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1. 发明专利

JPH0461607A MAGNETIC HEAD 失效
公开(公告)号：JPH0461607A
公开(公告)日：1992-02-27
申请号：JP17079290
申请日：1990-06-27
申请人： VICTOR COMPANY OF JAPAN
发明人： MINAMI HIROSHI , HAYASHI HIROYUKI , SAKAI KUNIHIDE
IPC分类号： G11B5/133
摘要： PURPOSE:To realize the excellent recording characteristic and reproducing characteristic by varying gradually an angle to a magnetic gap with respect to an axis of easy magnetization existing in the surface of each core of a pair of core half bodies, bending gradually the direction of the axis of each magnetization of a magnetic core and forming a closed line. CONSTITUTION:The magnetic path forming surface of a magnetic core main body is set to {110} surface, and a pair of core half bodies 12, 13 are constituted of single crystal ferrite of three layers or more extending from the front core gap 15A side to the back core gap 15B side. Subsequently, the magnetic head is constituted by making the [110] axis of easy magnetization existing in the {110} surface of each core of a pair of core half bodies 12, 13 symmetrical against the butting surface, varying gradually an angle to a magnetic gap with respect to the [110] axis of the axis of easy magnetization existing in the {110} surface of each core of a pair of core half bodies 12, 13, bending gradually the direction of the axis of easy magnetization of a magnetic core and forming a closed line. In such a way, the electromagnetic conversion efficiency of the magnetic head is improved, and the excellent recording characteristic and reproducing characteristic are realized.

2. 发明专利

JPH11213326A THIN FILM MAGNETIC HEAD CHIP AND ASSEMBLY 失效
公开(公告)号：JPH11213326A
公开(公告)日：1999-08-06
申请号：JP1438198
申请日：1998-01-27
申请人： VICTOR COMPANY OF JAPAN
发明人： MINAMI HIROSHI
IPC分类号： G11B5/31 , G11B5/29 , G11B5/33
摘要： PROBLEM TO BE SOLVED: To provide a double azimuth thin film magnetic head assembly which has a high assembling work efficiency and can prevent damage of magnetic head elements. SOLUTION: This head chip consists of a first chip substrate 1, a first element layer 2 adjacent to the first chip substrate 1, a first protective substrate 3 adjacent to the second element layer 2, a second protective substrate 4 adjacent to the first protective substrate 3, a second element layer 5 adjacent to the second protective substrate 4, and a second chip substrate 6 adjacent to the second element layer 5. This head chip is stuck to a support base 42 provided with prescribed support leads 71, 72, 73, and 74 and pad patterns 81, 82, 83, and 84.

3. 发明专利

JPH10162313A MAGNETIC HEAD 失效
公开(公告)号：JPH10162313A
公开(公告)日：1998-06-19
申请号：JP33514396
申请日：1996-11-29
申请人： VICTOR COMPANY OF JAPAN
发明人： MINAMI HIROSHI
IPC分类号： G11B5/265 , G11B5/127 , G11B5/29
摘要： PROBLEM TO BE SOLVED: To reduce crosstalk between closely arranged heads. SOLUTION: The magnetic head 10 is such that C-shaped core halves 3a, 3b and I-shaped core halves 4a, 4b are combined as a set to form magnetic head parts 10a, 10b, that these head parts are closely arranged on a head support 20 with a prescribed space d2 provided in between, and that particularly one side of the winding 7a, 7b wound on the I-shaped core halves is wound on their rear face side, so that the distance is kept away mutually between the windings; thus, crosstalk is reduced.

