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1. 发明授权

US06185051B2 High numerical aperture optical focusing device for use in data storage systems 有权
标题翻译：用于数据存储系统的高数值孔径光学聚焦装置
公开(公告)号：US06185051B2
公开(公告)日：2001-02-06
申请号：US09338785
申请日：1999-06-23
申请人： Hong Chen , Chuan He , Charles C. K. Cheng , Joseph J. Miceli, Jr.
发明人： Hong Chen , Chuan He , Charles C. K. Cheng , Joseph J. Miceli, Jr.
IPC分类号： G02B1318
CPC分类号： B82Y10/00 , G11B7/122 , G11B7/1374 , G11B7/1387 , G11B11/10534 , G11B11/10543 , G11B11/10554 , G11B11/1058 , G11B2007/13725
摘要： A near-field optical or MO data storage system uses an optical focusing device for focusing an incident optical beam to a small size focal spot. The optical focusing device includes an optically transmissive body which is defined by a generally flat incident surface, a flat, bottom surface disposed opposite and parallel to the incident surface, and a reflective side coated with a reflective layer for reflecting the optical beam through the body toward the bottom surface. The bottom surface defines a focal plane on which the focal spot is formed, for generating a localized evanescent field. The focal spot is located along a central axis P, in very close proximity to the data storage disk, such that the localized evanescent field interacts with the disk, for enabling data to be transduced to and from the disk by effecting near field coupling. An electro-magnetic coil or coil assembly, can optionally be formed on the bottom surface, co-axially with the focal spot, for generating a desired write magnetic field. The reflective side of the optical focusing device preferably has a parabola shaped curvature, but other shapes can alternatively be selected. For example, the side curvature can have a tilted parabola shape.
摘要翻译：近场光学或MO数据存储系统使用光聚焦装置将入射光束聚焦到小尺寸焦点。该光学聚焦装置包括光学透射体，其由大致平坦的入射表面，与入射表面相对并平行设置的平坦的底表面限定，反射面涂覆有反射层，用于将光束反射通过本体朝向底面。底表面限定焦平面，焦平面形成在其上，用于产生局部渐逝场。焦点沿着中心轴P位于数据存储盘非常接近处，使得局部的消逝场与磁盘相互作用，以通过进行近场耦合使数据能够被传送到磁盘。电磁线圈或线圈组件可以可选地形成在底表面上，与焦斑同轴地形成，以产生所需的写入磁场。光学聚焦装置的反射侧优选地具有抛物线形曲率，但是也可以选择其它形状。例如，侧曲率可以具有倾斜的抛物线形状。

2. 发明授权

US6130779A Near field magneto-optical head made using wafer processing techniques 失效
标题翻译：使用晶片处理技术制造的近场磁光头
公开(公告)号：US6130779A
公开(公告)日：2000-10-10
申请号：US111098
申请日：1998-07-06
申请人： Carl J. Carlson , Joseph Miceli, Jr. , Hong Chen , Chuan He , Charles C-K Cheng , Ross W Stovall
发明人： Carl J. Carlson , Joseph Miceli, Jr. , Hong Chen , Chuan He , Charles C-K Cheng , Ross W Stovall
IPC分类号： G02B5/18 , G11B7/135 , G11B7/22 , G11B11/105 , G11B7/00 , G11B5/27
CPC分类号： G11B11/10554 , B82Y10/00 , G02B5/1876 , G02B5/1885 , G11B11/10532 , G11B7/1353 , G11B11/1058 , G11B7/22
摘要： The method of making and self-aligning a magneto-optical head at a wafer level is as follows: A flat optical substrate is molded or heat pressed in batches as a wafer level to form the desired lens shapes. Coil cavities or depressions are simultaneously formed with the lens to accommodate the coil assembly. Conductive plugs are formed in proximity to the cutting lines, for wire bonding attachment to the coil. The plugs are filled with a conductive material such as copper. The plugs do not extend through the entire depth of the optical wafer, thus further facilitating the mass production of the integrated heads. The slider body wafer is formed from silicon or other appropriate material. The slider body wafer and the lens/coil wafer are bonded. Coils and pedestals are formed on the lens / coil plate using thin-film processing techniques. Reflective surfaces are deposited on the bottom surface of the substrate, opposite the lens. The mirror material around the pedestal areas and plugs is masked and removed. An alumina layer is then deposited to define the air bearing surface and the pedestal. Yokes are then formed by means of lithography and plating in the base and sides of the depressions to assume a desired shape. A series of alternating insulating layers and conductive coil layers is formed. A protective layer seals the coil assembly, and is lapped to correct the lens thickness and to provide proper focal plane.
摘要翻译：在晶片级别制造和自动对准磁光头的方法如下：平板光学基板被成型或成批地热压成晶片级以形成所需的透镜形状。线圈腔或凹陷部分与透镜同时形成以容纳线圈组件。导电插塞形成在切割线附近，用于与线圈的引线接合。塞子填充有诸如铜的导电材料。插头不延伸穿过光学晶片的整个深度，从而进一步促进了集成头的批量生产。滑块体晶片由硅或其它合适的材料形成。滑块体晶片和透镜/线圈晶片接合。使用薄膜加工技术在透镜/线圈板上形成线圈和基座。反射表面沉积在基底的与透镜相对的底表面上。底座区域和插头周围的镜子材料被遮蔽并移除。然后沉积氧化铝层以限定空气轴承表面和基座。然后通过在凹部的基部和侧面中的光刻和电镀形成轭以呈现期望的形状。形成一系列交替绝缘层和导电线圈层。保护层密封线圈组件，并且被研磨以校正透镜厚度并提供适当的焦平面。

