公开(公告)号：US20060002011A1

公开(公告)日：2006-01-05

申请号：US11167126

申请日：2005-06-28

申请人： Takeyoshi Yamamoto ,  Yasunori Tokuno ,  Hiroaki Saito

发明人： Takeyoshi Yamamoto ,  Yasunori Tokuno ,  Hiroaki Saito

IPC分类号： G11B17/02 ,  G11B33/14 ,  F16C32/06

CPC分类号： G11B33/121 ,  F16C17/107 ,  F16C33/1015 ,  F16C2370/12 ,  G11B19/2018 ,  G11B25/043

摘要： A hard disk drive device is provided, which is designed small, thin, and at low-cost. The hard disk drive device includes a case with an upright shaft, and a cylindrical hub coupled to the shaft. One end of the hub is closed by a thrust plate so that the hub has a bottomed cylindrical shape, and a hard disk is fixedly mounted on an outer peripheral part of the hub. An oil is filled in a clearance between an inner surface of the hub and an outer surface of the shaft, whereby a hydrodynamic radial bearing is formed between the inner periphery of the hub and the outer periphery of the shaft, and a hydrodynamic thrust bearing is formed between the top face of the shaft and the thrust plate. Between an outer peripheral part at the base end of the shaft and an inner peripheral part at the open end of the hub is formed a seal part in which a larger clearance is formed between the shaft and the hub than a clearance in the hydrodynamic radial bearing and in which the oil surface is positioned. An oil surface adjusting hole and a plug for sealing the hole are provided in the case opposite the seal part. A motor for rotating the hub is disposed between the outer peripheral part at the open end of the hub and the case.

摘要翻译： 提供了一种硬盘驱动器件，其设计小巧，薄型，低成本。 硬盘驱动装置包括具有直立轴的壳体和联接到轴的圆柱形毂。 轮毂的一端由止推板封闭，使得轮毂具有有底圆筒形状，并且硬盘固定地安装在轮毂的外周部分上。 油被填充在毂的内表面和轴的外表面之间的间隙中，由此在轮毂的内周和轴的外周之间形成流体动力学径向轴承，并且流体动力推力轴承是 形成在轴的顶面和止推板之间。 在轴的基端部的外周部和轮毂的开口端的内周部之间形成有密封部，在该密封部中，在轴和轮毂之间形成比在流体动力学径向轴承中的间隙更大的间隙 并且其中油表面被定位。 在与密封部相对的壳体中设置油面调整孔和密封孔的塞子。 用于旋转毂的电动机设置在轮毂的开口端的外周部与壳体之间。

公开(公告)号：US07365940B2

公开(公告)日：2008-04-29

申请号：US11167126

申请日：2005-06-28

申请人： Takeyoshi Yamamoto ,  Yasunori Tokuno ,  Hiroaki Saito

发明人： Takeyoshi Yamamoto ,  Yasunori Tokuno ,  Hiroaki Saito

IPC分类号： G11B17/02 ,  F16C32/06 ,  H02K5/16 ,  H02K7/08

CPC分类号： G11B33/121 ,  F16C17/107 ,  F16C33/1015 ,  F16C2370/12 ,  G11B19/2018 ,  G11B25/043

摘要： A hydrodynamic bearing for a hard disk drive device is disclosed. An oil is filled in a clearance between an inner surface of the hub and an outer surface of the shaft, whereby a hydrodynamic radial bearing is formed between the inner periphery of the hub and the outer periphery of the shaft, and a hydrodynamic thrust bearing is formed between the top face of the shaft and the thrust plate. Between an outer peripheral part at the base end of the shaft and an inner peripheral part at the open end of the hub is formed a seal part in which a larger clearance is formed between the shaft and the hub than a clearance in the hydrodynamic radial bearing and in which the oil surface is positioned. An oil surface adjusting hole and a plug for sealing the hole are provided in the case opposite the seal part.

摘要翻译： 公开了一种用于硬盘驱动装置的流体动力轴承。 油被填充在毂的内表面和轴的外表面之间的间隙中，由此在轮毂的内周和轴的外周之间形成流体动力学径向轴承，并且流体动力推力轴承是 形成在轴的顶面和止推板之间。 在轴的基端部的外周部和轮毂的开口端的内周部之间形成有密封部，在该密封部中，在轴和轮毂之间形成比在流体动力学径向轴承中的间隙更大的间隙 并且其中油表面被定位。 在与密封部相对的壳体中设置油面调整孔和密封孔的塞子。

