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    • 24. 发明授权
    • Method for chip testing
    • 芯片测试方法
    • US5899703A
    • 1999-05-04
    • US827207
    • 1997-03-28
    • Howard L. KalterH. Bernhard PoggeGeorge S. ProkopDonald L. Wheater
    • Howard L. KalterH. Bernhard PoggeGeorge S. ProkopDonald L. Wheater
    • G01R31/28H01L23/58G01R31/26H01L21/66
    • H01L22/32G01R31/2884
    • Large area chip functionality is tested at an intermediate level in the manufacturing process. A process sequence is implemented in which a layer of insulator material is deposited over the chip. This layer is then processed to selectively open areas over existing vias which are to be used for chip level testing. The other vias remain covered with insulator. A sacrificial metal level is then deposited on the insulator layer and patterned to create adequately large test pad areas connected to exposed vias. This metal layer and the insulator layer covering the other buried vias are removed after testing to re-establish the full via set. As an extension to this basic test process, test circuits can be formed around or beside the chip to be tested in the kerf areas separating the chip from other chips on the semiconductor wafer. Connections to the test circuits is with a sacrificial metal layer over an insulator layer. The sacrificial metal layer and insulator layer are removed after testing. The test circuits are scribed off in the process of separating the chips after back end of line processing is completed.
    • 大面积芯片功能在制造过程的中间级别进行测试。 实现了在芯片上沉积绝缘体材料层的工艺顺序。 然后将该层处理成选择性地打开将用于芯片级测试的现有通孔上的区域。 其他通孔仍然用绝缘体覆盖。 然后将牺牲金属水平沉积在绝缘体层上并图案化以产生连接到暴露的通孔的足够大的测试焊盘区域。 在测试之后,该金属层和覆盖另一埋孔的绝缘体层被重新建立完整的通孔。 作为这个基本测试过程的延伸,测试电路可以在将芯片与半导体晶片上的其他芯片分开的切口区域中围绕或测试芯片周围形成。 与测试电路的连接在绝缘体层上具有牺牲金属层。 测试后去除牺牲金属层和绝缘体层。 在线路处理后端完成之后分离芯片的过程中,划线测试电路。