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    • 14. 发明授权
    • Pressure sensor with differential capacitive output
    • 压差传感器具有差分电容输出
    • US09290067B2
    • 2016-03-22
    • US13598763
    • 2012-08-30
    • Andrew C. McNeilYizhen Lin
    • Andrew C. McNeilYizhen Lin
    • G01L9/12B60C23/04
    • G01L9/0072B60C23/0408G01L9/12
    • A MEMS pressure sensor device is provided that can provide both a linear output with regard to external pressure, and a differential capacitance output so as to improve the signal amplitude level. These benefits are provided through use of a rotating proof mass that generates capacitive output from electrodes configured at both ends of the rotating proof mass. Sensor output can then be generated using a difference between the capacitances generated from the ends of the rotating proof mass. An additional benefit of such a configuration is that the differential capacitance output changes in a more linear fashion with respect to external pressure changes than does a capacitive output from traditional MEMS pressure sensors.
    • 提供了可以提供关于外部压力的线性输出和差分电容输出以提高信号幅度电平的MEMS压力传感器装置。 这些优点通过使用旋转检测质量块来提供,该质量体在旋转检验质量体两端配置电极产生电容性输出。 然后可以使用从旋转检测质量块的端部产生的电容之间的差异来生成传感器输出。 这种配置的另外的好处是差分电容输出相对于来自传统MEMS压力传感器的电容输出相对于外部压力变化更线性地变化。
    • 16. 发明授权
    • MEMS device having variable gap width and method of manufacture
    • 具有可变间隙宽度的MEMS器件和制造方法
    • US08927311B2
    • 2015-01-06
    • US13028930
    • 2011-02-16
    • Andrew C. McNeilYizhen LinLisa Z. Zhang
    • Andrew C. McNeilYizhen LinLisa Z. Zhang
    • B81B3/00G01P15/08G01P15/125
    • B81B3/0056B81B7/02B81B2201/0235B81B2203/058B81B2203/06G01P15/0802G01P15/125G01P2015/0831H01L21/6835H01L22/34H01L2924/1461Y10T29/49156
    • A MEMS device (40) includes a base structure (42) and a microstructure (44) suspended above the structure (42). The base structure (42) includes an oxide layer (50) formed on a substrate (48), a structural layer (54) formed on the oxide layer (50), and an insulating layer (56) formed over the structural layer (54). A sacrificial layer (112) is formed overlying the base structure (42), and the microstructure (44) is formed in another structural layer (116) over the sacrificial layer (112). Methodology (90) entails removing the sacrificial layer (112) and a portion of the oxide layer (50) to release the microstructure (44) and to expose a top surface (52) of the substrate (48). Following removal, a width (86) of a gap (80) produced between the microstructure (44) and the top surface (52) is greater than a width (88) of a gap (84) produced between the microstructure (44) and the structural layer (54).
    • MEMS器件(40)包括基部结构(42)和悬挂在结构(42)上方的微结构(44)。 基底结构(42)包括形成在基底(48)上的氧化物层(50),形成在氧化物层(50)上的结构层(54)和形成在结构层(54)上的绝缘层 )。 牺牲层(112)形成在基部结构(42)上方,并且微结构(44)形成在牺牲层(112)上方的另一个结构层(116)中。 方法(90)需要去除牺牲层(112)和氧化物层(50)的一部分以释放微结构(44)并暴露衬底(48)的顶表面(52)。 在移除之后,在微结构(44)和顶表面(52)之间产生的间隙(80)的宽度(86)大于在微结构(44)和微结构(44)之间产生的间隙(84)的宽度(88) 结构层(54)。
    • 17. 发明申请
    • SPRING SYSTEM FOR MEMS DEVICE
    • 用于MEMS器件的弹簧系统
    • US20140230549A1
    • 2014-08-21
    • US13770224
    • 2013-02-19
    • Andrew C. McNeilGary G. Li
    • Andrew C. McNeilGary G. Li
    • G01C19/5684G01C25/00
    • G01C19/5684G01C19/574G01C25/00Y10T29/49002
    • A spring system (74) links a pair of drive masses (30, 32) of a MEMS device (72). The spring system (74) includes stiff beams (76, 78, 80, 82) oriented to form a parallelogram arrangement (84). The beams are oriented diagonal to a drive direction (56) of the masses (30, 32). Diagonally opposing corners (86, 88) of the parallelogram arrangement (84) are coupled to the drive masses (30, 32). A spring (90) is coupled to a corner (94) and a spring (92) is coupled to a diagonally opposing corner (96) of the parallelogram arrangement. The springs (90, 92) are interconnected with a sense frame (34) surrounding the drive masses. The beams and side springs are stiff to substantially prevent in-phase motion (66) of the drive masses. However, rotationally compliant flexures (102, 104, 106, 108), allow the arrangement (84) to collapse and expand to enable anti-phase motion (60) of the drive masses.