公开(公告)号：US07622837B2

公开(公告)日：2009-11-24

申请号：US11407060

申请日：2006-04-20

申请人： Hiroaki Saito ,  Takeyoshi Yamamoto ,  Takao Yoshitsugu

发明人： Hiroaki Saito ,  Takeyoshi Yamamoto ,  Takao Yoshitsugu

IPC分类号： H02K5/16

CPC分类号： F16C33/107 ,  F16C17/107 ,  H02K5/1675 ,  H02K7/085

摘要： A set of radial dynamic pressure generating grooves constitute a radial bearing, and an entire width (L) of the radial dynamic pressure generating groove is reduced. A set of thrust dynamic pressure generating grooves constituting a thrust bearing are formed so that an area where a maximal thrust dynamic pressure is generated (diameter) is increased, and a bearing angle stiffness of the thrust bearing is increased. The thrust bearing having the high bearing angle stiffness shares a moment load applied to a shaft to thereby compensate for a bearing angle stiffness of the radial bearing whose bearing stiffness is small because an entire width of the radial bearing is small. Thus, a thin-shaped hydrodynamic bearing capable of withstanding a large moment load is obtained.

摘要翻译： 一组径向动压产生槽构成径向轴承，并且径向动压产生槽的整个宽度（L）减小。 形成构成推力轴承的一组推力动压生成槽，使得产生最大推力动压（直径）的区域增加，并且推力轴承的轴承角刚度增加。 具有高轴承角刚度的推力轴承共享施加到轴的力矩载荷，从而补偿径向轴承的轴承刚度，其轴承刚度较小，因为径向轴承的整个宽度较小。 因此，获得能够承受大的力矩载荷的薄型流体动力轴承。

公开(公告)号：US20060255675A1

公开(公告)日：2006-11-16

申请号：US11407060

申请日：2006-04-20

申请人： Hiroaki Saito ,  Takeyoshi Yamamoto ,  Takao Yoshitsugu

发明人： Hiroaki Saito ,  Takeyoshi Yamamoto ,  Takao Yoshitsugu

IPC分类号： H02K5/16 ,  H02K7/08

CPC分类号： F16C33/107 ,  F16C17/107 ,  H02K5/1675 ,  H02K7/085

摘要： A set of radial dynamic pressure generating grooves constitute a radial bearing, and an entire width (L) of the radial dynamic pressure generating groove is reduced. A set of thrust dynamic pressure generating grooves constituting a thrust bearing are formed so that an area where a maximal thrust dynamic pressure is generated (diameter) is increased, and a bearing angle stiffness of the thrust bearing is increased. The thrust bearing having the high bearing angle stiffness shares a moment load applied to a shaft to thereby compensate for a bearing angle stiffness of the radial bearing whose bearing stiffness is small because an entire width of the radial bearing is small. Thus, a thin-shaped hydrodynamic bearing capable of withstanding a large moment load is obtained.

公开(公告)号：US07589934B2

公开(公告)日：2009-09-15

申请号：US12188545

申请日：2008-08-08

申请人： Takafumi Asada ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

发明人： Takafumi Asada ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

IPC分类号： G11B19/20

CPC分类号： F16C17/107 ,  F16C33/103 ,  F16C33/107 ,  F16C2370/12

摘要： In a hydrodynamic bearing device in which a radial bearing face having a dynamic pressure generating groove on a shaft or an inner periphery of a sleeve is provided and a clearance between the shaft and the sleeve is filled with lubricant, an annular depression is provided on one end face of the sleeve adjacent to a rotor hub and a cover plate for covering the depression is attached to the sleeve so as to define a reservoir for the lubricant or air for the purpose of preventing such a risk that absence of an oil film occurs in clearances of a bearing of the hydrodynamic bearing device due to outflow of oil upon forcing of the oil by air received into the bearing. A step portion is provided on the other end face of the sleeve such that the step portion and the reservoir are communicated with each other by a communication hole. During operation of the hydrodynamic bearing device, air in the hydrodynamic bearing device reaches the reservoir via the communication hole so as to be discharged from the reservoir.

摘要翻译： 在一种流体动力轴承装置中，其中设置有在轴上的动压产生槽或套筒的内周上的径向支承面，并且轴与套筒之间的间隙充满润滑剂，环形凹部设置在一个 与转子轮毂相邻的套筒的端面和用于覆盖凹部的盖板附接到套筒上，以便限定用于润滑剂或空气的储存器，以便防止在油膜中不存在油膜的风险 由于在接收到轴承中的空气迫使油被油流出时，流体动力轴承装置的轴承的间隙。 台阶部设置在套筒的另一端面上，使得台阶部分和储存器通过连通孔相互连通。 在流体动力轴承装置的操作期间，流体动力轴承装置中的空气经由连通孔到达储存器，以便从储存器排出。

