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1. 发明专利

JP2008050236A Lead-free glass composition and magnetic head 审中-公开
标题翻译：无铅玻璃组合物和磁头
公开(公告)号：JP2008050236A
公开(公告)日：2008-03-06
申请号：JP2006230798
申请日：2006-08-28
申请人： Sony Corp , ソニー株式会社
发明人： KOBAYASHI IZUMI , SHIMADA TETSUO , SATO HEIKICHI , WAKAMATSU HIRONOBU
IPC分类号： C03C8/04 , G11B5/127
摘要： PROBLEM TO BE SOLVED: To provide a highly reliable low melting point lead-free glass composition, and a magnetic head using this lead-free glass composition.
SOLUTION: The lead-free glass composition comprises, in mass% based on oxide, 56-68 Bi
2 O
3 , 4-9 B
2 O
3 , 4-6 ZnO, >13 to ≤21 SiO
2 , 1-7 Na
2 O, 0-2 Sb
2 O
3 , 2-7 Fe
2 O
3 and 0-1 ZrO
2 . The lead-free glass composition preferably comprises, in mass% based on oxide, 60-68 Bi
2 O
3 , 4-8 B
2 O
3 , 5-6 ZnO, >13 to ≤17 SiO
2 , 1-5 Na
2 O, 1-2 Sb
2 O
3 , 2-7 Fe
2 O
3 and 0-1 ZrO
2 . The magnetic head is constituted by using these lead-free glass compositions.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供高可靠性的低熔点无铅玻璃组合物和使用该无铅玻璃组合物的磁头。解决方案：无铅玻璃组合物以质量％为基准，以氧化物计含有56-68 Bi 2 SB 3 O 3，SBB 2， 4-6 ZnO，> 13至≤21SiO 2 ，1-7 Na 2 SBO，0- 2 Sb 2 3 ，2-7 Fe 2 3 和0-1 ZrO 2 。无铅玻璃组合物优选以质量％为基准，以氧化物计，60-68 Bi 2 SB 3 O 3，SBB 4， O 3 SB 3，5〜6 ZnO，13〜≤17SiO 2 SB 1，Sb 2 O 2，Sb 2 Sb 2 O 3 ，2-7 Fe 2 3 和0-1 ZrO 2 SB / 。使用这些无铅玻璃组合物构成磁头。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JP2002245604A MAGNETIC HEAD AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2002245604A
公开(公告)日：2002-08-30
申请号：JP2001037424
申请日：2001-02-14
申请人： SONY CORP
发明人： SATO HEIKICHI , SAKATA KATSUMI , CHIBA SHIGEMI , KOBAYASHI TAKAYUKI
IPC分类号： G11B5/187
摘要： PROBLEM TO BE SOLVED: To improve quality by preventing the generation of a glass bubble in an MIG(metal in gap) magnetic head. SOLUTION: The magnetic head is constructed in such a manner that on a sliding surface 9 for sliding of a magnetic recording medium, a groove 6 is provided along a sliding direction relative to the magnetic recording medium in contact with one or both ends of a magnetic gap (g), a nonmagnetic protective film 7 is formed on the inner surface of the groove 6, and a part of a glass surface 5B1 facing the inner surface of the groove 6 and in contact with the nonmagnetic protective film 7 is subjected to ion etching.

