公开(公告)号：US5270894A

公开(公告)日：1993-12-14

申请号：US28171

申请日：1993-03-09

申请人： Horiyuki Okuda ,  Isao Tanaka ,  Jyoichi Tamada ,  Kazuo Ino ,  Takashi Ogura ,  Fumio Kameoka ,  Kouzo Ishihara

发明人： Horiyuki Okuda ,  Isao Tanaka ,  Jyoichi Tamada ,  Kazuo Ino ,  Takashi Ogura ,  Fumio Kameoka ,  Kouzo Ishihara

IPC分类号： G11B5/187 ,  G11B5/31 ,  G11B5/23

CPC分类号： G11B5/1874 ,  G11B5/1878

摘要： A parallel type MIG (Metal in Gap) magnetic head includes single-crystal ferrite core halves with a thin ferromagnetic film formed on the gap-forming face of at least one of the core halves. The core halves are joined together using a glass having an Fe content in the range of 2-13 at %. The crystalline geometry of the principal magnetic path forming faces and gap forming faces of the core halves is selected to minimize the pseudo-gap problem and to improve reproduction output.

摘要翻译： 平行式MIG（金属间隙）磁头包括形成在至少一个芯半部的间隙形成面上的薄铁磁膜的单晶铁氧体磁芯半部。 使用Fe含量在2-13at％范围内的玻璃将核心半部连接在一起。 选择主磁路形成面和芯半部的间隙形成面的结晶几何形状以最小化伪间隙问题并提高再现输出。

公开(公告)号：US5218500A

公开(公告)日：1993-06-08

申请号：US813751

申请日：1991-12-31

申请人： Hiroyuki Okuda ,  Isao Tanaka ,  Jyoichi Tamada ,  Kazuo Ino ,  Takashi Ogura ,  Fumio Kameoka ,  Kouzo Ishihara

发明人： Hiroyuki Okuda ,  Isao Tanaka ,  Jyoichi Tamada ,  Kazuo Ino ,  Takashi Ogura ,  Fumio Kameoka ,  Kouzo Ishihara

IPC分类号： G11B5/187

CPC分类号： G11B5/1878 ,  G11B5/1874

摘要： With a view to solving the problem of "pseudo-gap" in a parallel type MIG head and to improving its reproduction output, effective combinations of the principal magnetic path forming face and the gap-forming face were determined empirically for the case of using a single-crystal ferrite core material. The improved magnetic head comprises a pair of magnetic core halves made of a single-crystal ferrite, at least one of said magnetic core halves having a thin ferromagnetic metal film formed on the gap-forming face, and said thin ferromagnetic metal film abutting against the other magnetic core half with a non-magnetic material being interposed to form a magnetic gap, the improvement wherein the principal magnetic path forming face of the magnetic core half provided with said thin ferromagnetic metal film has a crystal plane generally designated {211} whereas a vector A that is parallel to the crystal axis in said principal magnetic path forming face and that is directed away from the gap-forming face forms an angle .theta. of the range 0.degree.-60.degree. or 150.degree.-180.degree. with a vector B that is parallel to the intersection of the principal magnetic path forming face and the gap-forming face and that approaches the face opposite to a recording medium.

公开(公告)号：US5155645A

公开(公告)日：1992-10-13

申请号：US611574

申请日：1990-11-13

申请人： Tsukasa Shimizu ,  Yoshiaki Shimizu ,  Jyoichi Tamada ,  Hiroyuki Okuda ,  Takao Yamano ,  Kazuo Ino ,  Koso Ishihara ,  Takashi Ogura

发明人： Tsukasa Shimizu ,  Yoshiaki Shimizu ,  Jyoichi Tamada ,  Hiroyuki Okuda ,  Takao Yamano ,  Kazuo Ino ,  Koso Ishihara ,  Takashi Ogura

