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11. 发明公开

EP0030625A3 Ferrite core magnetic head assembly 失效
标题翻译：铁素体磁头组件
公开(公告)号：EP0030625A3
公开(公告)日：1981-08-26
申请号：EP80107023
申请日：1980-11-14
申请人： International Business Machines Corporation
发明人： Argumedo, Armando Jesus , Brock, George William , Losee, Paul Dee
IPC分类号： G11B05/14 , G11B05/42 , G11B05/60
CPC分类号： G11B5/255 , G11B5/1335 , G11B5/193 , Y10T29/49041 , Y10T29/49055 , Y10T29/49057
摘要： A magnetic head assembly includes a ferrite core (10) sandwiched between two ceramic layers (12, 14). Alumina films (11, 13, 15, 17) are deposited by sputtering on the sides of the ferrite core and on the ceramic layers in one embodiment, and on the ferrite core only in another embodiment, which are then bonded to form an integral head assembly. Slots (20, 22, 24, 26) to provide flying height control are formed in the air bearing surface of the ceramic layers. The process of making the assembly includes the steps of sputter etching the ferrite and ceramic prior to the deposition of the alumina.
摘要翻译：磁头组件包括夹在两个陶瓷层之间的铁氧体磁芯。氧化铝膜通过溅射沉积在铁氧体磁芯的侧面和陶瓷层的一个结构中，并且在铁氧体磁芯上仅在另一结构中沉积，然后将其结合以形成一体的磁头组件。在陶瓷层的空气轴承表面形成有提供飞行高度控制的槽。制造组件的过程包括在氧化铝沉积之前溅射刻蚀铁素体和陶瓷的步骤。

12. 发明授权

EP1291329B1 GLASS COMPOSITION, SEALING GLASS FOR MAGNETIC HEAD AND MAGNETIC HEAD 有权
标题翻译：玻璃组合物中，磁头和磁头封接玻璃
公开(公告)号：EP1291329B1
公开(公告)日：2011-07-20
申请号：EP01926103.1
申请日：2001-05-01
申请人： Panasonic Corporation
发明人： HASEGAWA, Shinya , KANAI, Mikie , TORII, Hideo , KAMIMOTO, Tetsuya
IPC分类号： C03C3/066
CPC分类号： G11B5/1335 , C03C3/066 , C03C8/04 , C03C8/24 , G11B5/1272 , G11B5/1878 , G11B5/193
摘要： A glass composition comprising 0.5 to 14 wt % of SiO2, 3 to 15 wt % of B2O3, 4 to 22 wt % of ZnO, 55 to 90 wt % of Bi2O3, 0 to 4 wt % of Al2O3, 0 to 5 wt % of at least one selected from Li2O, Na2O and K2O, and 0 to 15 wt % of at least one selected from MgO, CaO, SrO and BaO; and a magnetic head using the glass composition. The glass composition is substantially free of lead, and has a low softening point and good water resistance which are sufficient for use in various electronic devices.

13. 发明公开

EP0932898A1 RECORDING AND/OR REPRODUCING DEVICE WITH A MAGNETIC HEAD HAVING AN OPTIMIZED CRYSTAL ORIENTATION, AND MAGNETIC HEAD HAVING AN OPTIMIZED CRYSTAL ORIENTATION 失效
标题翻译：具有改进液晶取向和磁头具有改进的结晶取向磁头记录和/或重放设备
公开(公告)号：EP0932898A1
公开(公告)日：1999-08-04
申请号：EP98900130.0
申请日：1998-01-19
申请人： Koninklijke Philips Electronics N.V.
发明人： TRAXLMAYR, Ulrich , GAISBERGER, Othmar
IPC分类号： G11B5 , G11B15
CPC分类号： G11B5/193 , G11B5/255 , G11B5/40 , G11B5/53 , G11B15/61 , G11B15/62
摘要： Recording and/or reproducing device (1) having at least one magnetic head (8, 9) provided for scanning a magnetic record carrier (6) and having a lead-in core limb (34) and a lead-out core limb (35) each consisting of a monocrystalline ferrite and constituting a transducing gap (37), in which the lead-in core limb (34) has a mechanical main direction (39) in a ∫100⊃-direction of its monocrystalline ferrite, which main direction encloses an acute angle υE with respect to the transducing gap (37), and in which the lead-out core limb (35) has a mechanical main direction (41) in a ∫100⊃-direction of its monocrystalline ferrite, which main direction encloses a second acute angle υA with respect to the transducing gap (37), the two acute angles υE and υA in the magnetic head (8, 9) being determined in such a way that ferrite material is uniformly worn off the two core limbs (34, 35) at essentially the same wear rate (K) when there is a relative movement between a record carrier (6) and the magnetic head (8, 9).

