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1.发明授权Method of producing head core slider for rigid magnetic disk drive, utilizing laser-induced etching 失效用于刚性磁盘驱动器的磁芯滑块的制造方法，利用激光诱导蚀刻
公开(公告)号：US4948460A
公开(公告)日：1990-08-14
申请号：US409946
申请日：1989-09-20
CPC分类号： C04B41/009 , B23K26/362 , C04B41/5338 , C04B41/91 , G11B5/1871 , G11B5/1878 , G11B5/6005 , Y10T29/49041 , Y10T29/49052 , Y10T29/49055
摘要： A method of producing a magnetic head core slider including integrally formed slider body and yoke portion. The slider body has two parallel air bearing portions, while the yoke portion has a track portion. The slider body and yoke portion cooperatively provide a magnetic gap open in the track portion. The core slider is prepared from an integral ferrite bar consisting of a first and a second ferrite block which give the slider body and the yoke portion, respectively. Track-defining grooves are formed by laser-induced etching in one surface of the bar, such that the grooves extend across the interface of the bonded two blocks. The grooves define the width of the track portion. An etching mask is applied to cover portions of the bar corresponding to the air bearing portions and the track portion. The masked surface of the bar is chemically etched to form the air bearing portions, and a track protrusion including the track portion, such that the air bearing portion and the track protrusion have the same height.
摘要翻译： 一种制造包括一体形成的滑块体和磁轭部分的磁头磁芯滑块的方法。 滑块体具有两个平行的空气轴承部分，而轭部具有轨道部分。 滑块体和轭部协作地在磁道部分中提供开放的磁隙。 芯滑块由分别给予滑块体和轭部的第一铁氧体块和第二铁氧体块组成的铁素体棒制成。 通过在棒的一个表面中的激光诱导蚀刻形成轨道限定槽，使得槽延伸穿过结合的两个块的界面。 凹槽限定轨道部分的宽度。 施加蚀刻掩模以覆盖对应于空气轴承部分和轨道部分的条的部分。 棒的被掩模的表面被化学蚀刻以形成空气轴承部分，以及包括轨道部分的轨道突起，使得空气轴承部分和轨道突起具有相同的高度。
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公开(公告)号：US4982065A
公开(公告)日：1991-01-01
申请号：US399958
申请日：1989-08-29
申请人： Hideto Sandaiji , Fuminori Takeya
发明人： Hideto Sandaiji , Fuminori Takeya
CPC分类号： H01F41/0206 , B23K26/0093 , B23K26/122 , B23K26/364 , C23F1/02 , G11B5/187 , G11B5/1871
摘要： A core for magnetic head, which has a groove depth of at least 10 .mu.m with a dimensional accuracy not lower than .+-.2 .mu.m in the groove for defining the track of the core, can be obtained by subjecting a gapped bar made of ferrite and/or Sendust to a laser-induced etching wherein a laser beam having a focused beam diameter of not larger than 50 .mu.m, preferably not larger than 20 .mu.m, and a laser power P in a specified range is irradiated at a scanning speed V that is within a range between 2 .mu.m/sec and 200 .mu.m/sec and delimited by the laser power P, in a phosphoric acid or alkali metal hydroxide aqueous solution.
摘要翻译： 在用于限定芯的轨道的沟槽中，具有至少10μm的槽深度，尺寸精度不低于+/-2μm的磁头的芯可以通过使一个有间隙的棒 的铁素体和/或Sendust对激光诱导蚀刻，其中聚焦束直径不大于50μm，优选不大于20μm的激光束和在特定范围内的激光功率P被照射在 在磷酸或碱金属氢氧化物水溶液中的扫描速度V在2微米/秒至200微米/秒的范围内并由激光功率P界定。
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3.发明授权
公开(公告)号：US5107382A
公开(公告)日：1992-04-21
申请号：US616085
申请日：1990-11-20
CPC分类号： G11B5/1272 , G11B5/1871 , G11B5/193 , Y10T29/49041 , Y10T29/49052 , Y10T29/49055
摘要： A head core slider for a rigid magnetic disk drive, including a slider body, a track portion, a yoke portion and a narrow stepped portion. The slider body has two spaced-apart parallel air bearing portions, and the track portion is formed integrally with at least one of the bearing portions, so as to extend from one end of the bearing portion in the direction of length of the bearing portion. The track portion has the same height as the bearing portion, and a width smaller than that of the bearing portion. The yoke portion is formed integrally with the track portion, so as to extend from one end of the track portion remote from the bearing portion, and has a protrusion of the same height as the track portion. The width of the protrusion is smaller than that of the bearing portion and larger than that of the track portion. The stepped portion is formed so as to surround at least the track portion and the protrusion of the yoke portion, and has a surface which is spaced apart from top surfaces of the track portion and the protrusion by a distance nearly equal to the predetermined height. The bearing, track and stepped portions and the protrusion are formed by etching the surfaces of two bonded ferrite blocks, through an etching mask pattern corresponding to the desired configuration to be formed.
