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51. 发明申请

US20080304776A1 HYDRODYNAMIC BEARING DEVICE AND DISK ROTATING APPARATUS 失效
标题翻译：水力轴承装置和盘旋转装置
公开(公告)号：US20080304776A1
公开(公告)日：2008-12-11
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： F16C32/06 , 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.
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。

52. 发明申请

US20080212907A1 HYDRODYNAMIC BEARING, AND HYDRODYNAMIC BEARING-TYPE ROTARY DEVICE AND RECORDING AND REPRODUCING APPARATUS EQUIPPED WITH SAME 审中-公开
标题翻译：水动力轴承和水动力轴承类型旋转装置及其配备的记录和再生装置
公开(公告)号：US20080212907A1
公开(公告)日：2008-09-04
申请号：US12031199
申请日：2008-02-14
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： F16C33/102 , F16C17/107 , F16C33/107 , F16C2370/12
摘要： The angular stiffness of a bearing is kept high, and at the same time air inside the bearing is discharged smoothly, without accumulating, which prevents oil film separation on the bearing. With the present invention, a communicating hole is provided, the hole and a radial hydrodynamic groove constitute a circulation path for a lubricant, there is a first thrust bearing face in contact with the circulation path, there is a first hydrodynamic groove on the face, this groove is a herringbone groove with a pump-in pattern, and no low-pressure part is generated in the thrust bearing, so even if the bearing undergoes a pressure change, there is no risk that the air accumulated in a low-pressure part will expand and cause oil film separation on the bearing face. Also, the bubbles are smoothly discharged by circulation of the lubricant in the asymmetrical radial hydrodynamic groove, and there is a pressure distribution such that the pressure generated at the face during bearing rotation is sufficiently high at the outer peripheral portion of the groove pattern, and angular stiffness is high.
摘要翻译：轴承的角刚度保持较高，同时轴承内的空气平稳排出，不会积聚，防止轴承上的油膜分离。在本发明中，设置有连通孔，孔和径向流体动力槽构成润滑剂的循环路径，存在与循环路径接触的第一止推轴承面，面上存在第一流体动力槽，该凹槽是具有泵入图案的人字形槽，并且在推力轴承中不产生低压部分，因此即使轴承经受压力变化，也不存在积聚在低压部分中的空气的风险会膨胀并导致轴承面上的油膜分离。此外，气泡通过不对称径向流体动力槽中的润滑剂的循环而平滑地排出，并且存在压力分布，使得在轴承旋转期间在面处产生的压力在凹槽图案的外周部分足够高，并且角刚度高。

53. 发明申请

US20070230840A1 Hydrodynamic bearing rotary device and information apparatus 有权
标题翻译：流体动力轴承旋转装置和信息装置
公开(公告)号：US20070230840A1
公开(公告)日：2007-10-04
申请号：US11730144
申请日：2007-03-29
申请人： Takafumi Asada , Hiroaki Saito , Daisuke Itou , Keigo Kusaka , Hiroyuki Kiriyama
发明人： Takafumi Asada , Hiroaki Saito , Daisuke Itou , Keigo Kusaka , Hiroyuki Kiriyama
IPC分类号： F16C32/06
CPC分类号： F16C33/102 , F16C17/107 , F16C33/107 , F16C2370/12
摘要： A hydrodynamic bearing rotary device which can reduce rotation friction, and recording and reproducing apparatus including the same are provided. In the hydrodynamic bearing rotary device such as hard disc devices, a rotary shaft having a hub on one end is provided in a bearing of a sleeve so as to be rotatable. Thrust hydrodynamic grooves are provided on the other end surface of the rotary shaft, to form a thrust bearing with the thrust plate. A communication path is provided in the sleeve. The second gap between the hub and the sleeve end surface is used as a flow channel and is connected to the communication path. In this way, the rotation friction torque of the thrust bearing can be made sufficiently small, and internal pressure in bonded portions of the rotary shaft or the bottom plate can be suppressed. Thus, the oil can be prevented from oozing out from a small space of the bonded surfaces. Furthermore, the hydrodynamic bearing can be made thin. These effects can be combined to realize an optimal hydrodynamic bearing rotary device.
摘要翻译：提供了能够降低旋转摩擦力的流体动力轴承旋转装置，以及包括其的记录和再现装置。在诸如硬盘装置的流体动力轴承旋转装置中，一个具有一端的轮毂的旋转轴设置在套筒的轴承中以便可旋转。在旋转轴的另一端面上设置有推力液压动力槽，与止推板形成推力轴承。在套筒中提供通信路径。轮毂和套筒端面之间的第二间隙用作流动通道并连接到连通路径。以这种方式，推力轴承的旋转摩擦转矩可以变得足够小，并且可以抑制旋转轴或底板的接合部分的内部压力。因此，可以防止油从接合表面的小空间渗出。此外，流体动力轴承可以变薄。这些效果可以结合起来，实现最佳的流体动力轴承旋转装置。

