Method of manufacturing a dual wafer tunneling gyroscope

    公开(公告)号:US20030013246A1

    公开(公告)日:2003-01-16

    申请号:US10223874

    申请日:2002-08-20

    Abstract: A method of making a micro electromechanical gyroscope. A cantilevered beam structure, first portions of side drive electrodes and a mating structure are defined on a first substrate or wafer; and at least one contact structure, second portions of the side drive electrodes and a mating structure are defined on a second substrate or wafer, the mating structure on the second substrate or wafer being of a complementary shape to the mating structure on the first substrate or wafer and the first and second portions of the side drive electrodes being of a complementary shape to each other. A bonding layer, preferably a eutectic bonding layer, is provided on at least one of the mating structures and one or the first and second portions of the side drive electrodes. The mating structure of the first substrate is moved into a confronting relationship with the mating structure of the second substrate or wafer. Pressure is applied between the two substrates so as to cause a bond to occur between the two mating structures at the bonding or eutectic layer and also between the first and second portions of the side drive electrodes to cause a bond to occur therebetween. Then the first substrate or wafer is removed to free the cantilevered beam structure for movement relative to the second substrate or wafer. The bonds are preferably eutectic bonds.

    Method for controlled cleaving process
    139.
    发明授权
    Method for controlled cleaving process 有权
    控制裂解过程的方法

    公开(公告)号:US6033974A

    公开(公告)日:2000-03-07

    申请号:US370975

    申请日:1999-08-10

    Abstract: A technique for forming a film of material (12) from a donor substrate (10). The technique has a step of forming a stressed region in a selected manner at a selected depth (20) underneath the surface. An energy source such as pressurized fluid is directed to a selected region of the donor substrate to initiate a controlled cleaving action of the substrate (10) at the selected depth (20), whereupon the cleaving action provides an expanding cleave front to free the donor material from a remaining portion of the donor substrate.

    Abstract translation: 一种用于从供体衬底(10)形成材料(12)的膜的技术。 该技术具有以选定的方式在表面下方的选定深度(20)处形成应力区域的步骤。 诸如加压流体的能量源被引导到供体基底的选定区域,以在所选择的深度(20)处引发基底(10)的受控切割作用,因此所述切割动作提供扩张切割前缘以释放供体 来自供体衬底的剩余部分的材料。

    Method of manufacturing a semiconductor accelerometer
    140.
    发明授权
    Method of manufacturing a semiconductor accelerometer 失效
    制造半导体加速度计的方法

    公开(公告)号:US5656512A

    公开(公告)日:1997-08-12

    申请号:US457643

    申请日:1995-05-31

    Abstract: A semiconductor accelerometer is formed by attaching a semiconductor layer to a handle wafer by a thick oxide layer. Accelerometer geometry is patterned in the semiconductor layer, which is then used as a mask to etch out a cavity in the underlying thick oxide. The mask may include one or more apertures, so that a mass region will have corresponding apertures to the underlying oxide layer. The structure resulting from an oxide etch has the intended accelerometer geometry of a large volume mass region supported in cantilever fashion by a plurality of piezo-resistive arm regions to a surrounding, supporting portion of the semiconductor layer. Directly beneath this accelerometer geometry is a flex-accommodating cavity realized by the removal of the underlying oxide layer. The semiconductor layer remains attached to the handle wafer by means of the thick oxide layer that surrounds the accelerometer geometry, and which was adequately masked by the surrounding portion of the top semiconductor layer during the oxide etch step. In a second embodiment support arm regions are dimensioned separately from the mass region, using a plurality of buried oxide regions as semiconductor etch stops.

    Abstract translation: 半导体加速度计是通过用厚的氧化物层将半导体层附着在手柄晶片上形成的。 加速度传感器几何形状在半导体层中图案化,然后将其用作掩模以蚀刻下面的厚氧化物中的空腔。 掩模可以包括一个或多个孔,使得质量区域将具有到下面的氧化物层的对应的孔。 由氧化物蚀刻产生的结构具有通过多个压阻臂区域以半悬臂方式支撑到半导体层的周围的支撑部分的大体积质量区域的预期加速度计几何形状。 直接在该加速度计几何形状之下的是通过去除下面的氧化物层而实现的柔性容纳腔。 半导体层通过围绕加速度计几何形状的厚氧化物层保持附着到处理晶片,并且在氧化物蚀刻步骤期间,半导体层被顶部半导体层的周围部分充分掩蔽。 在第二实施例中,使用多个掩埋氧化物区域作为半导体蚀刻停止件,将支撑臂区域与质量区域分开设计。

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