14. 发明公开

EP0851410A3 Magnetic head 失效
标题翻译： Magnetkopf
公开(公告)号：EP0851410A3
公开(公告)日：1999-04-07
申请号：EP97122304.5
申请日：1997-12-17
申请人： SONY CORPORATION
发明人： Tamura, Takashi , Nihei, Yukari , Suzuki, Atsushi , Matsunaga, Toru , Ural, Akira
IPC分类号： G11B5/193
CPC分类号： G11B5/193 , G11B5/133 , G11B5/255
摘要： A magnetic head having excellent abrasion characteristics and a high playback output. The magnetic head is made up of a pair of magnetic core halves (3m,3n) each having a single crystal ferrite (Im,In) at a portion thereof, said magnetic core halves being abutted and joined to each other, with a magnetic gap (g) being formed between abutment surfaces of these magnetic core halves. The single crystal ferrite has its medium sliding surface, slidingly contacted with a magnetic recording medium, as a (411) plane, and also has the abutment surface as a (122) plane.
摘要翻译：具有优异的磨损特性和高回放输出的磁头。磁头由其一部分具有单晶铁氧体（Im，In）的一对磁芯半部（3m，3n）构成，所述磁芯半体彼此抵接并接合，磁隙（g）形成在这些磁芯半部的邻接表面之间。单晶铁氧体具有中等滑动面，与磁记录介质滑动接触，作为（411）面，并且还具有邻接面作为（122）面。

15. 发明公开

EP0795852A2 Magnetic head 失效
标题翻译： Magnetkopf
公开(公告)号：EP0795852A2
公开(公告)日：1997-09-17
申请号：EP97104310.4
申请日：1997-03-13
申请人： SONY CORPORATION
发明人： Matsunaga, Toru , Kaneyama, Naoyuki , Saito, Takehiko , Hayakawa, Masatoshi
IPC分类号： G11B5/187 , G11B5/193
CPC分类号： G11B5/1878 , G11B5/1871 , G11B5/193 , G11B33/08
摘要： Sliding noise characteristics can be considerably improved without degrading electromagnetic conversion characteristics and abrasion resistance characteristics in a recording/reproducing operation. A depth (H) of a contact width regulating groove (21) is set to be smaller than a contact width (W) of a magnetic recording medium sliding surface (a), and is set to a predetermined value of 25 µm or more and 45 µm or less. A depth (H) of the contact regulating groove is set to a predetermined value of 37±12 µm, the contact width (W) on the magnetic recording medium sliding surface (a) is set to a predetermined value of 55±6 µm, and a value (R) of a corner portion (51a) of the contact width regulating groove is set to a predetermined value of 16 µm or less.
摘要翻译：滑动噪声特性可以显着提高，而不会降低记录/再现操作中的电磁转换特性和耐磨性。接触宽度调节槽（21）的深度（H）设定为小于磁记录介质滑动面（a）的接触宽度（W），设定为25μm以上的规定值 45亩以下。接触调节槽的深度（H）设定为37 +/-12μm的预定值，磁记录介质滑动面（a）上的接触宽度（W）被设定为预定值为55+ /-6μm，接触宽度调节槽的角部（51a）的值（R）设定为16μm以下的规定值。

16. 发明公开

EP0541156A1 Magnetic head having a core portion of polycrystalline MnZn ferroferrite 失效
标题翻译： Magnetkopf mit Kernteil aus polykristallinem MnZn-Ferroferrit。
公开(公告)号：EP0541156A1
公开(公告)日：1993-05-12
申请号：EP92203306.3
申请日：1992-10-28
申请人： Philips Electronics N.V.
发明人： Johnson, Mark Thomas , Roozeboom, Freddy , Van Delden, Martinus Hermanus Wilhelmus Maria
IPC分类号： G11B5/133 , G11B5/193
CPC分类号： G11B5/1274 , G11B5/00813 , G11B5/02 , G11B5/133 , G11B5/193 , G11B5/3103
摘要： Magnetic heads comprising at least one core portion of polycrystalline MnZn-ferroferrite material exhibit a very low so-called "rubbing noise" level if the average grain size of the material ranges between 0.2 and 3.0 micrometers. The rubbing noise level of these heads is even lower than the electronic noise level if the average grain size of the material ranges between 0.5 and 2.0 micrometers. By virtue thereof, said heads can very suitably be used in the frequency range from 5 to 100 MHz.
摘要翻译：如果材料的平均晶粒尺寸在0.2和3.0微米之间，则包含多晶MnZn-铁铁素体材料的至少一个核心部分的磁头显示出非常低的所谓的“摩擦噪声”水平。如果材料的平均晶粒尺寸在0.5和2.0微米之间，这些磁头的摩擦噪声水平甚至低于电子噪声电平。因此，所述磁头可以非常适合地在5至100MHz的频率范围内使用。