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公开(公告)号：US5138508A
公开(公告)日：1992-08-11
申请号：US655150
申请日：1991-02-14
CPC分类号： G11B5/1871 , G11B5/2651 , Y10T29/49052 , Y10T29/49057
摘要： A composite magnetic head core with a writing/reading track and two erasing tracks, including a first ferrite block, and a second and a third ferrite block bonded to opposite surfaces of the first block interposed therebetween. The opposite abutting surfaces of the first block have respective first and second recessed portions, and a first rectangular protrusion and two second rectangular protrusions which protrude from the first and second recessed portions, respectively. The first protrusion is positioned between the two second protrusions in a direction of width of the writing/reading and erasing tracks. The first protrusion cooperates with the second block, to define a writing/reading magnetic gap of the writing/reading track, while the second protrusions cooperate with the third block, to define two erasing magnetic gaps of the erasing tracks. The first protrusion has a width defining the width of the writing/reading track, and a longitudinal end defining a depth of the writing/reading magnetic gap. Similarly, each second protrusion has a width defining the width of the erasing tracks, and a longitudinal end defining a depth of the erasing magnetic gaps. The protrusions are formed by etching the opposite surfaces of the first block through appropriate etching masks.
摘要翻译： 具有写入/读取轨道和两个擦除轨道的复合磁头芯，包括第一铁氧体块，以及粘结到插入其间的第一块的相对表面的第二和第三铁氧体块。 第一块的相对的邻接表面具有相应的第一和第二凹部，以及分别从第一凹部和第二凹部突出的第一矩形突起和第二矩形突起。 第一突起沿着写入/读取和擦除轨迹的宽度的方向位于两个第二突起之间。 第一突起与第二块配合以限定写入/读取轨迹的写入/读取磁隙，而第二突起与第三块配合，以限定擦除轨迹的两个擦除磁隙。 第一突起具有限定写入/读取轨迹的宽度的宽度，以及限定写入/读取磁隙的深度的纵向端。 类似地，每个第二突起具有限定擦除轨迹的宽度的宽度和限定擦除磁隙的深度的纵向端。 通过适当的蚀刻掩模蚀刻第一块的相对表面来形成突起。
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公开(公告)号：US5014414A
公开(公告)日：1991-05-14
申请号：US337966
申请日：1989-04-12
CPC分类号： G11B5/1871 , G11B5/2651 , Y10T29/49052 , Y10T29/49055
摘要： A composite magnetic head core with a writing/reading track and two erasing tracks, including a first ferrite block, and a second and a third ferrite block bonded to opposite surfaces of the first block interposed therebetween. The opposite abutting surfaces of the first block have respective first and second recessed portions, and a first rectangular protrusion and two second rectangular protrusions which protrude from the first and second recessed portions, respectively. The first protrusion is positioned between the two second protrusions in a direction of width of the writing/reading and erasing tracks. The first protrusion cooperates with the second block, to define a writing/reading magnetic gap of the writing/reading track, while the second protrusions cooperate with the third block, to define two erasing magnetic gaps of the erasing tracks. The first protrusion has a width defining the width of the writing/reading track, and a longitudinal end defining a depth of the writing/reading magnetic gap. Similarly, each second protrusion has a width defining the width of the erasing tracks, and a longitudinal end defining a depth of the erasing magnetic gaps. The protrusions are formed by etching the opposite surfaces of the first block through appropriate etching masks.
