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公开(公告)号：JPH08153308A
公开(公告)日：1996-06-11
申请号：JP29347094
申请日：1994-11-28
Applicant: SONY CORP
Inventor： OGATA SEIICHI , SAITO TADASHI , URAI AKIRA , KOSAKA MASAYA
Abstract: PURPOSE: To suppress the generation of bubbles in glass at the time of fusion bonding and to diminish defects due to bubbles by forming a gap film in a process for producing a magnetic head and carrying out baking before the top layer of the gap film is formed. CONSTITUTION: When a gap film 8 is formed in a process for producing a magnetic head, baking is carried out before the top layer 8b of the gap film 8 is formed and the generation of bubbles in fusion bonding glass is suppressed. The gap film 8 may be any multilayered film consisting of two or more layers and it is, e.g. a two-layered film obtd. by successively forming an SiO2 film and a reaction preventing film on a metallic magnetic film. A film of an oxide such as Cr O Ta2 O5 or ZrO2 , a nitride such as Si3 N4 , a metal such as Al, Si or Pt or an alloy of such metals is used as the reaction preventing film.
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公开(公告)号：JPH08185607A
公开(公告)日：1996-07-16
申请号：JP32915894
申请日：1994-12-28
Applicant: SONY CORP
Inventor： KOSAKA MASAYA , URAI AKIRA
Abstract: PURPOSE: To provide a magnetic head which completely prevents the reaction of fusing glass and magnetic metallic thin films and has excellent reliability. CONSTITUTION: The protective films 7, 8 for preventing the reaction of the magnetic metallic thin films 5, 6 and the fusing glass 9 at the time of fusing with glass are formed by a CVD method at the time of forming these protective films 7, 8 on the butt surfaces of a pair of magnetic cores 1, 2 formed with the magnetic metallic thin films 5, 6 on at least one surfaces. The protective films 7, 8 include, for example, SiO2 films, Ta2 O5 films, carbon films, etc.
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公开(公告)号：JPH076320A
公开(公告)日：1995-01-10
申请号：JP14764393
申请日：1993-06-18
Applicant: SONY CORP
Inventor： KOSAKA MASAYA , KOJIMA HIDEAKI , URAI AKIRA
Abstract: PURPOSE:To ensure adhesive strength of a metallic magnetic film to a reaction preventing film and to obtain a magnetic head having high recording and reproducing characteristics and fit for high density magnetic recording. CONSTITUTION:Metallic magnetic films 3, 4 are formed on the opposite faces of magnetic core substrates 1, 2 made of a magnetic oxide material while interposing reaction preventing films 15, 16 to obtain a pair of magnetic core halves 5, 6. The metallic magnetic films 3, 4 of the core halves 5, 6 are then butted and a magnetic gap is formed between the butted faces. The parts 3a, 4a of the metallic magnetic films 3, 4 close to the magnetic gap are made of a soft magnetic alloy contg. oxygen and the parts 3b, 4b close to the reaction preventing films are made of the same material as the soft magnetic alloy but do not contain oxygen.
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公开(公告)号：JP2002334404A
公开(公告)日：2002-11-22
申请号：JP2001139073
申请日：2001-05-09
Applicant: SONY CORP
Inventor： KOSAKA MASAYA
Abstract: PROBLEM TO BE SOLVED: To achieve high quality and high yield of a magnetic head. SOLUTION: Heat treatment is executed, in a rotational magnetic field, for a magnetic core material having a metal magnetic thin film 4 made of an amorphous material formed on one main surface of a substrate 3. The magnetic permeability of the metal magnetic thin film 4 of the heat-treated magnetic core material is measured, a magnetic core material having a magnetic permeability set equal to/higher than a predetermined value is selected, and a magnetic head 1 is manufactured by using this magnetic core material.
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公开(公告)号：JP2001143217A
公开(公告)日：2001-05-25
申请号：JP32343599
申请日：1999-11-12
Applicant: SONY CORP
Inventor： KOSAKA MASAYA , AOKI KAORU
Abstract: PROBLEM TO BE SOLVED: To reduce eddy current loss. SOLUTION: A metal magnetic film 5 constituting a magnetic core has a laminated structure including a metal magnetic layer 10 and an insulating layer 11. A nonmagnetic film 6 as a magnetic gap is formed in a laminated structure including, from a side in contact with the metal magnetic film 5, a first film 20 made of an insulating material, a second film 21 made of Cr, and a third film 22 made of Au.
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Patent Agency Ranking
公开(公告)号：JPH05242419A
公开(公告)日：1993-09-21
申请号：JP27616191
申请日：1991-09-30
Applicant: SONY CORP
Inventor： SATO HEIKICHI , URAI AKIRA , KIMURA HITOSHI , MURAKAMI AKIRA , KOSAKA MASAYA , ONODERA OSAMU
IPC: G11B5/23
Abstract: PURPOSE:To prevent the peeling of a metallic magnetic thin film and also to prevent the crack of a magnetic core material. CONSTITUTION:After a first groove 2 having a slope 2a inclinded against a face 1a to be a magnetic gap forming surface is formed a base plate 1, an oxidized reactive base film 3 is formed at the slope 2a of the first groove 2, and the metallic magnetic thin film 4 is formed on the oxidized reactive base film 3. Then a second groove for controlling a track width is formed adjacent to the slope 2a and a head core block is formed and the head core blocks are connected with each other and then cut to a head chip.
