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    • 1. 发明申请
    • Magnetic head and method of manufacturing the same
    • 磁头及其制造方法
    • US20070195454A1
    • 2007-08-23
    • US11650336
    • 2007-01-05
    • Hisashi KimuraAtsushi KatoNorihiro OokawaKikuo Kusukawa
    • Hisashi KimuraAtsushi KatoNorihiro OokawaKikuo Kusukawa
    • G11B5/147
    • G11B5/1278G11B5/3163
    • If the length of a track-defining section from an air bearing surface varies due to tolerance during a head manufacturing process, the recording magnetic field changes, which involves the variation of the track width to be recorded on the medium. In accordance with an embodiment of the present invention, the main magnetic pole of a magnetic head includes a track-defining section shaped in trapezoid and a magnetic flux guiding section formed in trapezoid, as viewed from above. The track-defining section is formed such that its width parallel to the air bearing surface (ABS) increases at the rate of 10 to 20% with respect to its height-direction length. The rate of 10 to 20% is a range in which the shape is properly controllable taking into account the variations resulting from the tolerance of the head manufacturing process.
    • 如果来自空气轴承表面的轨道限定部分的长度由于头部制造过程中的公差而变化,则记录磁场改变,其涉及要记录在介质上的轨道宽度的变化。 根据本发明的实施例,磁头的主磁极包括梯形形状的轨道限定部分和从上方观察形成为梯形的磁通引导部分。 轨道限定部分形成为使得其平行于空气轴承表面(ABS)的宽度相对于其高度方向长度以10%至20%的速率增加。 考虑到由头制造过程的公差引起的变化,10〜20%的比率是形状适当可控的范围。
    • 3. 发明申请
    • Method of manufacturing a magnetic head and a magnetic head
    • 制造磁头和磁头的方法
    • US20060238918A1
    • 2006-10-26
    • US11408429
    • 2006-04-20
    • Atsushi KatoNorihiro OokawaHisashi Kimura
    • Atsushi KatoNorihiro OokawaHisashi Kimura
    • G11B5/147
    • G11B5/3163G11B5/1278G11B5/3116Y10T29/49041Y10T29/49043Y10T29/49046Y10T29/4906
    • A main magnetic pole of a recording head is formed in an inverted trapezoidal shape by ion milling but, the long milling time poses a problem of variations in the inverted trapezoidal shape and the dimensional variations in track width. In one embodiment of the invention, a recording head is formed by first forming a lower magnetic pole, a gap layer, and conductor coils, forming an upper magnetic yoke over the gap layer at a position recessed from the air bearing surface, and forming an inorganic insulative layer in the recessed portion. A back magnetic pole connected with the upper magnetic yoke is formed on the back of the lower electrode. Successively, the upper surfaces of the inorganic insulative layer and the upper magnetic yoke are planarized, on which an underlayer film such as of Rh is formed. A magnetic layer is formed by stacking a plurality of thin magnetic films by sputtering over the underlayer film from the air bearing surface as far as the position overlapping the upper magnetic yoke. Successively, ion milling is applied to form a main magnetic pole of an inverted trapezoidal shape having a taper on the lateral surface as viewed from the air bearing surface.
    • 记录头的主磁极通过离子铣削形成倒梯形形状,但是长铣削时间带来了倒梯形形状的变化和轨道宽度的尺寸变化的问题。 在本发明的一个实施例中,通过首先形成下磁极,间隙层和导体线圈来形成记录头,在距空气轴承表面凹陷的位置上在间隙层上形成上磁轭,并形成 无机绝缘层。 与上磁轭连接的后磁极形成在下电极的背面。 接着,无机绝缘层和上磁轭的上表面被平坦化,在其上形成诸如Rh的下层膜。 通过从空气轴承表面溅射下层膜而形成多个薄磁性膜,只要与上磁轭重叠的位置即可形成磁性层。 接着,从空气轴承表面观察,施加离子铣削以形成具有在侧面上的锥形的倒梯形形状的主磁极。
    • 4. 发明授权
    • Method of manufacturing a magnetic head
    • 制造磁头的方法
    • US07716812B2
    • 2010-05-18
    • US11408429
    • 2006-04-20
    • Atsushi KatoNorihiro OokawaHisashi Kimura
    • Atsushi KatoNorihiro OokawaHisashi Kimura
    • G11B5/187
    • G11B5/3163G11B5/1278G11B5/3116Y10T29/49041Y10T29/49043Y10T29/49046Y10T29/4906
    • A main magnetic pole of a recording head is formed in an inverted trapezoidal shape by ion milling but, the long milling time poses a problem of variations in the inverted trapezoidal shape and the dimensional variations in track width. In one embodiment of the invention, a recording head is formed by first forming a lower magnetic pole, a gap layer, and conductor coils, forming an upper magnetic yoke over the gap layer at a position recessed from the air bearing surface, and forming an inorganic insulative layer in the recessed portion. A back magnetic pole connected with the upper magnetic yoke is formed on the back of the lower electrode. Successively, the upper surfaces of the inorganic insulative layer and the upper magnetic yoke are planarized, on which an underlayer film such as of Rh is formed. A magnetic layer is formed by stacking a plurality of thin magnetic films by sputtering over the underlayer film from the air bearing surface as far as the position overlapping the upper magnetic yoke. Successively, ion milling is applied to form a main magnetic pole of an inverted trapezoidal shape having a taper on the lateral surface as viewed from the air bearing surface.