IPC分类号： G11B5/187

CPC分类号： G11B5/1877

摘要： A magnetic head has a pair of magnetic core halves opposed to each other with a non-magnetic material posed therebetween to form a magnetic gap, which head includes a pair of magnetic core halves, a first ferromagnetic metal thin film and a second ferromagnetic metal thin film. The magnetic core halves are formed of ferromagnetic oxide such as Mn-Zn ferrite, and they have opposing surfaces opposed to each other to provide the magnetic gap. The first ferromagnetic metal thin film formed of Fe-Si-Al alloy is formed at least on one of the opposing surfaces. The second ferromagnetic metal thin film formed of Fe-Si-Al alloy having different constituent ratio from the first ferromagnetic metal thin film is formed between the magnetic gap and the first ferromagnetic metal thin film. The flux density of the second ferromagnetic metal thin film induced when a magnetic field of 1.2K oersted is applied exceeds 1000 gauss. The ratio of the saturation flux density of the second ferromagnetic metal thin film to that of the first ferromagnetic metal thin film is not higher than 0.6. The self recording reproducing capability of the magnetic head is not degraded in the high frequency region, and the self recording reproducing capability in the low frequency region is increased.

摘要翻译： 磁头具有彼此相对的一对磁芯半部，其间具有非磁性材料，以形成磁隙，该磁头包括一对磁芯半部，第一铁磁金属薄膜和第二铁磁金属薄片 电影。 磁芯半部由诸如Mn-Zn铁氧体的铁磁性氧化物形成，并且它们具有彼此相对的相对表面以提供磁隙。 由Fe-Si-Al合金形成的第一铁磁金属薄膜至少在相对的表面之一上形成。 在磁隙和第一铁磁金属薄膜之间形成由与第一强磁性金属薄膜构成比不同的Fe-Si-Al合金形成的第二强磁性金属薄膜。 当施加1.2K奥斯特的磁场时引起的第二铁磁性金属薄膜的磁通密度超过1000高斯。 第二强磁性金属薄膜的饱和磁通密度与第一强磁性金属薄膜的饱和磁通密度的比率不高于0.6。 在高频区域中，磁头的自记录再现能力不会降低，并且低频区域中的自动记录再现能力增加。

公开(公告)号：US5278716A

公开(公告)日：1994-01-11

申请号：US974757

申请日：1992-11-12

申请人： Hiroyuki Okuda ,  Yoshiaki Shimizu ,  Kazuo Ino ,  Kousou Ishihara ,  Takashi Ogura

发明人： Hiroyuki Okuda ,  Yoshiaki Shimizu ,  Kazuo Ino ,  Kousou Ishihara ,  Takashi Ogura

IPC分类号： G11B5/147 ,  G11B5/235

CPC分类号： G11B5/147 ,  G11B5/235

摘要： A magnetic head comprises a pair of magnetic core halves, heat-resistant thin films and ferromagnetic thin films, the pair of magnetic core halves being opposed to each other through a non-magnetic material such as SiO.sub.2 to form a magnetic gap. The magnetic core halves are made of a ferromagnetic oxide such as ferrite and have gap forming faces to be opposed to each other to form the magnetic gap. The gap forming faces are etched by phosphoric acid solution and then purified by reverse sputtering, so that a grown crystal of the ferromagnetic oxide is exposed on the gap forming faces. A heat-resistant thin film of a heat-resistant material such as SiO.sub.2 is formed on each of the gap forming faces. A ferromagnetic thin film of a ferromagnetic metal material such as sendust is formed on each heat-resistant thin film. Preferably, the thickness of the heat-resistant thin film to be formed is 1 nm or more and one tenth or less of the width of the magnetic gap. For example, SiO.sub.2 films of 5 nm in thickness as the heat-resistant thin films are formed on the respective gap forming faces and sendust films of 3 .mu.m in thickness as the ferromagnetic metal thin films are formed on the respective SiO.sub.2 films. In this case, the gap length of the magnetic gap is set to 0.2 .mu.m.