    • 弹簧系统(74)连接MEMS装置(72)的一对驱动块(30,32)。 弹簧系统(74)包括定向成形成平行四边形布置(84)的刚性梁(76,78,80,82)。 梁与质量块(30,32)的驱动方向(56)成对角定向。 平行四边形排列(84)的对角线对角(86,88)联接到驱动块(30,32)。 弹簧(90)联接到角部(94)并且弹簧(92)联接到平行四边形布置的对角相对的拐角(96)。 弹簧(90,92)与围绕驱动块的感测框架(34)互连。 梁和侧弹簧是刚性的,以基本上防止驱动块的同相运动(66)。 然而,旋转柔性挠曲件(102,104,106,108)允许装置(84)折叠和膨胀以使得驱动质量块能够进行反相运动(60)。
    • 18. 发明授权
    • Resonant accelerometer with low sensitivity to package stress
    • 谐振加速度计,对包装应力敏感度低
    • US08468887B2
    • 2013-06-25
    • US12102645
    • 2008-04-14
    • Andrew C. McNeilYizhen Lin
    • Andrew C. McNeilYizhen Lin
    • G01P15/00
    • G01P15/097B81B3/0072B81B2201/0235B81B2203/0307G01P15/0802G01P15/18G01P2015/084Y10T29/49009
    • A resonant accelerometer (24) includes a single anchor (28) fixed to a substrate (32). A proof mass (34) is positioned above a surface (30) of the substrate (32) and is positioned symmetrically about the anchor (28). The proof mass (34) has a central opening (38). Each of a number of suspension beams (42, 44, 46, 48) resides in the central opening (38) and has one end (50) affixed to the anchor (28) and another end (52) attached to an inner peripheral wall (40) of the proof mass (34). A resonant frequency of the beams (42, 44) in a direction (64) aligned with a common axis (58) of the beams (42, 44) changes according to acceleration in the direction (64). A resonant frequency of the beams (46, 48) in a direction (66) aligned with a common axis (62) of the beams (46, 48) changes according to acceleration in the direction (66).
