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1. 发明授权

US4939456A Position sensor including a thin film indium arsenide magnetoresistor on a permanent magnet 失效
标题翻译：位置传感器包括在永久磁铁上的薄膜砷化铟磁阻
公开(公告)号：US4939456A
公开(公告)日：1990-07-03
申请号：US426249
申请日：1989-10-25
申请人： Donald T. Morelli , Joseph P. Heremans , Dale L. Partin , Christopher M. Thrush , Louis Green
发明人： Donald T. Morelli , Joseph P. Heremans , Dale L. Partin , Christopher M. Thrush , Louis Green
IPC分类号： G01D5/14 , G01D5/16
CPC分类号： G01D5/147
摘要： For increased sensitivity, an improved position sensor includes a magnetic circuit in which the stationary portion includes a permanent magnet whose width is optimally 1.5 times the tooth pitch of the exciter portion of the sensor and the magnet face proximate the exciter includes a thin layer of ferromagnetic material over which is centered a narrow magnetic sensing element, such as a magnetoresistor. The sensing element has a width typically less than the tooth width. The sensing element includes a thin film of a monocrystalline semiconductive material, preferably having only a moderate bulk mobility and a larger band gap, such as indium arsenide. Current carriers flow along the length of the thin film in a surface accumulation layer, effective to provide a significant apparent increase in mobility and conductivity of said semiconductive material, and an actual increase in magnetic sensitivity and temperature insensitivity. The flux density is typically applied by appropriate magnet thickness or choice of magnet material without the need of a flux guide.
摘要翻译：为了提高灵敏度，改进的位置传感器包括一个磁路，其中固定部分包括永磁体，其宽度最好是传感器的激励器部分的齿距的1.5倍，并且靠近激励器的磁体面包括铁磁薄层其上以诸如磁电阻器的窄磁感应元件为中心的材料。感测元件具有通常小于齿宽度的宽度。感测元件包括单晶半导体材料的薄膜，优选仅具有适度的体迁移率和较大的带隙，例如砷化铟。电流载流子沿着表面积累层中的薄膜的长度流动，有效地提供所述半导体材料的迁移率和导电性的明显增加，并且磁敏感性和温度不敏感性的实际增加。磁通密度通常通过适当的磁体厚度或磁体材料的选择来施加，而不需要助焊剂引导。

2. 发明授权

US5491461A Magnetic field sensor on elemental semiconductor substrate with electric field reduction means 失效
标题翻译：具有电场减少装置的元素半导体衬底上的磁场传感器
公开(公告)号：US5491461A
公开(公告)日：1996-02-13
申请号：US239772
申请日：1994-05-09
申请人： Dale L. Partin , Joseph P. Heremans , Louis Green
发明人： Dale L. Partin , Joseph P. Heremans , Louis Green
IPC分类号： G01R33/06 , H01L43/10 , H01L43/00
CPC分类号： G01R33/06 , H01L27/22 , H01L43/08 , H01L43/10
摘要： A magnetic field sensor apparatus that comprises an active layer of indium antimonide or indium arsenide supported on an elemental semiconductor substrate. Magnetoresistor sensors of indium antimonide and indium arsenide active layers on silicon and germanium substrate wafers are described. Means are described for providing reduced electric fields and parasitic conduction in the elemental semiconductor substrate. The means includes unique device geometries and buffer layers between the active layers and the substrate wafers.
摘要翻译：一种磁场传感器装置，其包括负载在元素半导体衬底上的铟锑化物或砷化铟的活性层。描述了硅和锗衬底晶片上的锑化铟和砷化铟活性层的磁敏电阻传感器。描述了用于在元素半导体衬底中提供减小的电场和寄生导通的装置。该装置包括在有源层和衬底晶片之间的独特的器件几何形状和缓冲层。

3. 发明授权

US06729996B2 Field responsive fluids for lubrication and power transmission 失效
标题翻译：用于润滑和动力传递的现场响应流体
公开(公告)号：US06729996B2
公开(公告)日：2004-05-04
申请号：US10132583
申请日：2002-04-25
申请人： Louis Green , Leonid Charles Lev , Dexter Dean Snyder
发明人： Louis Green , Leonid Charles Lev , Dexter Dean Snyder
IPC分类号： F16H1501
CPC分类号： F16H15/01 , F16H15/38
摘要： A transmission device that includes a driving member and a driven member in frictional engagement with the driving member. A traction fluid is included at a contact between the driving and driven members. The traction fluid is a field responsive fluid that is capable of changing its rheological properties in response to an external field.
摘要翻译：一种传动装置，包括与驱动构件摩擦接合的驱动构件和从动构件。牵引流体包括在驱动部件和被驱动部件之间的接触处。牵引流体是能够响应于外部场而改变其流变特性的场响应流体。

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