摘要翻译： 磁头包括一对磁芯半部，耐热薄膜和铁磁性薄膜，一对磁芯半部通过非磁性材料如SiO 2彼此相对以形成磁隙。 磁芯半部由诸如铁氧体的铁磁性氧化物制成，并且具有彼此相对的间隙形成面以形成磁隙。 通过磷酸溶液蚀刻间隙形成面，然后通过反溅射进行纯化，使得在间隙形成面上暴露铁磁性氧化物的生长晶体。 在每个间隙形成面上形成耐热材料如SiO 2的耐热薄膜。 在每个耐热薄膜上形成铁硬金属材料如铁硅铝铁合金的铁磁薄膜。 优选地，要形成的耐热薄膜的厚度为磁隙宽度的1nm以上且十分之一以下。 例如，由于在各SiO 2膜上形成强磁性金属薄膜，所以在3（μm）m的间隙形成面和厚度为3μm的厚度的薄膜上，形成5nm厚的SiO 2膜。 在这种情况下，磁隙的间隙长度设定为0.2（my）m。

公开(公告)号：US5099376A

公开(公告)日：1992-03-24

申请号：US650814

申请日：1991-01-31

申请人： Kazuo Ino ,  Yoshiaki Shimizu ,  Hiroyuki Okuda ,  Kousou Ishihara ,  Takashi Ogura

发明人： Kazuo Ino ,  Yoshiaki Shimizu ,  Hiroyuki Okuda ,  Kousou Ishihara ,  Takashi Ogura

IPC分类号： G11B5/127 ,  G11B5/187

CPC分类号： G11B5/127 ,  G11B5/1871 ,  Y10T29/49046 ,  Y10T29/49057 ,  Y10T29/49067

摘要： A magnetic head comprises a pair of magnetic core halves (1a, 1b), which are abutted with each other through a nonmagnetic material to define a magnetic gap (2), and ferromagnetic thin films (3a, 3b). The magnetic core halves (1a, 1b), which are formed of ferromagnetic oxide, have gap forming surfaces to be abutted with each other. The ferromagnetic metal thin films (3a, 3b) are selectively formed on the gap forming surfaces of the pair of magnetic core halves (1a, 1b). A ferromagnetic thin film (3b) is so formed that portion (12b, 12c, 12d) to be provided with a track width regulating groove (13b), a coil groove (13c) or a joining member receiving groove (13d) is exposed within a gap forming surface of one magnetic core half member (7b). Another ferromagnetic thin film (3a) is so formed that, in a gap forming surface of another magnetic core half member (7a), a portion (12e, 12f) opposite to the coil groove (13c) or the joining member receiving groove (13d) to be provided in the gap forming surface of the magnetic core half member (7b) is exposed. These ferromagnetic thin films (3a, 3b) are selectively formed by ion beam etching. Grooves (13b, 13c, 13d) are provided in one magnetic core half (1b) by mechanical working through a dicing saw or the like.

公开(公告)号：US4953049A

公开(公告)日：1990-08-28

申请号：US218018

申请日：1988-07-12

申请人： Hiroyuki Okuda ,  Yoshiaki Shimizu ,  Kazuo Ino ,  Kousou Ishihara ,  Takashi Ogura

发明人： Hiroyuki Okuda ,  Yoshiaki Shimizu ,  Kazuo Ino ,  Kousou Ishihara ,  Takashi Ogura