    • 谐振加速度计(24)包括固定到基板(32)上的单个锚(28)。 校准质量块(34)位于衬底(32)的表面(30)上方,并且围绕锚(28)对称地定位。 检测质量块(34)具有中心孔(38)。 多个悬挂梁(42,44,46,48)中的每一个都位于中央开口(38)中,并且具有固定到锚固件(28)的一个端部(50),并且另一个端部(52)附接到内周壁 (34)的(40)。 在与梁(42,44)的公共轴(58)对准的方向(64)上的梁(42,44)的共振频率根据方向(64)的加速度而变化。 在与梁(46,48)的共同轴线(62)对准的方向(66)上的梁(46,48)的共振频率根据方向(66)的加速度而变化。
    • 19. 发明授权
    • Laterally integrated MEMS sensor device with multi-stimulus sensing
    • 具有多重刺激感知功能的集成MEMS传感器装置
    • US08387464B2
    • 2013-03-05
    • US12627679
    • 2009-11-30
    • Andrew C. McNeilYizhen LinWoo Tae Park
    • Andrew C. McNeilYizhen LinWoo Tae Park
    • G01L9/12
    • G01L19/0092B81B7/02B81B2201/0235B81B2201/0264G01L9/0047G01L9/0073G01L19/0618G01P15/125G01P2015/0837G01P2015/088Y10T29/49002
    • A microelectromechanical systems (MEMS) sensor device (20) includes a substrate (22) having sensors (24, 26) disposed on the same side (28) of the substrate (22) and laterally spaced apart from one another. The sensor (26) includes a sense element (56), and the substrate (22) includes a cavity (58) extending through the substrate (22) from the backside (30) of the substrate (22) to expose the sense element (56) to an external environment (54). The sense element (56) is movable in response to a stimulus (52) from the environment (54) due to its exposure to the environment (54) via the cavity (58). Fabrication methodology (66) entails concurrently forming the sensors (24, 26) on substrate (22) by implementing MEMS process flow, followed by creating the cavity (58) through the substrate (22) to expose the sense element (56) to the environment (54).
    • 微机电系统(MEMS)传感器装置(20)包括具有设置在基板(22)的同一侧(28)上并且彼此横向间隔开的传感器(24,26)的基板(22)。 传感器(26)包括感测元件(56),并且衬底(22)包括从衬底(22)的背面(30)延伸穿过衬底(22)的空腔(58),以暴露感测元件 56)到外部环境(54)。 响应于来自环境(54)的刺激(52),感测元件(56)由于经由空腔(58)暴露于环境(54)而是可移动的。 制造方法(66)需要通过实施MEMS工艺流程同时在衬底(22)上形成传感器(24,26),随后通过衬底(22)产生空腔(58),以将感测元件(56)暴露于 环境(54)。
    • 20. 发明申请
    • ACCELEROMETER WITH OVER-TRAVEL STOP STRUCTURE
    • 具有超行程停止结构的加速度计
    • US20100223997A1
    • 2010-09-09
    • US12400441
    • 2009-03-09
    • Aaron A. GeisbergerYizhen LinAndrew C. McNeil
    • Aaron A. GeisbergerYizhen LinAndrew C. McNeil
    • G01P15/125
    • G01P15/125G01P2015/0814
    • An accelerometer (50, 100, 120, 130) includes a substrate (58) and a proof mass (54) spaced apart from a surface (56) of the substrate (58). Compliant members (62) are coupled to the proof mass (54) and enable the proof mass (54) to move parallel to the surface (56) of the substrate (58) in a sense direction (68). Proof mass anchors (60) interconnect the compliant members (62) with the surface (56). The accelerometer (50, 100, 120, 130) includes an over-travel stop structure (52, 102, 122, 132) having stop anchors (70, 72) coupled to the substrate (58). The stop anchors (70, 72) are coupled to the substrate (58) at positions (76) on the surface (56) residing at least partially within an anchor attach area (71) bounded in the sense direction (68) by locations (78) of the proof mass anchors (60) on the surface (56).
    • 加速度计(50,100,120,130)包括与衬底(58)的表面(56)间隔开的衬底(58)和校准质量块(54)。 合格构件(62)被耦合到检验质量块(54),并且使检测质量块(54)能够在感测方向(68)上平行于衬底(58)的表面(56)移动。 证明质量锚(60)将顺应构件(62)与表面(56)相互连接。 加速度计(50,100,120,130)包括具有联接到基底(58)的止动锚(70,72)的过度行进止动结构(52,102,122,132)。 停止锚固件(70,72)在表面(56)上的位置(76)处联接到基底(58),所述位置(76)至少部分地位于沿着感测方向(68)限定的锚定附着区域(71)中的位置( 表面(56)上的检验质量锚(60)的表面(78)。