CN111145788A - 热辅助磁记录头及热辅助磁记录磁盘驱动器 - Google Patents

热辅助磁记录头及热辅助磁记录磁盘驱动器 Download PDF

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CN111145788A
CN111145788A CN201811303168.4A CN201811303168A CN111145788A CN 111145788 A CN111145788 A CN 111145788A CN 201811303168 A CN201811303168 A CN 201811303168A CN 111145788 A CN111145788 A CN 111145788A
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magnetic recording
assisted magnetic
laser
recording head
thermally
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藤井隆司
黄坚辉
西岛夏夫
黄林
陈世雄
齐斌
郭文荣
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SAE Magnetics HK Ltd
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SAE Magnetics HK Ltd
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Priority to CN201811303168.4A priority Critical patent/CN111145788A/zh
Priority to US16/231,628 priority patent/US10811042B2/en
Publication of CN111145788A publication Critical patent/CN111145788A/zh
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
    • G11B5/4866—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives the arm comprising an optical waveguide, e.g. for thermally-assisted recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers
    • G11B5/3133—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers
    • G11B5/3133—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure
    • G11B5/314—Disposition of layers including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure where the layers are extra layers normally not provided in the transducing structure, e.g. optical layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G11B5/6088—Optical waveguide in or on flying head
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/0021—Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal

Abstract

本发明涉及一种热辅助磁记录头及热辅助磁记录磁盘驱动器，该热辅助磁记录头包括滑块主体、激光基板、激光器和磁头，所述激光基板设置在滑块主体上，所述激光器设置在所述激光基板上，所述磁头设置在所述滑块主体的前端，所述磁头包括正对所述激光器的光波导路，所述光波导路的入光面与激光入射到所述光波导路的入射方向的夹角小于90度；该磁盘驱动器包括多个磁盘和磁头悬架，所述磁头悬架的前端设置有如以上所述的热辅助磁记录头。在本发明的热辅助磁记录头中，由于光波导路的入光面与入射方向的夹角小于90度，入光面的反射光线不会沿入射方向返回激光器，可以改善激光发射不稳定和抑制跳模。

