专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH09212822A THIN FILM MAGNETIC HEAD AND ITS MANUFACTURE 失效
公开(公告)号：JPH09212822A
公开(公告)日：1997-08-15
申请号：JP2091696
申请日：1996-02-07
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： SHIBAYAMA YUKO , KONISHI KATSUO , YANAGIHARA HITOSHI , TSUCHIYA TOSHIO , NAGATOMO HIROYUKI , UEMURA NORIO
IPC分类号： G11B5/31
摘要： PROBLEM TO BE SOLVED: To contrive to make a pattering process, etc., as post-bias-sputtering processes highly precise and simplified, and improve the yield of it by providing a dummy coil patternand a bonding pad. SOLUTION: At the time of forming signal coils 5 and 5', the dummy coil patterns 6 and 6' with approximately the same width and intervals as coil pattern are formed. Then, a coil connecting part 10 which is wider in pattern width and a pattern of the bonding pads 11 in pattern aggregate with approximately the same width and internals as the signal coils 5 an 5' are formed. Consequently, since the flatness of insulating layers 4 and 4' on the signal coils 5 and 5' after bias sputtering are continuously obtained, the pattering process of a care connecting through hole, the coil connecting part 10 and a removing process of the insulating layers 4 and 4' on the coil bonding pads 11 are made highly precise, simplified and the yield is improved accordingly.

2. 发明专利

JPH08106613A PERPENDICULAR MAGNETIC RECORDING TYPE THIN-FILM MAGNETIC HEAD 失效
公开(公告)号：JPH08106613A
公开(公告)日：1996-04-23
申请号：JP24102894
申请日：1994-10-05
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： SHIBAYAMA YUKO , KONISHI KATSUO , YANAGIHARA HITOSHI , NAGATOMO HIROYUKI , TSUCHIYA TOSHIO , ABE MITSUO , UEMURA NORIO
IPC分类号： G11B5/31
摘要： PURPOSE: To form a magnetic films for poles on a good and smooth surface and to obtain a magnetic head having high reliability by forming the pole film on the magnetic film of a very small film thickness formed on cores and embedded insulating layer. CONSTITUTION: After the nonmagnetic insulating layer consisting of SiO2 , Al2 O3 , etc., is formed by sputtering on a magnetic substrate 1, a coil conductor 5 consisting of Cr/Cu/Cr (Cr: joint surface) is formed with the coil insulator and thereafter, core connecting through-holes 6 are formed. The film of a Co-Ta-Zr based amorphous allay is formed by sputtering and is patterned to form the magnetic cores 7 and thereafter, the film of a nonmagnetic insulating material 3 of forsterite, etc., is formed by sputtering. The insulating layer 3 is so flattened as to remain on the cores by lapping for flattening by mechanical polishing and etch back, etc., by ion etching and further, the nonmagnetic insulating layers of the very small film thickness on the cores are removed. The magnetic film for poles is then formed by sputtering, etc., and is patterned to form the poles.

3. 发明专利

JPH087222A THIN FILM MAGNETIC HEAD AND ITS PRODUCTION 失效
公开(公告)号：JPH087222A
公开(公告)日：1996-01-12
申请号：JP13551494
申请日：1994-06-17
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： YANAGIHARA HITOSHI , SHIBAYAMA YUKO , KONISHI KATSUO , NAGATOMO HIROYUKI , SAITO MASAKATSU , GOTO MAKOTO
IPC分类号： G11B5/31
摘要： PURPOSE:To obtain a thin film magnetic head having high density and high aspect ratio of coils. CONSTITUTION:This thin film head consists of an upper magnetic core 2, a lower magnetic core 2, and a conductive coil 5 between these cores. When an insulating layer 4 is formed, a coating-type insulating material 10 is applied so as to spuriousely mitigate the inclined angle theta of the outer coil edge, and an insulating layer 11 is formed by sputtering or vacuum vapor deposition. Since cracks and voids produced in an insulating layer due to sputtering or vacuum vapor deposition are influenced by the inclined angle 9 of the outer coil edge, cracks and voids are not produced by spuriousely decreasing the angle theta. Thus, the obtd. coil has high density and high aspect ratio.