3. 发明授权

US4224509A Holographic scanning system 失效
标题翻译：全息扫描系统
公开(公告)号：US4224509A
公开(公告)日：1980-09-23
申请号：US953155
申请日：1978-10-19
申请人： Charles C. K. Cheng
发明人： Charles C. K. Cheng
IPC分类号： G02B5/32 , G02B26/10 , G06K7/10 , G02B27/17
CPC分类号： G06K7/10871 , G02B26/106
摘要： A holographic scanning system for scanning a bar code indicia is disclosed in which the light beam of a laser is split into two segments, each directed through a plurality of holograms mounted on a single rotating disk for generating a scanning pattern comprising a plurality of intersecting lines on a target area through which passes a label or object bearing a bar code indicia. The light reflected from the bar code indicia is picked up by an optical detector for use in reading the bar code. A second embodiment includes a rotating disk having mounted thereon two holograms each offset to the other which generates a semicircular scan pattern used in generating an X scan pattern on the target area.
摘要翻译：公开了一种用于扫描条形码标记的全息扫描系统，其中激光的光束被分成两个部分，每个部分被引导通过安装在单个旋转盘上的多个全息图，以产生包括多个相交线的扫描图案在通过标签或物体的目标区域上带有条形码标记。从条形码标记反射的光被光学检测器拾取，用于读取条形码。第二实施例包括其上安装有两个全息图的旋转盘，每个全息图偏移到另一个，其产生用于在目标区域上生成X扫描图案的半圆扫描图案。

4. 发明授权

US5986978A Read/write head and method for magnetic reading and magneto-optical writing on a data storage medium 失效
标题翻译：在数据存储介质上进行磁读取和磁光写入的读/写头和方法
公开(公告)号：US5986978A
公开(公告)日：1999-11-16
申请号：US5914
申请日：1998-01-12
申请人： Robert E. Rottmayer , Charles C- K Cheng , Xizeng Shi , Lijun Tong , Hua-Ching Tong
发明人： Robert E. Rottmayer , Charles C- K Cheng , Xizeng Shi , Lijun Tong , Hua-Ching Tong
IPC分类号： G11B5/00 , G11B5/012 , G11B5/39 , G11B5/48 , G11B11/00 , G11B5/127
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/00 , G11B5/012 , G11B5/3903 , G11B5/3967 , G11B5/4806 , G11B5/4886 , G11B2005/001 , G11B2005/0021 , G11B2005/3996
摘要： A read/write head is structurally significantly less complicated than optical reading devices, requires minimal or no optical alignment, capable of writing at higher track densities, and has better control of the data and servo tracks than conventional magnetic heads. The head is also capable of using an available heat source and a relatively weak magnetic field, such as 300 Oersteds, to write data on a data storage medium. The combination of a magnetic read sensor with a near field magneto-optical (MO) write element creates a hybrid read/write head capable of high density recording with a high signal to noise ratio. The integration of the MO write element can be accomplished by various alternative or complementary methods. One method is to mount a heat source, such as a laser or light source on a slider with minimal or no additional optical components. Another method is to form an optical channel (or waveguide) in the slider and/or in the magnetic write element for directing a laser beam onto a target spot on, or within the data storage medium. Since magneto-optical recording requires a magnetic field of a few hundred Oersteds, the head utilizes write poles of magnetic materials operated at a low magnetic field. This is a significant simplification over existing magnetic and MO read/write heads, since the track width of the data storage medium is defined by the laser beam width and not by the pole width. In a preferred embodiment, a giant magneto-resistive (GMR) element is selected as a read element.
摘要翻译：读/写头在结构上比光学读取装置复杂得多，需要最小或不需要光学对准，能够以更高的轨道密度写入，并且比传统磁头更好地控制数据和伺服磁道。头部还能够使用可用的热源和相对较弱的磁场（例如300奥斯特）来在数据存储介质上写入数据。磁读取传感器与近场磁光（MO）写元件的组合产生能够以高信噪比进行高密度记录的混合读/写头。 MO写入元件的集成可以通过各种替代或补充方法来实现。一种方法是将热源（例如激光或光源）安装在具有最少或没有额外的光学部件的滑块上。另一种方法是在滑块和/或磁写入元件中形成光通道（或波导），用于将激光束引导到数据存储介质上或数据存储介质内的目标点上。由于磁光记录需要几百奥斯特的磁场，所以磁头利用在低磁场下操作的磁性材料的写磁极。这是对现有磁盘和MO读/写磁头的显着简化，因为数据存储介质的磁道宽度由激光束宽度而不是由磁极宽度限定。在优选实施例中，选择巨磁电阻（GMR）元件作为读取元件。

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