公开(公告)号：US20090154852A1

公开(公告)日：2009-06-18

申请号：US12333903

申请日：2008-12-12

申请人： Takafumi ASADA ,  Hiroaki Saito ,  Daisuke Ito

发明人： Takafumi ASADA ,  Hiroaki Saito ,  Daisuke Ito

IPC分类号： F16C32/06

CPC分类号： G11B19/2036 ,  F16C17/045 ,  F16C33/103 ,  F16C33/107 ,  F16C2370/12

摘要： The hydrodynamic bearing device comprises a sleeve 1, a shaft 2, a thrust bearing portion, and a lubricating fluid 5. The sleeve 1 has a bearing hole 1C. The shaft 2 is inserted into the bearing hole 1C in a state of being able to rotate relative to the sleeve 1. The thrust bearing portion has a hydrodynamic groove for generating pressure in the axial direction. The lubricating fluid 5 is held in a gap formed by the thrust bearing portion. The hydrodynamic bearing device is further constituted so that the value of a wear amount function F6 falls into a specific range. With the hydrodynamic bearing device, the required bearing performance can be satisfied, and the thrust bearing portion has a longer intermittent service life.

摘要翻译： 流体动力轴承装置包括套筒1，轴2，推力轴承部分和润滑流体5.套筒1具有轴承孔1C。 轴2在能够相对于套筒1旋转的状态下插入到轴承孔1C中。推力轴承部分具有用于在轴向方向产生压力的流体动力槽。 润滑流体5保持在由止推轴承部形成的间隙中。 流体动力轴承装置进一步构成为使磨损量函数F6的值落入特定范围。 使用流体动力轴承装置，可以满足所需的轴承性能，推力轴承部分具有较长的间歇使用寿命。

公开(公告)号：US07492548B2

公开(公告)日：2009-02-17

申请号：US10554473

申请日：2004-04-13

申请人： Takafumi Asada ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

发明人： Takafumi Asada ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

IPC分类号： G11B17/02

CPC分类号： F16C17/107 ,  F16C33/103 ,  F16C33/107 ,  F16C2370/12

摘要： In a hydrodynamic bearing device in which a radial bearing face having a dynamic pressure generating groove on a shaft or an inner periphery of a sleeve is provided and a clearance between the shaft and the sleeve is filled with lubricant, an annular depression is provided on one end face of the sleeve adjacent to a rotor hub and a cover plate for covering the depression is attached to the sleeve so as to define a reservoir for the lubricant or air for the purpose of preventing such a risk that absence of an oil film occurs in clearances of a bearing of the hydrodynamic bearing device due to outflow of oil upon forcing of the oil by air received into the bearing. A step portion is provided on the other end face of the sleeve such that the step portion and the reservoir are communicated with each other by a communication hole. During operation of the hydrodynamic bearing device, air in the hydrodynamic bearing device reaches the reservoir via the communication hole so as to be discharged from the reservoir.

公开(公告)号：US20080080797A1

公开(公告)日：2008-04-03

申请号：US11905354

申请日：2007-09-28

申请人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Ito

发明人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Ito

IPC分类号： F16C32/06 ,  G11B5/52

CPC分类号： F16C17/107 ,  F16C33/107 ,  F16C33/1085 ,  F16C33/745 ,  F16C2370/12 ,  G11B19/2036

摘要： PROBLEM: To prevent oil film breakage in bearings without expelling of air internally accumulated at the bearing. METHOD FOR SOLVING THE PROBLEM: A hydrodynamic bearing type rotary device in which radial hydrodynamic grooves and thrust hydrodynamic grooves form communicating channels; have communicating holes designed to communicate the groove end of the radial hydrodynamic groove on the side opposite the thrust hydrodynamic grooves with the groove end of the thrust hydrodynamic groove on the side opposite the radial hydrodynamic grooves; have a circulation route composed by the communicating hole, the radial hydrodynamic groove, and the thrust hydrodynamic groove; and circulate lubricating oil by means of a pump force of the hydrodynamic groove. It is possible to attain a long-lasting hydrodynamic bearing-type rotary device in which lubricating oil is circulated by pressure applied by a hydrodynamic groove positioned upstream to a bearing portion, ceasing the formation of low-pressure parts from the bearing portion, preventing the accumulation of air bubbles, and thereby preventing the occurrence of oil film breakage at the radial hydrodynamic groove and the thrust hydrodynamic groove.