4. 发明专利

JPH07220290A OPTICAL RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH07220290A
公开(公告)日：1995-08-18
申请号：JP1156494
申请日：1994-02-03
申请人： HITACHI LTD
发明人： ONO MASAHARU , MASUDA NORIAKI , KONISHI KATSUO , NAGATOMO HIROYUKI
IPC分类号： G11B11/10 , G11B7/00 , G11B7/003 , G11B7/0033 , G11B7/085 , G11B7/09 , G11B7/14 , G11B11/105 , G11B15/18
摘要： PURPOSE:To provide a small optical recording/reproducing device having large capacity per unit volume. CONSTITUTION:Optical pickups 12a, 12b are mounted and a recording medium 3 is interposed within a magnetic recording head 15. The relevant optical recording/reproducing head is mounted on a rotary mechanism and a track 16 is scanned by means of the optical recording/reproducing head while changing a reletive position between the recording medium 3 and the rotating device. An address is recorded at the beginning of scanning track and a holding signal is recorded at the end of scanning of each track. The optical recording/ reproducing head arranges a recording head and a reproducing head separating them by the interval of a scanning track and performs recording while reproducing a recorded track by the reproducing head. At the time of recording or reproducing, if the signal is incorrect then it is corrected with reference to the track address. Tracking means 14a, 14b and focusing means 24a, 24b are operated by detecting the holding signal. The scanning of the next track is discriminated by an address and the track is decided. Thereafter, tracking is performed for recording/reproducing.

5. 发明专利

JPH06243429A THIN-FILM MULTICHANNEL MAGNETIC HEAD 失效
公开(公告)号：JPH06243429A
公开(公告)日：1994-09-02
申请号：JP2807993
申请日：1993-02-17
申请人： HITACHI LTD
发明人： SAITO MASAKATSU , KONISHI KATSUO , NAGATOMO HIROYUKI , SHIBAYAMA YUKO , YANAGIHARA HITOSHI , IKEDA YOSHIO
IPC分类号： G11B5/265 , G11B5/29 , G11B5/31 , G11B5/48
摘要： PURPOSE:To provide a thin-film multichannel magnetic head of a horizontal type which realizes good packaging performance and can deal with an arbitrary number of tracks. CONSTITUTION:The number of tracks per 1 piece of multichannel heads is so constituted that the number of tracks in a track width direction is max. 2 pieces and the number of tracks in a traveling direction is max. 4 pieces. Further, the thin-film multichannel magnetic heads of a horizontal type formed by developing the number of tracks as much as needed for a system at max. two tracks in the track width direction and the balance in the traveling direction are formed as chips at every number of the tracks at which the difference in gap depth Gd is of no problem in a wafer state Plural pieces of the head chips are mounted on one piece of a head base 10. Then, the sliding surfaces are provided with an optimum round shape and, therefore, the good packaging performance is realized. The dealing with the arbitrary number of the tracks is thus possible while track arrangement, azimuth angles, etc., are maintained with high accuracy.

6. 发明专利

JPH06119601A MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH06119601A
公开(公告)日：1994-04-28
申请号：JP26841292
申请日：1992-10-07
申请人： HITACHI LTD
发明人： NAGATOMO HIROYUKI , KONISHI KATSUO
IPC分类号： G11B5/02
摘要： PURPOSE:To eliminate the necessity of a precise drum installation and to prevent signal deterioration by transmitting signals between a rotating drum and a fixed drum and performing the signal transmission with an optical fiber CONSTITUTION:A magnetic head device consists of a rotating drum 1 and a fixed drum 2, magnetic heads 7 and 8 are provided on the drum 1 and signal recording and reproducing are performed by diagonally scanning the magnetic tape wound on the drums 1 and 2. The magnetic heads 7 and 8 are connected to a signal amplifier 10 and are connected to a signal dividing circuit 12 and a light receiving element 5. The magnetic heads 7 and 8 are also connected to a signal amplifier 11 and are connected to a signal synthesizing circuit 13 and a light emitting element 3. Light emitting elements 4 and 6 are provided on the fixed drum 2, an optical fiber 9 is provided in a rotational shaft 15 of the drum 1 and the center shaft of the fiber 9 is made coincident with the rotational center of the shaft 15. Power transmission to the drum 1 is performed by a rotary transformer 14.

7. 发明专利

JPH05250614A 失效
公开(公告)号：JPH05250614A
公开(公告)日：1993-09-28
申请号：JP4667392
申请日：1992-03-04
申请人： HITACHI LTD
发明人： SAITO MASAKATSU , KONISHI KATSUO , NAGATOMO HIROYUKI , AOKI SHIGEO
IPC分类号： G11B5/127 , G11B5/133 , G11B5/23
摘要： PURPOSE:To minimize the lowering of the permeability of a metallic magnetic core due to eddy current and to obtain a high efficiency magnetic head. CONSTITUTION:A metallic magnetic thin film core is composed of a first metallic magnetic core contg. an interlaminar insulating film in a direction almost perpendicular to a gap and a second metallic magnetic core made of a multilayered film except parts near the poles of the gap and contg. the interlaminar insulating film of the multilayered film exposed to the sliding face in a direction nonparallel to the gap, or the position of a gap is made as close as possible to a ferrite core as one of cores, the longer first metallic magnetic core is made of a multilayered film contg. an interlaminar insulating film in a direction almost parallel to the gap and the shorter second magnetic core is made of a single-layered film.