4. 发明专利

JPH0271408A MANUFACTURE OF MAGNETIC HEAD 失效
公开(公告)号：JPH0271408A
公开(公告)日：1990-03-12
申请号：JP22316488
申请日：1988-09-06
申请人： VICTOR COMPANY OF JAPAN
发明人： MINAMI HIROSHI
IPC分类号： G11B5/127
摘要： PURPOSE:To obtain a high reproducing characteristic in a high frequency area by griding a gap abutting surface so that its surface roughness may obtain a specific value or below, and next, ion-beam-processing or reverse-spatter- processing this ground surface. CONSTITUTION:Prescribed grinding liquid is applied to the surface of a rotating tin plate in a grinding process, the gap abutting surface of a core half-body block is pressed on the surface to which the grinding liquid is applied and it is ground so that its surface roughness may go to

5. 发明专利

JPH01178110A MAGNETIC HEAD 失效
公开(公告)号：JPH01178110A
公开(公告)日：1989-07-14
申请号：JP203088
申请日：1988-01-08
申请人： VICTOR COMPANY OF JAPAN
发明人： SAKAI KUNIHIDE , MINAMI HIROSHI , HAYASHI HIROYUKI
IPC分类号： G11B5/133
摘要： PURPOSE:To improve the reproduction output at a high frequency region and the S/N by constituting a main magnetic path of a magnetic core half by an MnZn single crystal ferrite made of a specific composition and melting and bonding glass having specific thermal expansion coefficient to the winding groove near the magnetic gap. CONSTITUTION:The main magnetic path of a magnetic core half is made of an MnZn single crystal ferrite having the composition of 51-55mol.% of Fe2O3, 21-26mol.% of MnO and 21-25mol.% of ZnO. Furthermore, glass having a thermal expansion coefficient being 75-85% of that of the MnZn single crystal ferrite is molten and bonded to the winding groove near the magnetic gap. Thus, the self recording and reproducing sensitivity at a high frequency is improved and the S/N of the reproduced picture quality is improved.

6. 发明专利

JPS6350906A MAGNETIC HEAD 失效
公开(公告)号：JPS6350906A
公开(公告)日：1988-03-03
申请号：JP19319386
申请日：1986-08-19
申请人： VICTOR COMPANY OF JAPAN
发明人： SAKAI KUNIHIDE , MINAMI HIROSHI , TAGAMI KATSUSHI
IPC分类号： G11B5/127 , G11B5/133 , G11B5/23
摘要： PURPOSE:To maximize reproduction output at 5MHz by melting and packing glass materials having the coefft. of thermal expansion lower by about 20-25% than the coefft. of thermal expansion of ferrite materials used for magnetic cores into track width control grooves. CONSTITUTION:A winding window 13 is formed on one face 12a of butt faces 11a, 12a of magnetic core hemispheres 11, 12 consisting of a soft magnetic ferrite material and the butt faces 11a, 12 are integrally joined via a gap material which consists of a nonmagnetic material and is interposed between said faces to form a magnetic gap 15 on a tape sliding surface 14. The track control grooves 16, 17 which control the width W of the gap 15 to a prescribed track width are formed on the sliding surface 14 and the glasses 18, 19 are melted and packed into the grooves 16, 17. The soft magnetic ferrite material is made of the compsn. consisting of Fe2O3: MnO: ZnO=(53-61)mol%: (32-37)mol%: (9.5-16)mol% and has >=120X10 / deg.C coefft. of thermal expansion at 0-400 deg.C. The glasses 18, 19 are so constituted as to have the coefft. of thermal expansion smaller by about 20-25% than the coefft. of thermal expansion of the ferrite material. The reproduction output at 5MHz is thereby maximized.

7. 发明专利

JPS6329308A MAGNETIC HEAD 失效
公开(公告)号：JPS6329308A
公开(公告)日：1988-02-08
申请号：JP17139486
申请日：1986-07-21
申请人： VICTOR COMPANY OF JAPAN
发明人： SAKAI KUNIHIDE , HAYASHI HIROYUKI , MINAMI HIROSHI , TAGAMI KATSUSHI
IPC分类号： G11B5/127 , G11B5/027 , H04N5/78
摘要： PURPOSE:To improve S/N and the color picture quality of a reproduced picture by selecting the gap width of a magnetic head so as to satisfy specified relations relative to the recording wavelength of a low frequency conversion carrier chrominance signals and the recording wavelength of a luminance signal to be frequency-modulated. CONSTITUTION:A magnetic head selects a gap width (g) to the value to satisfy both inequalitis lambdac/g =2 to a recording wavelength lambdac of low frequency conversion carrier chrominance signals and the recording wavelength lambdaw of a luminance signal to be frequency-modulated in a white peak clip level. Both inequalities are obtained by an experiment, etc., the gap width of a magnetic head is selected to the value to satisfy both inequalities and in both bands of the low frequency conversion carrier chrominance signals and an FM luminance signal, a recording loss, a magnetic flux reduction at the time of reproduction and a gap loss are respectively decreased. Thus, a common magnetic head is used and a satisfactory S/N video signal can be obtained.