摘要翻译： 具有写入/读取轨道和两个擦除轨迹的复合磁头磁芯，包括第一铁氧体块，以及第二和第三铁氧体块，其结合到插入其间的第一块的相对表面。 第一块的相对的邻接表面具有相应的第一和第二凹部，以及分别从第一凹部和第二凹部突出的第一矩形突起和第二矩形突起。 第一突起沿着写入/读取和擦除轨迹的宽度的方向位于两个第二突起之间。 第一突起与第二块配合以限定写入/读取轨迹的写入/读取磁隙，而第二突起与第三块配合，以限定擦除轨迹的两个擦除磁隙。 第一突起具有限定写入/读取轨迹的宽度的宽度，以及限定写入/读取磁隙的深度的纵向端。 类似地，每个第二突起具有限定擦除轨迹的宽度的宽度和限定擦除磁隙的深度的纵向端。 通过适当的蚀刻掩模蚀刻第一块的相对表面来形成突起。
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6.发明授权Glass-ceramics having hexacelsian as a primary crystal phase, magnetic disk substrate and magnetic disk 失效具有六面体作为主晶相的玻璃陶瓷，磁盘基板和磁盘公开(公告)号：US06589893B2
公开(公告)日：2003-07-08
申请号：US09821959
申请日：2001-03-30
IPC分类号： C03C1006
CPC分类号： C03C10/0045
摘要： A glass-ceramic has a hexacelsian as a primary crystal phase and is characterized by satisfying a relation of 0≦I(101)/I(110)≦1.5 when a diffraction intensity of (101) face of hexacelsian in an X-ray diffraction is I(101) and a diffraction intensity of (110) face thereof is I(110).
摘要翻译： 玻璃陶瓷具有六面体作为主晶相，其特征在于，当X射线衍射仪中的六面体的（101）面的衍射强度为0 <= I（101）/ I（110）<= 1.5时， X射线衍射为I（101），（110）面的衍射强度为I（110）。
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7.发明授权Magnetic head core having ferrite member reinforced by non-magnetic material 失效具有由非磁性材料增强的铁氧体构件的磁头芯
公开(公告)号：US5486969A
公开(公告)日：1996-01-23
申请号：US258836
申请日：1994-06-13
申请人： Fuminori Takeya , Tomio Suzuki
发明人： Fuminori Takeya , Tomio Suzuki
CPC分类号： G11B5/1272 , G11B5/133 , G11B5/17
摘要： A magnetic head core for a magnetic head including a first and a second ferrite member butted and bonded together to form an annular, closed magnetic path around a coil-winding groove, and a coil attached to a coil-winding portion of the first ferrite member. The first and second ferrite members provide a sliding surface to which a magnetic recording medium is opposed, and which extends across the first and second ferrite members. A non-magnetic material is secured to at least one of an inner surface and an outer surface of the coil-winding portion. The non-magnetic material is located below the sliding surface, and is spaced apart from the magnetic recording medium with the sliding surface disposed between the non-magnetic material and the magnetic recording medium.
摘要翻译： 一种用于磁头的磁头芯，其包括第一和第二铁氧体部件，所述第一和第二铁氧体部件对接并接合在一起，以在线圈绕线槽周围形成环形的闭合磁路;以及线圈，其附接到所述第一铁氧体部件的线圈绕组部分 。 第一铁氧体构件和第二铁氧体构件提供与磁记录介质相对的滑动表面，并且延伸穿过第一和第二铁氧体构件。 非磁性材料被固定到线圈绕组部分的内表面和外表面中的至少一个。 非磁性材料位于滑动表面下方，并且与磁记录介质间隔开，其中滑动表面设置在非磁性材料和磁记录介质之间。
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公开(公告)号：US5012572A
公开(公告)日：1991-05-07
申请号：US322161
申请日：1989-03-13
CPC分类号： G11B5/1272 , G11B5/1871 , G11B5/193 , Y10T29/49041 , Y10T29/49052 , Y10T29/49055
摘要： A head core slider for a rigid magnetic disk drive, and a method of producing the same. The core slider includes a slider body, a track portion, a yoke portion and a narrow stepped portion. The slider body has two spaced-apart parallel air bearing portions, and the track portion is formed integrally with at least one of the bearing portions, so as to extend from one end of the bearing portion in the direction of length of the bearing portion. The track portion has the same height as the bearing portion, and a width smaller than that of the bearing portion. The yoke portion is formed integrally with the track portion, so as to extend from one end of the track portion remote from the bearing portion, and has a protrusion of the same height as the track portion. The width of the protrusion is smaller than that of the bearing portion and larger than that of the track portion. The stepped portion is formed so as to surround at least the track portion and the protrusion of the yoke portion, and has a surface which is spaced apart from top surfaces of the track portion and the protrusion by a distance nearly equal to the predetermined height. The bearing, track and stepped portions and the protrusion are formed by etching the surfaces of two bonded ferrite blocks, through an etching mask pattern corresponding to the desired configuration to be formed.