摘要翻译： 问题：为防止轴承内部积聚的空气排出轴承油膜破损。 解决问题的方法：一种流体动力轴承型旋转装置，其中径向流体动力槽和推力流体动力槽形成连通通道; 具有连通孔，其设计成在径向流体动力槽的与推力流体动力槽相对的一侧的沟槽端部与推力流体动力槽的与径向流体动力槽相对的一侧的槽端部连通; 具有由连通孔，径向流体动力槽和推力流体动力槽组成的循环路线; 并通过流体动力槽的泵力使润滑油循环。 可以获得一种持久的流体动力轴承式旋转装置，其中润滑油通过由位于轴承部分上游的流体动力槽施加的压力循环，停止从轴承部分形成低压部件，从而防止 积聚气泡，从而防止在径向流体动力槽和推力流体动力槽处发生油膜破裂。

公开(公告)号：US20070253650A1

公开(公告)日：2007-11-01

申请号：US11785186

申请日：2007-04-16

申请人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Ito

发明人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Ito

IPC分类号： F16C32/06

CPC分类号： F16C33/107 ,  F16C17/107 ,  F16C2370/12

摘要： To prevent air from being trapped inside a bearing and causing the bearing to have oil film rupture and NRRO to deteriorate. In a hydrodynamic bearing, a first lubricant reservoir is provided in a gap between a lower surface of a hub and a sleeve, and a second lubricant reservoir is provided in a gap between an outer peripheral surface of the sleeve and an inner peripheral surface of the hub or an inner peripheral surface of a stopper member fixed to the hub. If air enters inside such a hydrodynamic bearing, the air has to be discharged. For this purpose, the relationship in widths of the radial bearing gap, the maximum gap of the first lubricant reservoir under the lower surface of the hub and the maximum gap of the second lubricant reservoir on the sleeve outer peripheral surface, or the relationship in magnitudes of capillary forces thereof is adjusted. The principle that air tends to move toward the portion having smaller capillary pressure is utilized to make it difficult for the air to be trapped inside the bearing and to smoothly discharge the air from a gas-liquid interface of the second lubricant reservoir.

摘要翻译： 为了防止空气被夹在轴承内部并导致轴承有油膜破裂和NRRO劣化。 在流体动力轴承中，第一润滑剂储存器设置在毂的下表面和套筒之间的间隙中，并且第二润滑剂储存器设置在套筒的外周表面和套筒的外周表面之间的间隙中 轮毂或固定到轮毂的止动件的内周面。 如果空气进入这种流体动力轴承内，则空气必须排出。 为此，径向轴承间隙的宽度关系，轮毂下表面下的第一润滑剂储存器的最大间隙和套筒外周表面上的第二润滑剂储存器的最大间隙，或者其关系 的毛细管力被调节。 利用空气倾向于朝向具有较小毛细管压力的部分移动的原理，使得难以将空气捕获在轴承内部并且平滑地从第二润滑剂储存器的气 - 液界面排出空气。

公开(公告)号：US20070166905A1

公开(公告)日：2007-07-19

申请号：US11709147

申请日：2007-02-22

申请人： Masamichi Yanagida ,  Hirotoshi Kubo ,  Junichiro Tojo ,  Hiroaki Saito ,  Masahito Onda

发明人： Masamichi Yanagida ,  Hirotoshi Kubo ,  Junichiro Tojo ,  Hiroaki Saito ,  Masahito Onda

IPC分类号： H01L21/8234 ,  H01L21/336

CPC分类号： H01L29/7813 ,  H01L29/1095 ,  H01L29/66734

摘要： In an embodiment of the present invention, after trenches, a gate oxide film and gate electrodes are formed, a channel layer is formed by plural high-acceleration ion implantations where acceleration voltages are different with one another. The channel layer is an impurity implanted layer on which diffusion by a heat treatment is not performed. The channel layer is allowed to have its impurity concentration substantially uniform in a depth-wise direction of the trenches, by implanting ions of the impurity at plural different times by use of a high-acceleration ion implantation system. Since a second region having almost no influence on a characteristic of the channel layer can be reduced, the channel layer having a minimum necessary depth can be obtained. The trenches are thus made shallow, and accordingly a capacitance can be reduced. Furthermore, an on resistance can be made lower by making an epitaxial layer thinner.

摘要翻译： 在本发明的实施例中，在沟槽之后，形成栅氧化膜和栅电极，通过加速电压彼此不同的多个高加速度离子注入形成沟道层。 沟道层是不进行通过热处理的扩散的杂质注入层。 通过使用高加速度离子注入系统，在多个不同时间通过注入杂质的离子，允许沟道层在沟槽的深度方向上具有基本均匀的杂质浓度。 由于可以减少对沟道层的特性几乎没有影响的第二区域，所以可以获得具有最小所需深度的沟道层。 因此，沟槽变浅，因此可以减小电容。 此外，通过使外延层更薄，可以使导通电阻更低。