发明授权
US06433360B1 Structure and method of testing failed or returned die to determine failure location and type 失效
测试的结构和方法失败或返回模具以确定故障位置和类型

Structure and method of testing failed or returned die to determine failure location and type
摘要:
A structure and method for testing a failed integrated circuit device includes a ball grid array substrate with its heat sink removed to form a cavity where a failed bare die is to be placed. An adhesive tape is attached to the lower surface of the ball grid array substrate covering the cavity, and the die is placed into the cavity against the sticky side of the adhesive tape. Wire bonds are formed from necessary pads on the die to electrical conductors on the substrate and the cavity and bond wires are covered with epoxy. When the epoxy is cured, the adhesive tape is removed, thus exposing the back side of the die for visual inspection while under test.
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