3. 发明专利

JP2001028105A MAGNETIC HEAD 失效
公开(公告)号：JP2001028105A
公开(公告)日：2001-01-30
申请号：JP2000196294
申请日：2000-06-26
申请人： SONY CORP
发明人： SATO HEIKICHI , URAI AKIRA , AOKI KAORU , INMAKI YOICHI
IPC分类号： G11B5/127 , G11B5/187
摘要： PROBLEM TO BE SOLVED: To increase recording efficiency by providing a groove on a sliding face of a magnetic head, in a manner that the grooves is parallel in a sliding direction of a magnetic recording medium and that the groove is in contact with one end of a magnetic gap, and thereby fully preventing side erasing. SOLUTION: On the sliding face 10A, a linear groove 16 is provided which is parallel in the sliding direction of a magnetic recording medium with a high coercive force and which is in contact with one end of a magnetic gap(g). By this groove 16, each magnetic core half bodies 11a, 11b near the magnetic gap(g) is regulated nearly parallelly in the sliding direction of the magnetic recording medium with a high coercive force. Incidentally, the groove 16 is arranged on an overwriting side if a recording system of information signals is an overwriting type. Also, the structure is such that an azimuth angle of an azimuth recording system is 15 deg. or more and that difference between an angle against the sliding direction of the face constituting one track width regulating groove and of the face constituting the other is 20 deg. or under in the magnetic gap.

4. 发明专利

JPH06111227A MANUFACTURE FOR MAGNETIC HEAD, AND WHETSTONE USED IN EXECUTION OF THE MANUFACTURE 失效
公开(公告)号：JPH06111227A
公开(公告)日：1994-04-22
申请号：JP28078892
申请日：1992-09-25
申请人： SONY CORP
发明人： SATO HEIKICHI , KIMURA HITOSHI , ONODERA OSAMU , SATO TERUMI
IPC分类号： B24D3/00 , G11B5/127 , G11B5/187
摘要： PURPOSE:To process a magnetic head with high yield in the stable manner by using a whetsone including abrasive grains of cubic baron nitride when a plurality of different kinds of material constituting the magnetic head are processed together. CONSTITUTION:When a plurality of different kinds of material constituting a magnetic head are to be processed, a whetstone 21 including abrasive grains 20 of cubic boron nitride is used. The abrasive grains of the whetstone 21 are hardened by a copper-tin series, an iron series, a nickel series or a phenol series bonding material. For fragility processing and ductility processing, abrasive grains 20 of cubic boron nitride of 60-8mum average particle size and of 15-1mum average particle size are respectively used. Since the abrasive grains 20 of the whetstone 21 have sufficient hardness and heat-proofness and shows no abrasion at the processing time, a highly-efficient head can be manufactured stably with high yield.

5. 发明专利

JPH0552563B2 失效
公开(公告)号：JPH0552563B2
公开(公告)日：1993-08-05
申请号：JP9535783
申请日：1983-05-30
申请人： SONY CORP
发明人： KOBAYASHI TOMIO , SATO HEIKICHI , KANO SHOICHI , KUBOTA MAKOTO , TAKAHASHI YOSHIMI , HISAMURA TATSUO
IPC分类号： G11B5/127 , G11B5/147 , G11B5/187 , G11B5/23

6. 发明专利

JPH05135321A PRODUCTION OF MAGNETIC HEAD 失效
公开(公告)号：JPH05135321A
公开(公告)日：1993-06-01
申请号：JP32230491
申请日：1991-11-12
申请人： SONY CORP
发明人： OGATA SEIICHI , SATO HEIKICHI
IPC分类号： G11B5/23
摘要： PURPOSE:To enable control of a track width with high accuracy and to greatly improve a yield and productivity. CONSTITUTION:A 1st groove 57 having a pair of slopes 57a, 57b inclined in the directions varying from each other with a magnetic gap forming surface is formed on a substrate 56 and thereafter magnetic metallic thin films 58a, 58b, 58c, 58d are formed on these slopes 57a, 57b. A 2nd groove 59 regulating the track width is formed in proximity to at least one slope 57a to produce a head core block. This head core block is cut and bisected in the direction approximately orthogonal to the 1st groove 57. A pair of the bisected head core blocks 61, 62 are joined by butting the magnetic metallic thin films 58a, 58b and 58c, 58d formed in the same 1st groove 57 to each other.