    • 记录头的主磁极通过离子铣削形成倒梯形形状,但是长铣削时间带来了倒梯形形状的变化和轨道宽度的尺寸变化的问题。 在本发明的一个实施例中,通过首先形成下磁极,间隙层和导体线圈形成记录头,在空隙支承表面凹陷的位置上在间隙层上形成上磁轭,并形成 无机绝缘层。 与上磁轭连接的后磁极形成在下电极的背面。 接着,无机绝缘层和上磁轭的上表面被平坦化,在其上形成诸如Rh的下层膜。 通过从空气轴承表面溅射下层膜而形成多个薄磁性膜,只要与上磁轭重叠的位置即可形成磁性层。 接着,从空气轴承表面观察,施加离子铣削以形成具有在侧面上的锥形的倒梯形形状的主磁极。
    • 6. 发明授权
    • Projector and controlling method of the same
    • 投影机及其控制方法相同
    • US09584780B2
    • 2017-02-28
    • US14655695
    • 2012-12-27
    • Atsushi Kato
    • Atsushi Kato
    • G03B35/26H04N13/04H04N9/31G03B21/20G03B33/12G03B35/16G02B26/08G02B27/10G02B27/22G02B27/26G02B27/09
    • H04N9/3164G02B26/0883G02B27/0927G02B27/0994G02B27/1026G02B27/2264G02B27/26G03B21/2066G03B33/12G03B35/16G03B35/26H04N9/3108H04N9/3111H04N9/312H04N9/3152H04N9/3182H04N13/324H04N13/334H04N13/346H04N13/363H04N13/365
    • The projector comprises: at least one light source; a light separation unit separating light emitted from the light source into a first and second lights in different wavelength bands; a TIR prism through which the first and second lights pass; an optical modulating element irradiated with and modulating the first and second lights to emit the modulated first and second lights toward the TIR prism; a projection lens expanding and projecting the light which is modulated by the optical modulating element and passes the TIR prism; a rotating prism which is rotatably arranged in the light path between the light separation unit and the TIR prism and emits, from different positions in accordance with rotation, the first and second lights emitted from the light separation unit; and a control unit which, when the image signals representing a first and second images are supplied, causes the optical modulating element to perform modulation according to the image signal of the first image with regard to the area irradiated by the first light and to perform modulation according to the image signal of the second image with regard to the area irradiated by the second light.
    • 该投影仪包括:至少一个光源; 光分离单元,将从所述光源发射的光分离成不同波长带的第一和第二光; 第一和第二个光通过的TIR棱镜; 照射并调制第一和第二光的光调制元件,以朝向TIR棱镜发射调制的第一和第二光; 投影透镜,使由光调制元件调制的光通过TIR棱镜, 可旋转地布置在光分离单元和TIR棱镜之间的光路中的旋转棱镜,并且从光分离单元发射的第一和第二光从旋转的不同位置发射; 以及控制单元,当提供表示第一和第二图像的图像信号时,光调制元件根据第一图像的图像信号相对于由第一光照射的面积进行调制,并且执行调制 根据第二图像的图像信号相对于由第二光照射的面积。
    • 10. 发明授权
    • Magnetic head having a thermal fly-height control (TFC) structure under a flat lower shield
    • 在平面下屏蔽下具有热飞高控制(TFC)结构的磁头
    • US08760787B2
    • 2014-06-24
    • US13310428
    • 2011-12-02
    • Takashi WagatsumaYukimasa OkadaIchiro OodakeAtsushi Kato
    • Takashi WagatsumaYukimasa OkadaIchiro OodakeAtsushi Kato
    • G11B5/02
    • G11B5/607G11B5/3133
    • In one embodiment, a method includes forming a conducting material above an insulating film, applying a mask to portions of the conducting material in a shape of a TFC structure, removing exposed portions of the conducting material to form the TFC structure, depositing an insulating film above the TFC structure, and planarizing the insulating film to form a planar upper surface of the insulating film. In another embodiment, a magnetic head includes a TFC structure positioned between insulating films and a magnetic element positioned above the TFC structure, the TFC structure configured for providing localized thermal protrusion of the magnetic head on a media facing surface thereof, wherein an upper surface of an upper of the insulating films is planar, the magnetic element includes at least one of a main magnetic pole and a read sensor, and the TFC structure is configured for providing thermal protrusion of the magnetic element.
    • 在一个实施例中,一种方法包括在绝缘膜的上方形成导电材料,以TFC结构的形式对导电材料的部分施加掩模,去除导电材料的暴露部分以形成TFC结构,沉积绝缘膜 在TFC结构之上,并且平坦化绝缘膜以形成绝缘膜的平面上表面。 在另一个实施例中,磁头包括定位在绝缘膜和位于TFC结构之上的磁性元件之间的TFC结构,该TFC结构被配置用于在其面向介质的表面上提供磁头的局部热突出,其中, 绝缘膜的上部是平面的,磁性元件包括主磁极和读取传感器中的至少一个,并且TFC结构被配置为提供磁性元件的热突起。