公开(公告)号：JP2004234851A

公开(公告)日：2004-08-19

申请号：JP2004088601

申请日：2004-03-25

Applicant: Sony Corp ,  ソニー株式会社

Inventor： SUGAWARA AKIRA ,  KANAYAMA NAOYUKI ,  KONNO MASAHIRO

IPC: G11B5/127 ,  G11B5/187

Abstract: PROBLEM TO BE SOLVED: To realize good head characteristics by reducing the volume of a magnetic body while solving the problems of the mechanical strength of the magnetic head, compatibility with conventional products and the like, and to prevent reduction or the like in production efficiency therefor.
SOLUTION: In the magnetic head formed by fitting a pair of magnetic core halves 1 to each other through a nonmagnetic gap 2, and provided with a sliding surface 5 with a magnetic recording medium in which the nonmagnetic gap 2 and one end surface of the magnetic core half 1 are exposed, a nonmagnetic part 8 formed by pouring a molten low-melting point glass material thereinto is disposed not on one end surface of the magnetic core half 1 on the sliding surface 5 but on the end side of the sliding surface 5.
COPYRIGHT: (C)2004,JPO&NCIPI

Abstract translation: 要解决的问题：为了通过减小​​磁体的体积来解决磁头的机械强度，与常规产品的兼容性等的问题，并且防止还原等，来实现良好的头部特性 生产效率。 解决方案：在通过非磁性间隙2将一对磁芯半体1彼此配合而形成的磁头中，并且具有带有磁记录介质的滑动表面5，其中非磁性间隙2和一个端面 磁芯半体1露出，通过将熔融的低熔点玻璃材料注入其中而形成的非磁性部分8不设置在滑动表面5上的磁芯半体1的一个端面上，而是在 滑动面5.版权所有（C）2004，JPO＆NCIPI

公开(公告)号：JP2001155306A

公开(公告)日：2001-06-08

申请号：JP33496999

申请日：1999-11-25

Applicant: SONY CORP

Inventor： FUJISAWA NORIKATSU ,  HONDA JUNICHI ,  SASAKI MASAYUKI ,  KONNO MASAHIRO

IPC: B24B57/04 ,  B24B19/26 ,  G11B5/127 ,  G11B5/187

Abstract: PROBLEM TO BE SOLVED: To manufacture a magnetic head in which a high precision track width regulating groove is efficiently cut and in which high reliability and improved input/output characteristics are realized. SOLUTION: This method is applied to a magnetic head 1 where metallic magnetic films 5, 6 are formed on the gap-constituting faces of core halves 2, 3 and track width regulating grooves 9, 10 constituting, a projected magnetic tape working face 11 corresponding to a recording track width are prepared by cutting/machining on a magnetic tape sliding face 8 by means of a grinding stone 50. In the cutting/machining of the track width regulating grooves 9, 10, the grinding stone 50 is used for which a shaping process is performed on the side face 52 after another shaping process is performed on the outer circumferential face by supplying an abrasive grain liquid 55 in which powder abrasive grain is dissolved.

公开(公告)号：JP2002319105A

公开(公告)日：2002-10-31

申请号：JP2001120530

申请日：2001-04-19

Applicant: SONY CORP

Inventor： SUGAWARA AKIRA ,  KANAYAMA NAOYUKI ,  KONNO MASAHIRO ,  SATO KAZUMASA ,  CHIBA JUNJI

IPC: G11B5/127

Abstract: PROBLEM TO BE SOLVED: To clear up the optimum thermal treatment condition for a magnetic core formed by using a joined ferrite which is formed by integrally joining single crystalline ferrite and polycrystalline ferrite to each other. SOLUTION: In the manufacturing method for a magnetic head wherein the magnetic core is constituted by using the joined ferrite which is formed by integrally joining the single crystalline ferrite and the polycrystalline ferrite to each other, after the joined ferrite is formed in the shape fitted to the magnetic core, the joined ferrite single body is subjected to the thermal treatment of 850-950 deg.C maximum temperature zone.

公开(公告)号：JP2002312906A

公开(公告)日：2002-10-25

申请号：JP2001114970

申请日：2001-04-13

Applicant: SONY CORP

Inventor： SUGAWARA AKIRA ,  KANAYAMA NAOYUKI ,  KONNO MASAHIRO

IPC: G11B5/127

Abstract: PROBLEM TO BE SOLVED: To enhance the recording and reproducing performance of a magnetic head more by carrying out a heat treatment (annealing) which greatly improves the head characteristics. SOLUTION: When a heat treatment, in which the peak temperature is equal to or lower than the glass transition point, carried out for a magnetic head chip to eliminate internal distortion during the formation of the magnetic head chip, the heat treatment is carried out by a temperature pattern having peaks twice or more (S103, S109).

公开(公告)号：JP2004152407A

公开(公告)日：2004-05-27

申请号：JP2002316467

申请日：2002-10-30

Applicant: Sony Corp ,  ソニー株式会社

Inventor： SUGAWARA AKIRA ,  KANAYAMA NAOYUKI ,  KONNO MASAHIRO

IPC: G11B5/127

Abstract: PROBLEM TO BE SOLVED: To provide a magnetic head with improved head characteristics and improved productivity and its manufacturing method.
SOLUTION: This magnetic head is provided with a front core part 2 made of single crystal ferrite, a back core part 3 made of polycrystalline ferrite, and a winding wire window part 10 formed over the front core part 2 and the back core part 3. The back core part 3 is made of the polycrystalline ferrite being a single member.
COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2002312907A

公开(公告)日：2002-10-25

申请号：JP2001114969

申请日：2001-04-13

Applicant: SONY CORP

Inventor： SUGAWARA AKIRA ,  KANAYAMA NAOYUKI ,  KONNO MASAHIRO

IPC: G11B5/10 ,  G11B5/127 ,  G11B5/187 ,  G11B5/255

Abstract: PROBLEM TO BE SOLVED: To realize excellent head characteristics, and to prevent reduction in production efficiency or the like thereby by reducing the volume of a mag netic body while solving the problems of the mechanical strength of a magnetic head and compatibility with conventional product or the like. SOLUTION: The magnetic head is formed by butting a pair of magnetic core halves 1 against each other interposing a nonmagnetic gap 2 between them, and provided with a sliding surface 5 with a magnetic recording medium, in which the nonmagnetic gap 2 and one end surface of the magnetic core halve 1 are exposed. Not on one end surface of the magnetic core half 1 on the sliding surface 5, but on the end side of the sliding surface 5, a nonmagnetic part 8 filled with a glass material is disposed.