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公开(公告)号：JP2002074610A
公开(公告)日：2002-03-15
申请号：JP2000263264
申请日：2000-08-28
Applicant: SONY CORP
Inventor： SATO HEIKICHI , KOSAKA MASAYA
IPC: G11B5/187
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic head having satisfactory efficiency, wherein the break (leakage) of a magnetic gap and the deterioration of the characteristics of a magnetic film are not generated. SOLUTION: In the magnetic head 100 having a sliding surface 120 which is formed at a magnetic core and a magnetic recording medium slides on, a magnetic gap g formed by disposing at least the magnetic film 130 and gap materials 130a and 130b on the sliding surface, a groove part 170 disposed to the one end part or both end parts of the magnetic gap and a non-magnetic material 161 disposed in the groove part, the aspect ratio (the depth of the groove/the width of the groove) of the groove part is more than 1 and a non- magnetic oxidized film 170a is formed at the groove part by a CVD(Chemical Vapor Deposition) method.
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公开(公告)号：JP2000011314A
公开(公告)日：2000-01-14
申请号：JP16875798
申请日：1998-06-16
Applicant: SONY CORP
Inventor： EGUCHI HIRONARI , SAKATA KATSUMI , KOSAKA MASAYA
IPC: G11B5/127
Abstract: PROBLEM TO BE SOLVED: To suppress the deterioration in the magnetic permeability of magnetic films at a high frequency and to improve the output characteristics of a magnetic head at the high frequency by specifying the film thickness of films for joining the magnetic head constituted by joining a pair of nonmagnetic substrates via magnetic films and the films for joining. SOLUTION: The magnetic permeability of the magnetic metallic films 13 exist as the major factor for governing the output characteristics of the magnetic head 10 at the high frequency. This magnetic permeability is deteriorated by the eddy current loss flowing to the magnetic metallic films 13 and the metallic films 14 for joining. The eddy current loss is larger as the film thickness of the magnetic metallic films 13 and the metallic films 14 for joining is larger and, therefore, the film thickness of the metallic films 14 for joining is regulated in order to suppress the deterioration in the magnetic permeability of the magnetic metallic films 13 by lessening the eddy current. If the film thickness of the metallic films 14 for joining is
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公开(公告)号：JP2005346764A
公开(公告)日：2005-12-15
申请号：JP2004162033
申请日：2004-05-31
Inventor： KOSAKA MASAYA , TANNO MOTOHARU
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic head and a method for manufacturing the same, in which the high-frequency characteristic is improved by preventing the deterioration in the high-frequency characteristic due to eddy current loss, by making the shape of a core of the magnetic head small.
SOLUTION: In the magnetic head 1, the pair of magnetic cores 11 are joined via a gap material; the magnetic core 11 consists of a stacked film 2 of a nonmagnetic film 17 and a metal magnetic film 16; nonmagnetic members 12 brought into contact with the magnetic core 11 and having faces facing a recording medium sliding surface 5 are disposed by sandwiching the magnetic core 11; and the magnetic path is formed of only the metal magnetic film. The part of the magnetic core at the side opposite to the sliding surface with respect to the magnetic recording medium is formed of a nonmagnetic material 14.
COPYRIGHT: (C)2006,JPO&NCIPIAbstract translation: 要解决的问题：为了提供一种磁头及其制造方法，其中通过防止由于涡流损耗引起的高频特性的劣化来提高高频特性，通过使形状 的一个核心的磁头小。 解决方案：在磁头1中，一对磁芯11通过间隙材料接合; 磁芯11由非磁性膜17的叠层膜2和金属磁性膜16组成， 通过夹着磁芯11来设置与磁芯11接触并具有面向记录介质滑动面5的面的非磁性部件12; 并且磁路仅由金属磁性膜形成。 磁芯在滑动面相对于磁记录介质的一侧的一部分由非磁性材料14形成。（C）2006，JPO＆NCIPI
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公开(公告)号：JP2000182208A
公开(公告)日：2000-06-30
申请号：JP35507598
申请日：1998-12-14
Applicant: SONY CORP
Inventor： EGUCHI HIRONARI , KOSAKA MASAYA , AOKI KAORU
IPC: G11B5/23
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic head which has large head output at high frequency and can be increased in chip strength. SOLUTION: The magnetic head 10 is formed by joining magnetic core half bodies 11 and 12 where a metal magnetic film 13 is sandwiched and formed between a couple of nonmagnetic substrates 15 and 15 and has a metal film for joining the magnetic core half bodies 11 and 12 on the join surface between the magnetic core half bodies 11 and 12 and an electric insulating film which is formed between the magnetic core half bodies 11 and 12 and the metal film and insulating the metal film and metal magnetic film electrically; and a primary film for reinforcing the connection between the magnetic core half bodies 11 and 12 and electric insulating film is formed between the magnetic core half bodies 11 and 12 and the electric insulating film.
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