8. 发明专利

JPH08273114A MAGNETIC HEAD 失效
公开(公告)号：JPH08273114A
公开(公告)日：1996-10-18
申请号：JP10054295
申请日：1995-03-30
申请人： VICTOR COMPANY OF JAPAN
发明人： MINAMI HIROSHI
IPC分类号： G11B5/133 , G11B5/23
摘要： PURPOSE: To obtain the magnetic head having good reproducing efficiency, etc. CONSTITUTION: This is a composite magnetic head constituted in such a way that core halves 20A and 20B are formed respectively of forward core parts 21A and 21B consisting of monocrystal ferrite, provided on the side of a surface in sliding contact with a magnetic recording medium and backward core parts 22A and 22B consisting of polucrystal ferrite, and magnetic gap abutting surfaces QA and QB of these core halves 20A and 20B are formed with metalline soft magnetic films 24 of high saturation magnetic flux density respectively. Areas on the side of backward parts of the magnetic gap abutting surfaces QA and QB respectively are formed wider than the forward side, while trapezoidal parts 22A-1 and 22B-1 as partial surfaces of the backward core parts 22A and 22B are exposed in partial parts of the metalline soft magnetic films 24 on the backward side respectively, thus improving magnetic efficiency of the backward core parts 22A and 22B and enhancing reproducing efficiency, etc.

9. 发明专利

JPH08235522A MAGNETIC HEAD 失效
公开(公告)号：JPH08235522A
公开(公告)日：1996-09-13
申请号：JP6686095
申请日：1995-02-28
申请人： VICTOR COMPANY OF JAPAN
发明人： MINAMI HIROSHI
IPC分类号： G11B5/265 , G11B5/133
摘要： PURPOSE: To provide a magnetic head having excellent reproduced output and wear resistance. CONSTITUTION: This magnetic head is provided with a first head body H10 of which the contact surface with a traveling tape precedes and a second head body H20 which is arranged apart a prescribed spacing from the first head body by mounting C-shaped cores 10, 20 and I-shaped cores 23, 24 as one set via gaps G10, G20 at a rotating body. The magnetic path surfaces of the C- shaped cores of the first and second head bodies are formed as crystal surfaces 110, the tape sliding surfaces as 211 and the gap butt surfaces as 111. On the other hand, the magnetic path surfaces of the I-shaped cores are formed as crystal surfaces 110, the tape sliding surfaces as 211 and the gap butt surfaces as 100. The magnetic head having the good reproducing efficiency and excellent wear resistance is obtd.

10. 发明专利

JPH04302807A COMPOSITE MAGNETIC HEAD 失效
公开(公告)号：JPH04302807A
公开(公告)日：1992-10-26
申请号：JP12197391
申请日：1991-03-29
申请人： VICTOR COMPANY OF JAPAN
发明人： MINAMI HIROSHI , SAKAI KUNIHIDE
IPC分类号： G11B5/133 , G11B5/23
摘要： PURPOSE:To improve brightness (Y)-CAN by respectively specifying the crystal faces of a magnetic path surface and a tape sliding surface. CONSTITUTION:The sliding noise generated from a ferrite single crystal is decreased if the crystal face of the magnetic path formed of a pair of core half bodies 12a, 12b consisting of ferrite single crystal of a metal-in-gap(MIG) head 50A is specified to [110] or [100] and the crystal face of the ferrite single crystal of the tape sliding surface is specified to [100]. Consequently, the composite type magnetic head which can enhance the brightness and can extremely enhance Y-C/N of the high-coercive force tape without impairing the recording characteristics on the long wavelength side of the high-coercive force tape for high densities is obtd.

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