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9.发明授权Substrates for magnetic discs, magnetic discs and process for producing magnetic discs 失效用于磁盘，磁盘的基板和用于制造磁盘的工艺
公开(公告)号：US6086977A
公开(公告)日：2000-07-11
申请号：US793255
申请日：1997-02-21
申请人： Tomio Suzuki , Fuminori Takeya , Masahiro Abe
发明人： Tomio Suzuki , Fuminori Takeya , Masahiro Abe
CPC分类号： G11B5/7315 , C03C10/0027 , C03C21/001 , C03C21/005 , G11B5/8404 , Y10T428/24355
摘要： A magnetic disc substrate is provided, which includes a magnetic disc substrate body made of glass and is characterized in that a metal element capable of absorbing light is present in at least a surface portion of the magnetic disc substrate body, and a texture is formed on a surface of the magnetic disc substrate body. Ions of the metal element are dispersed in the surface portion of the magnetic disc substrate, or the metal element is contained in a composition of the glass constituting the magnetic disc substrate in the form of an oxide. The glass is preferably a crystallized glass a Li.sub.2 O--Al.sub.2 O.sub.3 --SiO.sub.2 based crystallized glass, which particularly preferably contains 65 to 85 wt % of SiO.sub.2, 8 to 15 wt % of Li.sub.2 O, 2 to 8 wt % of Al.sub.2 O.sub.3, 1 to 5 wt % of P.sub.2 O.sub.5 and 1 to 10 wt % of ZrO.sub.2 and has lithium disilicate (Li.sub.2 O.multidot.2SiO.sub.2) as a main crystalline phase.
摘要翻译： PCT No.PCT / JP96 / 01732 Sec。 371日期1997年2月21日 102（e）1997年2月21日PCT PCT 1996年6月21日PCT公布。 公开号WO97 / 01164 日本1997年1月9日提供一种磁盘基板，其包括由玻璃制成的磁盘基板主体，其特征在于，在所述磁盘基板主体的至少表面部分中存在能够吸收光的金属元件， 在磁盘基板主体的表面上形成纹理。 金属元素的离子分散在磁盘基板的表面部分中，或者金属元素以氧化物的形式包含在构成磁盘基板的玻璃的组成中。 玻璃优选为Li2O-Al2O3-SiO2系微晶玻璃的结晶化玻璃，特别优选含有65〜85重量％的SiO 2，8〜15重量％的Li 2 O，2〜8重量％的Al 2 O 3，1〜5重量％ 的P 2 O 5和1〜10重量％的ZrO 2，并且具有二硅酸锂（Li 2 O x SiO 2）作为主要结晶相。
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公开(公告)号：US5025343A
公开(公告)日：1991-06-18
申请号：US564186
申请日：1990-08-08
申请人： Shinzi Iida , Fuminori Takeya , Shinya Aoki
发明人： Shinzi Iida , Fuminori Takeya , Shinya Aoki
CPC分类号： G11B5/232 , G11B5/1335 , G11B5/193 , Y10T29/49048 , Y10T29/49055
摘要： A magnetic head core having a generally annular structure with an inner coil-winding aperture, and a magnetic gap which has a predetermined width and which is formed so as to extend in a direction across the annulus of the annular structure. The annular structure is formed by a plurality of ferrite core elements bonded together by direct solid-solid reaction bonding, with a non-magnetic layer of SiO or SiO.sub.2 interposed between two opposed portions of the ferrite core elements which define the magnetic gap. The non-magnetic layer defines the width of the magnetic gap.
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