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    • 1. 发明授权
    • Scanning electron microscope based parametric testing method and
apparatus
    • 基于扫描电子显微镜的参数测试方法和装置
    • US5159752A
    • 1992-11-03
    • US595920
    • 1990-11-30
    • Shivaling S. Mahant-ShettiThomas J. AtonRebecca J. Gale
    • Shivaling S. Mahant-ShettiThomas J. AtonRebecca J. Gale
    • G01R31/305
    • G01R31/305Y10T29/49155
    • A scanning electron microscope (28) is connected to a test structure (48) formed on a semiconductor wafer. The test structure (48) comprises a plurality of first parallel structures (54) and a plurality of second parallel structure (56) transverse to and interlocking with the first structures (54). An island (60) is formed within a grid (58) formed by the structures (54-56) and is separated therefrom. An electron beam (38) from the scanning electron microscope (28) is aimed at the structure (48) and secondary electrons emitted therefrom are visually displayed on a monitor (44). The visual display (47) provides information on whether the island (60) is electrically separated from the mesh (58) or shorted thereto by comparing the intensity of the various islands (60).
    • 扫描电子显微镜(28)连接到形成在半导体晶片上的测试结构(48)。 测试结构(48)包括多个第一平行结构(54)和与第一结构(54)横向并与其互锁的多个第二平行结构(56)。 岛(60)形成在由结构(54-56)形成的格栅(58)内并与之隔开。 来自扫描电子显微镜(28)的电子束(38)针对结构(48),并且从其发射的二次电子可视地显示在监视器(44)上。 视觉显示(47)提供关于岛(60)是否与网(58)电分离或与其短路的信息,通过比较各岛(60)的强度来提供信息。