Silicon micromachined CO.sub.2 cleaning nozzle and method
    4.
    发明授权
    Silicon micromachined CO.sub.2 cleaning nozzle and method 失效
    硅微加工二氧化碳清洗喷嘴及方法

    公开(公告)号:US5545073A

    公开(公告)日:1996-08-13

    申请号:US43943

    申请日:1993-04-05

    CPC classification number: B05B1/005 B24C1/003 B24C5/04 B05B7/14

    Abstract: An apparatus and method for cleaning a workpiece with abrasive CO.sub.2 snow operates with a nozzle for creating and expelling the snow. The nozzle includes an upstream section for receiving CO.sub.2 in a gaseous form, and having a first contour shaped for subsonic flow of the CO.sub.2. The nozzle also includes a downstream section for directing the flow of the CO.sub.2 and the snow toward the workpiece, with the downstream section having a second contour shaped for supersonic flow of the CO.sub.2. The nozzle includes a throat section, interposed between the upstream and downstream sections, for changing the CO.sub.2 from the gaseous phase along a constant entropy line to a gas and snow mixture within the downstream section at a speed of at least Mach 1.0. In this manner, additional kinetic energy is imparted to the snow by delaying the conversion into the solid phase until the gaseous CO.sub.2 reaches supersonic speeds.

    Abstract translation: 用研磨二氧化碳雪清洁工件的设备和方法与用于产生和排出雪的喷嘴一起工作。 喷嘴包括用于接收气体形式的CO 2的上游部分,并且具有成形为CO 2的亚音速流的第一轮廓。 喷嘴还包括用于将CO 2和雪的流动引向工件的下游部分,其中下游部分具有成形为用于CO 2的超音速流动的第二轮廓。 喷嘴包括插入在上游部分和下游部分之间的喉部,用于将CO 2从气相沿着恒定的熵线以至少马赫数为1.0的速度在下游部分内改变为气体和混合物。 以这种方式,通过延迟转化为固相直到气态CO 2达到超音速速度,赋予雪额外的动能。

    Printed circuit board with bi-metallic heat spreader
    5.
    发明授权
    Printed circuit board with bi-metallic heat spreader 失效
    带双金属散热器的印刷电路板

    公开(公告)号:US5469329A

    公开(公告)日:1995-11-21

    申请号:US287033

    申请日:1994-08-08

    CPC classification number: H05K7/20509 H01L2924/0002

    Abstract: A printed wiring board adapted to mount electronic devices including one or more heat spreaders secured to the wiring board, the heat spreaders being formed of a material having high thermal conductivity, each heat spreader being adapted to support an electronic device which is bonded to the heat spreader, the portion of the heat spreader adjacent the electronic device having a metallic layer of low coefficient of thermal expansion that provides a localized area having a coefficient of thermal expansion that is approximately the same as that of the electronic device thereby tending to eliminate thermal stresses in the bond material used to attach the electronic device to the heat spreader, the relatively high thermally conductive material allowing thermal energy to be transferred effectively from the electronic device through the heat spreader to an adjacent heat sink.

    Abstract translation: 一种适于安装电子装置的印刷电路板,其包括固定到所述布线板的一个或多个散热器,所述散热器由具有高导热性的材料形成,每个散热器适于支撑结合到所述热的电子装置 散热器,靠近电子设备的散热器的部分具有低热膨胀系数的金属层,其提供具有与电子设备大致相同的热膨胀系数的局部区域,从而有助于消除热应力 在用于将电子设备连接到散热器的粘合材料中,相对高的导热材料允许热能从电子设备通过散热器有效地传递到相邻的散热器。

    Non-contact optical system for production testing of electronic assemblies
    7.
    发明授权
    Non-contact optical system for production testing of electronic assemblies 有权
    用于电子组件生产测试的非接触式光学系统

    公开(公告)号:US07030977B2

    公开(公告)日:2006-04-18

    申请号:US10430669

    申请日:2003-05-06

    CPC classification number: H05K13/08

    Abstract: The present invention provides a system for the contactless testing and configuring of electronic assemblies during the manufacturing process. The system includes an onboard optical transceiver, a system controller, and a controller optical transceiver. The onboard optical transceiver is located on the electronic assembly. The onboard optical transceiver is connected to an integrated circuit which is capable of performing functional tests or storing programs on the assembly. The controller optical transceiver is connected to the system controller and located adjacent to the electronic assembly. The onboard transceiver and the controller optical transceiver are used to establish a contactless communication link between the system controller and the electronic assembly. The contactless nature of the communication link allows the assembly to be transported past the controller optical transceiver by a simple conveyor while the system controller is communicating with the electronic assembly.

    Abstract translation: 本发明提供了一种用于在制造过程中非接触式测试和配置电子组件的系统。 该系统包括板载光收发器,系统控制器和控制器光收发器。 车载光收发器位于电子组件上。 板载光收发器连接到能够对组件进行功能测试或存储程序的集成电路。 控制器光收发器连接到系统控制器并位于电子组件附近。 板载收发器和控制器光收发器用于在系统控制器和电子组件之间建立非接触式通信链路。 通信链路的非接触性质允许组件通过简单的传送带传输通过控制器光收发器,同时系统控制器与电子组件通信。

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