IPC分类号： G11B5/127 ,  G11B5/133 ,  G11B5/187 ,  G11B5/23

CPC分类号： G11B5/1874 ,  G11B5/1878

摘要： A magnetic head comprises a pair of magnetic core halves, heat-resistant thin films and ferromagnetic thin films, the pair of magnetic core halves being opposed to each other through a non-magnetic material such as SiO.sub.2 to form a magnetic gap. The magnetic core halves are made of a ferromagnetic oxide such as ferrite and have gap forming faces to be opposed to each other to form the magnetic gap. The gap forming faces are etched by phosphoric acid solution and then purified by reverse sputtering, so that a grown crystal of the ferromagnetic oxide is exposed on the gap forming faces. A heat-resistant thin film of a heat-resistant material such as SiO.sub.2 is formed on each of the gap forming faces. A ferromagnetic thin film of a ferromagnetic metal material such as sendust is formed on each heat-resistant thin film. Preferably, the thickness of the heat-resistant thin film to be formed is 1 nm or more and one tenth or less of the width of the magnetic gap. For example, SiO.sub.2 films of 5 nm in thickness as the heat-resistant thin films are formed on the respective gap forming faces and sendust films of 3 .mu.m in thickness as the ferromagnetic metal thin films are formed on the respective SiO.sub.2 films. In this case, the gap length of the magnetic gap is set to 0.2 .mu.m.

公开(公告)号：US5195004A

公开(公告)日：1993-03-16

申请号：US826192

申请日：1992-01-21

申请人： Hiroyuki Okuda ,  Yoshiaki Shimizu ,  Kazuo Ino ,  Kousou Ishihara ,  Takashi Ogura

发明人： Hiroyuki Okuda ,  Yoshiaki Shimizu ,  Kazuo Ino ,  Kousou Ishihara ,  Takashi Ogura

IPC分类号： G11B5/187

CPC分类号： G11B5/1874 ,  G11B5/1878 ,  Y10T29/49043 ,  Y10T29/49052 ,  Y10T29/49067

摘要： A magnetic head comprises a pair of magnetic core halves, heat-resistant thin films and ferromagnetic thin films, the pair of magnetic core halves being opposed to each other through a non-magnetic material such as SiO.sub.2 to form a magnetic gap. The magnetic core halves are made of a ferromagnetic oxide such as ferrite and have gap forming faces to be opposed to each other to form the magnetic gap. The gap forming faces are etched by phosphoric acid solution and then purified by reverse sputtering, so that a grown crystal of the ferromagnetic oxide is exposed on the gap forming faces. A heat-resistant thin film of a heat-resistant material such as SiO.sub.2 is formed on each of the gap forming faces. A ferromagnetic thin film of a ferromagnetic metal material such as sendust is formed on each heat-resistant thin film. Preferably, the thickness of the heat-resistant thin film to be formed is 1 nm or more and one tenth or less of the width of the magnetic gap. For example, SiO.sub.2 films of 5 nm in thickness as the heat-resistant thin films are formed on the respective gap forming faces and sendust films of 3 .mu.m in thickness as the ferromagnetic metal thin films are formed on the respective SiO.sub.2 films. In this case, the gap length of the magnetic gap is set to 0.2 .mu.m.

摘要翻译： 磁头包括一对磁芯半部，耐热薄膜和铁磁性薄膜，一对磁芯半部通过非磁性材料如SiO 2彼此相对以形成磁隙。 磁芯半部由诸如铁氧体的铁磁性氧化物制成，并且具有彼此相对的间隙形成面以形成磁隙。 通过磷酸溶液蚀刻间隙形成面，然后通过反溅射进行纯化，使得在间隙形成面上暴露铁磁性氧化物的生长晶体。 在每个间隙形成面上形成耐热材料如SiO 2的耐热薄膜。 在每个耐热薄膜上形成铁硬金属材料如铁硅铝铁合金的铁磁薄膜。 优选地，要形成的耐热薄膜的厚度为磁隙宽度的1nm以上且十分之一以下。 例如，在相应的SiO 2膜上形成强磁性金属薄膜的情况下，在厚度为3μm的各个间隙形成面和厚度厚度的薄膜上形成5nm厚的作为耐热薄膜的SiO 2膜。 在这种情况下，磁隙的间隙长度设定为0.2μm。

公开(公告)号：US5007158A

公开(公告)日：1991-04-16

申请号：US307654

申请日：1989-02-08

申请人： Kazuo Ino ,  Yoshiaki Shimizu ,  Hiroyuki Okuda ,  Kousou Ishihara ,  Takashi Ogura

发明人： Kazuo Ino ,  Yoshiaki Shimizu ,  Hiroyuki Okuda ,  Kousou Ishihara ,  Takashi Ogura

