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    • 1. 发明申请
    • COLLAPSED MODE OPERABLE CMUT INCLUDING CONTOURED SUBSTRATE
    • 收缩模式可操作,包括嵌入式基板
    • WO2009077961A3
    • 2010-09-02
    • PCT/IB2008055279
    • 2008-12-12
    • KONINKL PHILIPS ELECTRONICS NVPETRUZZELLO JOHNFRASER JOHN DOUGLASZHOU SHIWEIDUFORT BENOITLETAVIC THEODORE JAMES
    • PETRUZZELLO JOHNFRASER JOHN DOUGLASZHOU SHIWEIDUFORT BENOITLETAVIC THEODORE JAMES
    • B06B1/02
    • B06B1/0292
    • A capacitive ultrasound transducer capable of operation in collapsed mode either with a reduced bias voltage, or with no bias voltage, is provided. The transducer includes a substrate that is contoured so that a middle region of the flexible membrane is collapsed against the substrate in the absence of a bias voltage. A non-collapsible gap may exists between the substrate and peripheral regions of the flexible membrane. The contour of the substrate may be such as to strain the flexible membrane past the point of collapse, or to mechanically interfere with the flexible membrane. The substrate may include a further membrane disposed beneath the flexible membrane, the further membrane being contoured so that the flexible membrane is collapsed against it. The substrate may a support disposed beneath the further membrane to deflect a corresponding portion of the further membrane upward toward the flexible membrane. The support may be a post. The transducer may be operated in collapse mode with an improved efficiency (k2 eff) as compared to otherwise similar conventional transducers exhibiting comparably uncontoured substrates. A related medical imaging system is provided, which may include an array of such transducers disposed on a common substrate. A method of operating such a transducer is provided that includes operating the transducer in the collapse mode in the absence of a bias voltage.
    • 提供能够以折叠模式操作或者具有降低的偏置电压或没有偏置电压的电容式超声换能器。 换能器包括基底,该基底的轮廓使得柔性膜的中间区域在没有偏置电压的情况下相对于基底折叠。 在柔性膜的基底和周边区域之间可能存在不可收缩的间隙。 衬底的轮廓可以是使柔性膜经过塌陷点,或机械地干涉柔性膜。 衬底可以包括设置在柔性膜下方的另一膜,另外的膜被成形为使得柔性膜相对于其折叠。 衬底可以是设置在另外的膜下方的支撑件,以将另外的膜的相应部分向上朝向柔性膜偏转。 支持可能是一个帖子。 传感器可以在崩溃模式下操作,与具有相当的未构图基底的其它相似的传统换能器相比,效率(k 2 eff)提高。 提供了一种相关的医学成像系统,其可以包括设置在公共基底上的这种换能器阵列。 提供了一种操作这种换能器的方法,其包括在没有偏置电压的情况下以折叠模式操作换能器。
    • 8. 发明申请
    • LATERAL INSULATED-GATE BIPOLAR TRANSISTOR (LIGBT) DEVICE IN SILICON-ON-INSULATOR (SOI) TECHNOLOGY
    • 硅绝缘体(SOI)技术中的横向绝缘栅双极型晶体管(LIGBT)器件
    • WO0145142A3
    • 2001-12-06
    • PCT/EP0011929
    • 2000-11-29
    • KONINKL PHILIPS ELECTRONICS NV
    • PETRUZZELLO JOHNLETAVIC THEODOREVAN ZWOL JOHANNES
    • H01L29/786H01L29/06H01L29/423H01L29/739
    • H01L29/7394H01L29/0696H01L29/42368
    • A lateral thin-film Silicon-On-Insulator (SOI) device (20) includes a semiconductor substrate (22), a buried insulating layer (24) on the substrate and a Lateral Insulated Gate Bipolar Transistor (LIGBT) device in an SOI layer on the buried insulating layer (24) and having a source region (28) of a first conductivity type formed in a body region (30) of a second conductivity type opposite to that of the first and a body contact region (40) of the second conductivity type in the body region (30) and connected to the source region (28). A lateral drift region (32a) of a first conductivity type is provided adjacent the body region (30) and forms a lightly-doped drain region, and a drain contact region (34) of the first conductivity type is provided laterally spaced apart from the body region by the drift region with an anode region (42) of the second conductivity type in the drain region and connected to the drain contact region (34). A gate electrode (36) is provided over a part of the body region in which a channel region is formed during operation and extending over a part of the lateral drift region (32a) adjacent the body region (30), with the gate electrode (36) being at least substantially insulated from the body region and drift region by a surface insulation region (38). Improved device performance is achieved by making a dimension of the source region in a direction normal to a direction of current flow between the source region (28) and the drain contact region (34) greater than a corresponding dimension of the drain contact region and of the anode region (42).
    • 横向薄膜绝缘体上硅(SOI)器件(20)包括半导体衬底(22),衬底上的掩埋绝缘层(24)和SOI层中的横向绝缘栅双极晶体管(LIGBT)器件 在所述掩埋绝缘层(24)上并且具有形成在与所述第一导电类型的所述第一导电类型的所述第一导电类型的本体区域(30)相反的第二导电类型的源区域(28)和所述第一导电类型的本体接触区域(40) 在所述体区域(30)中并连接到所述源极区域(28)的第二导电类型。 第一导电类型的横向漂移区域(32a)与本体区域(30)相邻设置并形成轻掺杂漏极区域,并且第一导电类型的漏极接触区域(34)与第一导电类型的漏极接触区域 通过所述漂移区与所述漏极区中的所述第二导电类型的阳极区(42)连接并且与所述漏极接触区(34)连接。 栅电极(36)设置在体区的一部分上,其中在工作期间形成沟道区并且在与体区(30)相邻的横向漂移区(32a)的一部分上延伸,栅电极( 36)通过表面绝缘区域(38)至少基本上与本体区域和漂移区域绝缘。 通过使在与源极区域(28)和漏极接触区域(34)之间的电流流动方向垂直的方向上的源极区域的尺寸大于漏极接触区域的对应尺寸和 阳极区域(42)。