8. 发明专利

JPH04195810A THIN FILM MAGNETIC HEAD 失效
公开(公告)号：JPH04195810A
公开(公告)日：1992-07-15
申请号：JP32272990
申请日：1990-11-28
申请人： HITACHI LTD
发明人： OGURA YUKIKO , KAWANO KANJI , NAGATOMO HIROYUKI , SAITO MASAKATSU , MIURA YOSHITSUGU , AOKI SHIGEO
IPC分类号： G11B5/31
摘要： PURPOSE:To obtain good contact with a tape with time by processing a head front part to satisfy such a relation between a taper angle theta1 from a tape sliding surface to at least a gap depth zero point and a taper angle theta2 in the rear of this as theta1

9. 发明专利

JPH03225611A PRODUCTION OF THIN-FILM MAGNETIC HEAD 失效
公开(公告)号：JPH03225611A
公开(公告)日：1991-10-04
申请号：JP1900390
申请日：1990-01-31
申请人： HITACHI LTD
发明人： SAITO MASAKATSU , SHIBAYAMA YUKO , NAGATOMO HIROYUKI , KONISHI KATSUO , AOKI SHIGEO
IPC分类号： G11B5/31
摘要： PURPOSE:To obtain the above head which obviates the generation of the misregistration between thin-film layers and projections and the generation of unequal wear by patterning the fresh thin-film layers on the lower core projections simultaneously with the projections. CONSTITUTION:Grooves are dug in a nonmagnetic substrate 1 and a magnetic film consisting of CoNbZr, etc., is formed by sputtering to flatten the grooves. SiO2 is then sputtered at a prescribed thickness to form the thin-film layer 3. The thin-film layer 3 and the lower magnetic core 2 are simultaneously patterned by ion etching, by which the projections 2a, 2b of the front part and the rear part and the thin-film patters 3a, 3b thereon are formed. An insulating film 41 consisting of SiO2, etc., is formed as the insulating layer of the 1st coil and after a coil conductor 5 consisting of Cr/Cu/Cr is formed, an insulating film 42 of the 2nd coil consisting of the same material as the material of the insulating 41 is sputtered to flatten the surface. The core projections 2a, 2b are then registered on the insulating layers 41, 42 and through- holes 6a, 6b are formed by ion etching. The remaining of the thin-film patterns 3a, 3b is etched away. Cr or the like is then formed as a gap material 7 and thereafter, the same material as the material of the lower magnetic core is sputtered and etched to form the upper magnetic core 8. A protective film is then formed.

10. 发明专利

JPH01248306A THIN FILM MAGNETIC HEAD 失效
公开(公告)号：JPH01248306A
公开(公告)日：1989-10-03
申请号：JP7430888
申请日：1988-03-30
申请人： HITACHI LTD
发明人： NAGATOMO HIROYUKI , SAITO MASAKATSU , KUREBAYASHI MASAAKI , KONISHI KATSUO , ISHIHARA KIYOSHI
IPC分类号： G11B5/31
摘要： PURPOSE:To stably and surely perform electrical connection by increasing the margin of an etching time by forming a through hole where a remainder part from which a part of a lower layer electrode pattern is eliminated forms an oblique plane, and connecting an upper layer electrode pattern to the lower layer electrode pattern at a part including the oblique plane. CONSTITUTION:The through holes 11 and 12 are formed so as to form the oblique planes 10a and 10b on the remainder part of the lower layer electrode patterns 8a and 8b by eliminating a part of the electrodes 8a and 8b, and the upper layer electrodes 9a and 9b are connected electrically to the lower layer electrodes 8a and 8b at the part including the oblique plane parts 10a and 10b. Therefore, the oblique planes where connected lower layer electrode patterns 8a and 8b are exposed can be formed surely even when a certain degree of excess or shortage exists in the etching time of the through holes 11 and 12, and no insulating film remains on the upper planes of the lower layer electrode patterns 8a and 8b. In such a way, it is possible to set the large margin of the etching time and to perform connection between the upper and the lower layer electrodes stably and surely.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式