54. 发明申请

US20070217721A1 Hydrodynamic bearing type rotary device 有权
标题翻译：流体动力轴承式旋转装置
公开(公告)号：US20070217721A1
公开(公告)日：2007-09-20
申请号：US11723316
申请日：2007-03-19
申请人： Takafumi Asada , Hiroaki Saito , Daisuke Itou , Hiroyuki Kiriyama , Tomoharu Takeda
发明人： Takafumi Asada , Hiroaki Saito , Daisuke Itou , Hiroyuki Kiriyama , Tomoharu Takeda
IPC分类号： F16C32/06
CPC分类号： F16C33/102 , F16C17/107 , F16C33/107 , F16C33/74 , F16C2370/12
摘要： An object of the present invention is to provide a hydrodynamic bearing type rotary device which can improve rotation performance, suppress a friction torque, and reduce power consumption of motor, and a recording and reproducing apparatus including the same. A shaft having a flange on one end and a hub on the other end is provided with a bearing of a sleeve so as to be rotatable. The sleeve includes a communication hole. A third gap between the hub and the sleeve end surface is a flow path, and is connected to the communication hole. Provided that a first gap between a thrust plate 4 and the flange 3 is S1, a second gap between the flange 3 and a lower end surface of the sleeve 1 is S2, and a third gap between the upper end surface of the sleeve 1 and the hub 7 is S3, widths of the gaps satisfy the relational expression, S3>(S1+S2).
摘要翻译：本发明的目的是提供一种能够提高旋转性能，抑制摩擦转矩并降低电动机的功率消耗的流体动力轴承型旋转装置，以及包括其的记录和再现装置。具有一端的凸缘和另一端的毂的轴设置有可旋转的套筒的轴承。套筒包括一个连通孔。轮毂和套筒端面之间的第三间隙是流动路径，并连接到连通孔。假设推力板4和凸缘3之间的第一间隙为S 1，则凸缘3与套筒1的下端面之间的第二间隙为S 2，套筒上端表面之间的第三间隙 1，集线器7为S 3，间隙的宽度满足关系式S 3>（S 1 + S 2）。

55. 发明申请

US20060274448A1 Hydrodynamic bearing device and disk rotating apparatus 有权
公开(公告)号：US20060274448A1
公开(公告)日：2006-12-07
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.