7. 发明专利

JPH05128431A MAGNETIC HEAD 失效
公开(公告)号：JPH05128431A
公开(公告)日：1993-05-25
申请号：JP28639591
申请日：1991-10-31
申请人： SONY CORP
发明人： URAI AKIRA , SATO HEIKICHI , MURAKAMI AKIRA
IPC分类号： G11B5/23
摘要： PURPOSE:To improve the productivity and yield of the magnetic head constituted of a metal-in-gap type by decreasing the distortions and peeling of the magnetic metallic thin films thereof. CONSTITUTION:A least one of magnetic core half bodies 11 and 12 are constituted of oxide magnetic material parts 1 and 2 and the magnetic metallic thin film part 3. A pair of such magnetic core half bodies 11 and 12 are butted against each other and a magnetic gap g is formed on the butt surface of the magnetic metallic thin film 3 part, by which the magnetic head 20 is constituted. The magnetic metallic thin film part 3 is constituted by laminating a magnetic metallic thin films and an insulating layer. This insulating layer is constituted of at least one kind of Fe and element M and the oxide thereof. The element M is selected from Al, Ga, Zr, Nb, Ru, and Ta.

8. 发明专利

JPH0581610A PRODUCTION OF CORE MATERIAL FOR MAGNETIC HEAD 失效
公开(公告)号：JPH0581610A
公开(公告)日：1993-04-02
申请号：JP27048191
申请日：1991-09-24
申请人： SONY CORP
发明人： SATO HEIKICHI , MURAKAMI AKIRA
IPC分类号： G11B5/23
摘要： PURPOSE:To produce a core material for a magnetic head with a magnetic metal film with high dimensional accuracy at a low cost. CONSTITUTION:Plural projections 2 are formed on one principal face of a first substrate 1 at prescribed pitches and grooves 4 for fixing the projections 2 are formed in a second substrate 3. The projections 2 are fixed in the grooves 4 and a magnetic metal film 5 is formed between the grooves 4 and the projections 2. The substrates 1, 3 are then integrated by joining and the first substrate 1 is polished until one principal face 3a of the second substrate 3 is exposed.

9. 发明专利

JPH0540910A MANUFACTURE OF NARROW TRACK MAGNETIC HEAD 失效
公开(公告)号：JPH0540910A
公开(公告)日：1993-02-19
申请号：JP19440591
申请日：1991-08-02
申请人： SONY CORP
发明人： SATO HEIKICHI , OGATA SEIICHI
IPC分类号： G11B5/23
摘要： PURPOSE:To improve the increase of magnetic reluctance attendant on making narrow track without increasing the number of the working process. CONSTITUTION:In a core block constituting a magnetic core half body of a metal in gap type magnetic head, track width control grooves 2, 7 are linearly ground by a grinding wheel to a depth deep in the core front side and shallow in the back side so that the depth and width of the grooves are formed large in the front side and small in the back side.

10. 发明专利

JPH0528422A MAGNETIC HEAD 失效
公开(公告)号：JPH0528422A
公开(公告)日：1993-02-05
申请号：JP18117291
申请日：1991-07-22
申请人： SONY CORP
发明人： KIMURA HITOSHI , KOJIMA HIDEAKI , SATO HEIKICHI
IPC分类号： G11B5/127 , G11B5/23
摘要： PURPOSE:To improve reproductive output characteristics in a magnetic head by inhibiting a waviness of reproductive output by avoiding false gap effect. CONSTITUTION:A couple of oxide magnetic core half bodies 11 and 12 in which at least one of oxide magnetic core half bodies 11 and 12 constitutes oxide magnetic material parts 1 and 2 and metallic magnetic thin film 3 and 4 are butted each other, a magnetic gap (g) is formed at the butting faces of metallic magnetic thin film 3 and 4. In this magnetic head 40, interfaces 1S and 2S in a vicinity of opposing metallic thin films 3 and 4 of oxide magnetic material parts 1 and 2 shows (110) crystal face, and has a favorable crystallization ability in a vicinity of interfaces 1S and 2S.

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