noncontact signal transmission device for taking the reproductive output signal which is output when the active-type reproducing head reproduces information from the magnetic tape to the outside of the rotary drum, and a sliding-type contact device for supplying external DC power to the constant-current circuit.
摘要翻译：本发明提供一种旋转磁头装置，其能够可靠地将驱动用的直流电力提供给设置在旋转磁鼓内的有源型重放磁头，并且能够将主动型磁头的生殖输出信号作用于鼓。旋转磁头装置包括固定鼓，相对于固定滚筒可旋转的旋转滚筒，设置在旋转滚筒上的主动型再现头，用于从磁带再现信息，恒流电路，设置在旋转磁鼓上，用于向主动式再现头提供用于驱动磁头的恒定电流;非接触信号传输装置，用于获取当有源型再现头从磁带再现信息时输出的生殖输出信号到旋转鼓的外部，以及用于向恒流电路提供外部DC电力的滑动型接触装置。

3. 发明授权

US5475551A Magnetic head 失效
标题翻译：磁头
公开(公告)号：US5475551A
公开(公告)日：1995-12-12
申请号：US272324
申请日：1994-07-08
申请人： Junichi Honda , Seiji Kumagai , Norikatsu Fujisawa , Masatoshi Hayakawa , Masahiro Kikkawa , Miho Suzuki
发明人： Junichi Honda , Seiji Kumagai , Norikatsu Fujisawa , Masatoshi Hayakawa , Masahiro Kikkawa , Miho Suzuki
IPC分类号： G11B5/133 , G11B5/187 , G11B5/193 , G11B5/23 , G11B5/235
CPC分类号： G11B5/235 , G11B5/193
摘要： A magnetic head has a pair of magnetic core substrates formed of an oxide magnetic material, at least one of the magnetic core substrates having a gap film formed on an abutment surface thereof, the pair of magnetic core substrates being abutted to each other on the gap film as abutment surfaces, having a magnetic gap formed between them. The gap film is formed of platinum, the platinum group, or an alloy consisting mainly of platinum or the platinum group. The pair of magnetic core substrates are bonded to each other to be integrated into one unit by a non-magnetic glass. The magnetic gap has a track width of not greater than 50 .mu.m. The gap film has a thickness of not greater than 150 nm. The magnetic head includes a pair of magnetic core substrates formed of an oxide magnetic material, at least one of the magnetic core substrates having a gap film formed on an abutment surface thereof, the pair of magnetic core substrates being abutted to each other on the gap film as abutment surfaces, having a magnetic gap formed between them. The gap film is selectively formed of Cr or an alloy consisting mainly of Cr, Ti or an alloy consisting mainly of Ti, or Ta.sub.2 O.sub.5 or an oxide consisting mainly of Ta.sub.2 O.sub.5. At least one of the pair of magnetic core substrates has its abutment surface inversely sputtered and then has a gap film formed thereon.
摘要翻译：磁头具有由氧化物磁性材料形成的一对磁芯基板，所述磁芯基板中的至少一个在其邻接表面上形成有间隙膜，所述一对磁芯基板在间隙上彼此抵接膜作为邻接表面，在它们之间形成有磁隙。间隙膜由铂，铂族基团或主要由铂或铂族组成的合金形成。一对磁芯基板通过非磁性玻璃彼此结合成一个单元。磁隙具有不大于50μm的轨道宽度。间隙膜的厚度不大于150nm。磁头包括由氧化物磁性材料形成的一对磁芯基板，至少一个磁芯基板在其邻接表面上形成有间隙膜，该一对磁芯基板在间隙上彼此抵接膜作为邻接表面，在它们之间形成有磁隙。间隙膜由Cr或主要由Cr，Ti或主要由Ti或Ta2O5组成的合金或主要由Ta 2 O 5组成的氧化物组成的合金选择性地形成。所述一对磁芯基板中的至少一个具有抵靠面反向溅射，然后在其上形成间隙膜。

4. 发明授权

US5708543A Magnetic head with glass used to bond together two core halves having a coefficient of thermal expansion less than that of the ferromagnetic oxide used to make the core halves 失效
标题翻译：具有玻璃的磁头用于将具有比用于制造芯半部的铁磁性氧化物的热膨胀系数小的热膨胀系数的两个半芯
公开(公告)号：US5708543A
公开(公告)日：1998-01-13
申请号：US655673
申请日：1996-05-30
申请人： Junichi Honda , Norikatsu Fujisawa
发明人： Junichi Honda , Norikatsu Fujisawa
IPC分类号： G11B5/127 , G11B5/133 , G11B5/23 , G11B5/235
CPC分类号： G11B5/232 , Y10T29/49057
摘要： A magnetic head according to the present invention can generate excellent readout output even with a reduced track width by controlling the stress applied to the half magnetic cores from the glass. The magnetic head comprises a pair of magnetic cores made of ferromagnetic oxide, at least one of which has a groove for a coil and which are bonded together with the glass with a gap material in-between, wherein the coefficient of thermal expansion of the glass to bond magnetic cores together is smaller than that of the ferromagnetic oxide by 20.times.10.sup.-7 to 35.times.10.sup.-7 per degree Celsius.
摘要翻译：根据本发明的磁头通过控制从玻璃施加到半磁芯的应力，即使具有减小的轨道宽度也可以产生优异的读出输出。磁头包括由铁磁性氧化物制成的一对磁芯，其中至少一个磁芯具有用于线圈的槽，并且与玻璃之间间隙材料结合在一起，其中玻璃的热膨胀系数将磁芯结合在一起比铁磁性氧化物小20℃至35x10 -7 /摄氏度。

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