56. 发明申请

US20050266642A1 Semiconductor device and a method of fabricating the same 有权
标题翻译：半导体装置及其制造方法
公开(公告)号：US20050266642A1
公开(公告)日：2005-12-01
申请号：US11194446
申请日：2005-08-02
申请人： Hirotoshi Kubo , Masanao Kitagawa , Masahito Onda , Hiroaki Saito , Eiichiroh Kuwako
发明人： Hirotoshi Kubo , Masanao Kitagawa , Masahito Onda , Hiroaki Saito , Eiichiroh Kuwako
IPC分类号： H01L21/336 , H01L29/10 , H01L29/423 , H01L29/78
CPC分类号： H01L29/7802 , H01L29/1095 , H01L29/41766 , H01L29/4236 , H01L29/66719 , H01L29/66727 , H01L29/66734 , H01L29/7813
摘要： A power MOSFET comprises: a semiconductor substrate 21 of a first conduction type; a drain layer 22 of the first conduction type and formed on a surface layer of the substrate; a gate insulating film 25 formed in a partial region on the drain layer 22; a gate electrode 26 formed on the gate insulating film 25; an insulating film 27 formed on the gate electrode; a side wall insulator 28 formed on side walls of the gate insulating film 25, the gate electrode 26, and the insulating film 27; a recess formed on the drain layer 22 and in a region other than a region where the gate electrode 25 and the side wall insulator 28 are formed; a channel layer 23 of a second conduction type opposite to the first conduction type and formed in a range from the region where the recess is formed to a vicinity of the region where the gate electrode 26 is formed; a source region layer 24 of the one conduction type and formed on the channel layer 23 outside the recess; and a wiring layer 29 formed to cover the channel layer 23 which is exposed through the recess, the side wall insulator 28, and the insulating film.
摘要翻译：功率MOSFET包括：第一导电类型的半导体衬底21; 第一导电类型的漏极层22，并形成在衬底的表面层上; 形成在漏极层22上的部分区域中的栅极绝缘膜25; 形成在栅极绝缘膜25上的栅电极26; 形成在栅电极上的绝缘膜27; 形成在栅极绝缘膜25，栅电极26和绝缘膜27的侧壁上的侧壁绝缘体28; 在漏极层22上形成的凹部和形成有栅电极25和侧壁绝缘体28的区域以外的区域; 与第一导电型相反的第二导电类型的沟道层23形成在从形成凹部的区域到形成栅电极26的区域附近的范围内; 一个导电类型的源极区24，并形成在凹槽外部的沟道层23上; 以及形成为覆盖通过凹部暴露的沟道层23，侧壁绝缘体28和绝缘膜的布线层29。

57. 发明申请

US20050184406A1 Semiconductor device 审中-公开
标题翻译：半导体器件
公开(公告)号：US20050184406A1
公开(公告)日：2005-08-25
申请号：US11061730
申请日：2005-02-22
申请人： Tetsuya Okada , Hiroaki Saito
发明人： Tetsuya Okada , Hiroaki Saito
IPC分类号： H01L29/872 , H01L29/47 , H01L29/861 , H01L31/062
CPC分类号： H01L29/872 , H01L29/861
摘要： Conventionally, VF and IR characteristics of a Schottky barrier diode are in a tradeoff relation and there is a problem in that an increase in a leak current is unavoidable in order to realize a reduction in VF. To solve the problem, p type semiconductor regions of a pillar shape reaching an n+ type semiconductor substrate are provided in an n− type semiconductor layer. When a reverse voltage is applied, a depletion layer expanding in a substrate horizontal direction from the p type semiconductor regions fills the n− type semiconductor layer. Thus, it is possible to prevent the leak current generated on a Schottky junction interface from leaking to a cathode side. Since an impurity concentration of the n− type semiconductor layer can be increased to a degree at which the depletion layer expanding from the p type semiconductor regions adjacent to each other can be pinched off, it is possible to realize a reduction in VF and it is possible to secure a predetermined breakdown voltage if only the depletion layer is pinched off.
摘要翻译：通常，肖特基势垒二极管的VF和IR特性是权衡关系的，并且存在为了实现VF的降低而不可避免地增加泄漏电流的问题。为了解决这个问题，在n型半导体层中设置了到n +型半导体衬底的柱状的p型半导体区域。当施加反向电压时，从p型半导体区域沿衬底水平方向膨胀的耗尽层填充n型半导体层。因此，可以防止在肖特基结界面上产生的泄漏电流泄漏到阴极侧。由于可以将n型半导体层的杂质浓度提高到从相邻的p型半导体区域扩大的耗尽层被夹除的程度，所以可以实现VF的降低，如果只有耗尽层被夹掉，则可以确保预定的击穿电压。