IPC分类号： G11B5/127 ,  G11B5/187

CPC分类号： G11B5/127 ,  G11B5/1871 ,  Y10T29/49046 ,  Y10T29/49057 ,  Y10T29/49067

摘要： A magnetic head comprises a pair of magnetic core halves (1a, 1b), which are abutted with each other through a nonmagnetic material to define a magnetic gap (2), and ferromagnetic thin films (3a, 3b). The magnetic core halves (1a, 1b), which are formed of ferromagnetic oxide, have gap forming surfaces to be abutted with each other. The ferromagnetic metal thin films (3a, 3b) are selectively formed on the gap forming surfaces of the pair of magnetic core halves (1a, 1b). A ferromagnetic thin film (3b) is so formed that portion (12b, 12c, 12d) to be provided with a track width regulating groove (13b), a coil groove (13c) or a joining member receiving groove (13d) is exposed within a gap forming surface of one magnetic core half member (7b). Another ferromagnetic thin film (3a) is so formed that, in a gap forming surface of another magnetic core half member (7a), a portion (12e, 12f) opposite to the coil groove (13c) or the joining member receiving groove (13d) to be provided in the gap forming surface of the magnetic core half member (7b) is exposed. These ferromagnetic thin films (3a, 3b) are selectively formed by ion means beam etching. Grooves (13b, 13c, 13d) are provided in one magnetic core half (1b) by mechanical working through a dicing saw or the like.

公开(公告)号：US09939494B2

公开(公告)日：2018-04-10

申请号：US14400960

申请日：2012-05-15

申请人： Takashi Ogura

发明人： Takashi Ogura

IPC分类号： H02J7/00 ,  G01R31/36 ,  H01M10/48

CPC分类号： G01R31/3627 ,  G01R31/3648 ,  H01M10/48 ,  H01M2220/20

摘要： A concentration distribution in an active material of a battery unit is calculated by using a diffusion equation, and a first polarization elimination time taken for the concentration distribution in the active material to fall within an allowable range is calculated assuming that charge and discharge of the battery unit is not performed. A concentration distribution in an electrolyte of the battery unit is calculated by using a diffusion equation, and a second polarization elimination time taken for the concentration distribution in the electrolyte to fall within an allowable range is calculated assuming that the charge and the discharge of the battery unit is not performed. It is determined that polarization of the battery unit is eliminated when a time for which the charge and the discharge of the battery unit is not performed is longer than the longer one of the first polarization elimination time and the second polarization elimination time.

公开(公告)号：US09131292B2

公开(公告)日：2015-09-08

申请号：US13992653

申请日：2011-12-09

申请人： Ken'ichi Ejima ,  Takashi Ogura ,  Koji Moriguchi

发明人： Ken'ichi Ejima ,  Takashi Ogura ,  Koji Moriguchi

IPC分类号： H04R3/00 ,  H04L9/00 ,  H04R1/08

CPC分类号： H04R3/00 ,  H04L9/00 ,  H04L63/0428 ,  H04R1/08 ,  H04R2420/07 ,  H04W12/02

摘要： Provided is a wireless microphone system comprising a microphone and a wireless receiver, wherein the wireless microphone system is provided with: a normal communication mode in which communication is performed by using a normal unique word (UWN) preset in both the microphone and the wireless receiver devices; a confidential setting mode in which a confidential unique word (UWX) is transmitted without being set in either of said devices; and a confidential communication mode in which communication is performed by both said devices by using the confidential unique word (UWX) set by the confidential setting mode.

摘要翻译： 提供了一种包括麦克风和无线接收器的无线麦克风系统，其中无线麦克风系统被提供有：正常通信模式，其中通过使用在麦克风和无线接收机中预设的普通唯一字（UWN）来执行通信 设备; 保密设置模式，其中在不在所述设备中的任一个中发送机密唯一字（UWX）; 以及通过使用通过机密设置模式设置的机密唯一字（UWX）由两个所述设备进行通信的机密通信模式。