17. 发明授权

EP0149509B1 Magnectic head core and process of manufacturing the same 失效
标题翻译：磁头及其制造方法
公开(公告)号：EP0149509B1
公开(公告)日：1991-07-31
申请号：EP85300017.2
申请日：1985-01-02
申请人： NGK INSULATORS, LTD.
发明人： Matsuzawa, Soichiro
IPC分类号： G11B5/133 , G11B5/193 , G11B5/23
CPC分类号： G11B5/232 , G11B5/133 , G11B5/193 , Y10T29/49048 , Y10T29/49057

18. 发明授权

EP0116451B1 Magnetic transducer structure having reduced track width and a method of manufacturing thereof 失效
标题翻译：具有减小轨迹宽度的磁传感器结构及其制造方法
公开(公告)号：EP0116451B1
公开(公告)日：1991-05-29
申请号：EP84300703.0
申请日：1984-02-03
申请人： AMPEX CORPORATION
发明人： Schiller, Edward
IPC分类号： G11B5/127 , G11B5/187 , G11B5/193 , G11B5/29
CPC分类号： B29C70/745 , B29C43/18 , G11B5/187 , G11B5/193 , G11B5/295 , Y10T29/49048 , Y10T29/49057

19. 发明公开

EP0221583A3 Method of manufacturing magnetic head cores 失效
标题翻译：制造磁头的方法
公开(公告)号：EP0221583A3
公开(公告)日：1987-05-27
申请号：EP86201661
申请日：1986-09-24
申请人： N.V. Philips' Gloeilampenfabrieken
发明人： Verbunt, Johannes Petrus Maria
IPC分类号： G11B05/133 , G11B05/193 , G11B05/23
CPC分类号： G11B5/1335 , G11B5/193 , G11B5/232 , Y10T29/49048 , Y10T29/49055 , Y10T225/304
摘要： A plurality of separate magnetic head cores (3) is cut from a one- piece ferrite core block. A winding aperture (6) is provided in each magnetic head core. A fracture (7) in the cross-section of the material of the head core is generated between the winding aperture and the future tape contact face during or after the winding aperture is provided. A non-magnetic material in a liquid form is provided between the fracture faces and is converted to the solid form.

20. 发明公开

EP0149509A3 Magnectic head core and process of manufacturing the same 失效
标题翻译：磁头及其制造方法
公开(公告)号：EP0149509A3
公开(公告)日：1987-04-01
申请号：EP85300017
申请日：1985-01-02
申请人： NGK INSULATORS, LTD.
发明人： Matsuzawa, Soichiro
IPC分类号： G11B05/133 , G11B05/193 , G11B05/23
CPC分类号： G11B5/232 , G11B5/133 , G11B5/193 , Y10T29/49048 , Y10T29/49057
摘要： A magnetic head core consisting of plural ferrite core elements (2,4) bonded together into a generally annular core assembly which has a magnetic gap (10) defined by opposed portions of the core elements and further has at least one groove (24) which is formed in the gap-defining opposed portions in the direction of sliding movement of a recording medium so as to define at least one track (18) which slidably contacts the recording medium moving in the vicinity of the magnetic gap. To render manufacture easy and to achieve good alignment of the track parts on the respective core elements, the groove (24) is inclined in the direction from one of the opposed portions to the other such that a depth D thereof at the position of the magnetic gap (10) is greater than the depth (d) of the magnetic gap. The inclined groove (24) is cut after the two core elements (2, 4) are bonded into the integral core assembly. Two core integral core assemblies may be bonded together into an integral composite core structure, such that the inclined grooves in one of the two core elements are aligned with those in the other core element. The two integral core assemblies are bonded with glass when the inclined grooves are filled with molten glass.

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