58. 发明申请

US20050167748A1 Insulated gate-type semiconductor device and manufacturing method of the same 有权
标题翻译：绝缘栅型半导体器件及其制造方法
公开(公告)号：US20050167748A1
公开(公告)日：2005-08-04
申请号：US11023961
申请日：2004-12-29
申请人： Masahito Onda , Hirotoshi Kubo , Shouji Miyahara , Hiroyasu Ishida , Hiroaki Saito
发明人： Masahito Onda , Hirotoshi Kubo , Shouji Miyahara , Hiroyasu Ishida , Hiroaki Saito
IPC分类号： H01L29/417 , H01L21/265 , H01L21/336 , H01L29/08 , H01L29/41 , H01L29/423 , H01L29/49 , H01L29/72 , H01L29/739 , H01L29/76 , H01L29/78
CPC分类号： H01L29/7813 , H01L21/26586 , H01L29/0869 , H01L29/4236 , H01L29/66727 , H01L29/66734
摘要： An interlayer dielectric film is completely buried in a trench, and failures caused by step coverage is prevented because a source electrode can be formed substantially uniformly on an upper portion of a gate electrode. Also, in the processes of forming a source region, a body region and an interlayer dielectric film, only one mask is necessary so that the device size is reduced to account for placement error of only one mask alignment.
摘要翻译：层间电介质膜被完全埋入沟槽中，由于可以在栅电极的上部基本上均匀地形成源电极，所以防止由台阶覆盖引起的故障。此外，在形成源极区域，体区域和层间电介质膜的过程中，仅需要一个掩模，使得器件尺寸减小以仅考虑一个掩模对准的放置误差。

59. 发明授权

US06760187B2 Hydrodynamic bearing and disk apparatus 失效
标题翻译：流体动力轴承和圆盘装置
公开(公告)号：US06760187B2
公开(公告)日：2004-07-06
申请号：US10170752
申请日：2002-06-13
申请人： Takafumi Asada , Hiroaki Saito , Hideaki Ohno
发明人： Takafumi Asada , Hiroaki Saito , Hideaki Ohno
IPC分类号： G11B1702
CPC分类号： F16C33/107 , F16C17/107 , F16C33/103 , F16C2240/46 , F16C2240/70 , F16C2370/12 , G11B19/2009
摘要： In a hydrodynamic bearing according to the present invention a fixed shaft has different diameter sizes by positions so that overflow or splashing of lubricant out of the apparatus is prevented due to a centrifugal force during high-speed rotation, and lubricant reservoirs are provided in narrower clearances and in wider clearances so that the lubricant is induced to move toward lubricant reservoirs in narrower clearances due to surface tension while the hydrodynamic bearing is in stop, therefore overflow of the lubricant is prevented at the time of starting up.
摘要翻译：在根据本发明的流体动力轴承中，固定轴通过位置具有不同的直径尺寸，使得由于高速旋转期间的离心力而防止润滑剂从设备中溢出或飞溅，并且在较窄的间隙中提供润滑剂储存器并且在更宽的间隙中，使得润滑剂由于表面张力而在更窄的间隙中朝向润滑剂储存器移动，同时流体动力轴承停止，因此在启动时防止润滑剂的溢出。

60. 发明授权

US06395604B1 Method of fabricating semiconductor device 有权
标题翻译：制造半导体器件的方法
公开(公告)号：US06395604B1
公开(公告)日：2002-05-28
申请号：US09652013
申请日：2000-08-31
申请人： Hirotoshi Kubo , Hiroaki Saito , Masanao Kitagawa , Eiichiroh Kuwako
发明人： Hirotoshi Kubo , Hiroaki Saito , Masanao Kitagawa , Eiichiroh Kuwako
IPC分类号： H01L21336
CPC分类号： H01L29/7813 , H01L29/4232 , H01L29/4238
摘要： The present invention improves the characteristic of a trench-type vertical MOSFET. When a trench 23 serving as a gate 25 is formed, it is made in a shape of “&ggr;” which is convex toward the inside of the trench. Thus, the surface area of the trench is reduced so that both gate-source capacitance and gate-drain capacitance can be reduced, thereby shortening the switching time of the MOSFET.
摘要翻译：本发明改进了沟槽型垂直MOSFET的特性。当形成用作栅极25的沟槽23时，其形成为朝向沟槽内部凸出的“γ”形状。因此，沟槽的表面积减小，从而可以减小栅极 - 源极电容和栅极 - 漏极电容，从而缩短MOSFET的开关时间。

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