Description

热辅助磁记录头及热辅助磁记录磁盘驱动器
技术领域
本发明涉及磁盘驱动器技术，更具体地说，涉及一种热辅助磁记录头及热辅助磁记录磁盘驱动器。
背景技术
为了提高磁记录密度，以往的方法是尽量减小颗粒尺寸，但随着存储密度不断提升，人们发现晶粒体积的减小受到超顺磁效应的限制。当记录点的尺寸减小时，磁有序的弛豫时间将成指数减小；当记录点的测量温度增加时，磁有序的弛豫时间也将成指数减小。因此记录点体积的减小和温度的上升都将导致记录点的磁性不稳定。
为了突破因超顺磁效应而导致的磁记录密度极限，热辅助磁记录TAMR(ThermallyAssisted Magnetic Recording,也称为Heat Assisted Magnetic Recording，HAMR)技术得到了广泛关注。该技术的目的是为有效应对超高密度存储条件下磁头微场强写入的困难性，它是通过在磁记录过程中使用激光加热来降低介质的矫顽力。
热辅助磁记录磁盘驱动器包括多个磁盘、驱动多个磁盘旋转的主轴电机，以及磁头悬臂组合(Head Stack Assembly,HSA)，磁头悬臂组合包括设置在悬臂的前端的热辅助磁记录头。参看图1和2，现有的热辅助磁记录头包括滑块主体1，以及设置在滑块主体1上的激光基板2以及设置在激光基板2上的激光器3，滑块主体1的前端设置有磁头4，磁头4包括光波导路40，光波导路40的入光面41正对激光器3，入光面41是平面，即入光面41与激光器3发出的激光的入射方向垂直，这会使得激光器3发出的激光有一部分被沿原路反射回去，导致激光器3的激光发射不稳定和跳模，这些不期望的影响，会导致热辅助磁记录头的错误率大增，使高密度记录的目的难以实现。
发明内容
一方面，本发明的目的在于提供一种能够改善激光发射不稳定和抑制跳模的热辅助磁记录头，包括滑块主体、激光基板、激光器和磁头，所述激光基板设置在所述滑块主体上，所述激光器设置在所述激光基板上，所述磁头设置在所述滑块主体的前端，所述磁头包括正对所述激光器的光波导路，所述光波导路的入光面与激光入射到所述光波导路的入射方向的夹角小于90度。
根据本发明的热辅助磁记录头的一实施例，所述入光面与所述入射方向的夹角为45～87度。
根据本发明的热辅助磁记录头的一实施例，所述入光面与所述入射方向的夹角为82度。
根据本发明的热辅助磁记录头的一实施例，所述入光面通过离子束蚀刻的方式形成。
根据本发明的热辅助磁记录头的一实施例，所述入光面通过机械研磨的方式形成。
根据本发明的热辅助磁记录头的一实施例，所述入光面与所述光波导路的包层的端面处于同一平面上。
根据本发明的热辅助磁记录头的一实施例，所述入光面的法线方向相对于所述入射方向向前、后、左或右倾斜。
另一方面，本发明还提供了一种热辅助磁记录磁盘驱动器，包括多个磁盘和磁头悬架，所述磁头悬架的前端设置有如以上所述的热辅助磁记录头。
实施本发明的热辅助磁记录头，具有以下有益效果：在本发明的热辅助磁记录头中，由于光波导路的入光面与入射方向的夹角小于90度，入光面的反射光线不会沿入射方向返回激光器，可以改善激光发射不稳定和抑制跳模。
附图说明
下面将结合附图及实施例对本发明作进一步说明，附图中：
图1是现有技术的热辅助磁记录头的示意图；
图2是现有技术的热辅助磁记录头的光波导路的入光面的示意图；
图3是根据本发明的热辅助磁记录头的第一实施例的示意图；
图4是根据本发明的热辅助磁记录头的第一实施例的光波导路的入光面的示意图；
图5是根据本发明的热辅助磁记录头的第一实施例的光波导路的入光面的形成过程的示意图；
图6是根据本发明的热辅助磁记录头的第二实施例的示意图；
图7是根据本发明的热辅助磁记录头的第三实施例的示意图；
图8是根据本发明的热辅助磁记录头的第四实施例的示意图；
图9是根据本发明的热辅助磁记录头的第五实施例的示意图。
具体实施方式
为了对本发明的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本发明的具体实施方式。
下面详细描述本发明的热辅助磁记录头及热辅助磁记录磁盘驱动器的实施例，这些实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。
在本发明的热辅助磁记录头及热辅助磁记录磁盘驱动器的描述中，需要理解的是，术语“前”、“后”、“上”、“下”、“上端”、“下端”、“上部”、“下部”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性。
如图3和图4所示，为本发明的热辅助磁记录头第一实施例。在该实施例中，热辅助磁记录头包括滑块主体100、激光基板200、激光器300和磁头400。其中，激光基板200设置在滑块主体100上，激光器300设置在激光基板200上，激光器300为半导体激光器，用于产生激光，磁头400设置在滑块主体100的前端，磁头400包括正对激光器300的光波导路410，光波导路410的入光面411与激光入射到光波导路410的入射方向310的夹角α小于90度。由于入光面411与激光的入射方向不垂直，即使有一部分的激光被反射，被反射的激光也不会沿入射路线返回到激光器，避免了由于激光沿入射路线原路返回至激光器造成的激光发射不稳定和跳模的问题。入光面411与入射方向310的夹角α可以为45～87度，优选为82度。
参看图5，光波导路410的入光面411可以通过离子束蚀刻的方式形成，具体是先在光波导路410的包层的端面设置光刻胶421，然后进行离子束蚀刻，经离子束蚀刻后形成倾斜的入光面411。当然，光波导路410的入光面411也可以采用机械研磨的方式形成，并不局限于离子束蚀刻的方式。
在图3所示的实施例中，光波导路410的入光面411的法线412相对于入射方向310向前倾斜。
在图6所示的实施例中，光波导路410的入光面411的法线相对于入射方向310向左倾斜。
在图7所示的实施例中，光波导路410的入光面411的法线相对于入射方向310向后倾斜。
在图8所示的实施例中，光波导路410的入光面411的法线相对于入射方向310向右倾斜。
在图9所示的实施例中。光波导路410的入光面411与光波导路410的包层的端面431处于同一平面上。
本发明还提供了一种热辅助磁记录磁盘驱动器，包括多个磁盘和磁头悬架，磁头悬架的前端设置有如以上所述的热辅助磁记录头。
上面结合附图对本发明的实施例进行了描述，但是本发明并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本发明的启示下，在不脱离本发明宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些落入于本发明的保护之内。

Claims (8)

1.一种热辅助磁记录头，包括滑块主体、激光基板、激光器和磁头，所述激光基板设置在所述滑块主体上，所述激光器设置在所述激光基板上，所述磁头设置在所述滑块主体的前端，所述磁头包括正对所述激光器的光波导路，其特征在于，所述光波导路的入光面与激光入射到所述光波导路的入射方向的夹角小于90度。
2.根据权利要求1所述的热辅助磁记录头，其特征在于，所述入光面与所述入射方向的夹角为45～87度。
3.根据权利要求2所述的热辅助磁记录头，其特征在于，所述入光面与所述入射方向的夹角为82度。
4.根据权利要求1所述的热辅助磁记录头，其特征在于，所述入光面通过离子束蚀刻的方式形成。
5.根据权利要求1所述的热辅助磁记录头，其特征在于，所述入光面通过机械研磨的方式形成。
6.根据权利要求1所述的热辅助磁记录头，其特征在于，所述入光面与所述光波导路的包层的端面处于同一平面上。
7.根据权利要求1所述的热辅助磁记录头，其特征在于，所述入光面的法线方向相对于所述入射方向向前、后、左或右倾斜。
8.一种热辅助磁记录磁盘驱动器，包括多个磁盘和磁头悬架，其特征在于，所述磁头悬架的前端设置有如权利要求1至7任一项所述的热辅助磁记录头。
CN201811303168.4A 2018-11-02 2018-11-02 热辅助磁记录头及热辅助磁记录磁盘驱动器 Pending CN111145788A (zh)

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US16/231,628 US10811042B2 (en) 2018-11-02 2018-12-24 Disk drive thermally assisted magnetic recording head having a slider and a tilted light incident surface

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