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    • 5. 发明授权
    • Circuit access and analysis for a SOI flip-chip die
    • SOI倒装芯片的电路访问和分析
    • US06448095B1
    • 2002-09-10
    • US09755013
    • 2001-01-05
    • Jeffrey D. BirdsleyMichael R. BruceBrennan V. DavisRosalinda M. RingDaniel L. Stone
    • Jeffrey D. BirdsleyMichael R. BruceBrennan V. DavisRosalinda M. RingDaniel L. Stone
    • H01L2100
    • H01L22/20G01R31/307
    • Analysis of a flip-chip type IC die having SOI structure is enhanced via analysis and repair of the die that make possible analysis that would typically result in the die being in a state of disrepair. According to an example embodiment of the present invention, a focused ion beam (FIB) is directed at a back side of a flip-chip die having a circuitry in a circuit side opposite a back side, wherein the circuitry including silicon on insulator (SOI) structure. The FIB is used to remove a selected portion of substrate including a portion of the insulator of the SOI structure from the die. The removed substrate exposes an insulator region in the die, and a signal is coupled from circuitry in the die via the exposed insulator region and used to analyze the die. Material is deposited in the exposed region and the selected portion of the die that had been removed is reconstructed. The reconstruction takes place before, during or after the signal is coupled, depending upon the die being analyzed and the type of analysis being performed. In this manner, access for analyzing the die is improved via the ability to couple a signal through the insulator and to repair a portion of the die that has been altered for analysis. Analysis that would otherwise be destructive can be performed and the ability of the die to function after analysis can be maintained.
    • 具有SOI结构的倒装芯片型IC芯片的分析通过分析和修复模具得到增强,这使得可能的分析通常导致模具处于失修状态。 根据本发明的一个示例性实施例,聚焦离子束(FIB)指向倒装芯片的背面,该倒装芯片的背面具有电路侧的电路,其中包括绝缘体上的硅(SOI) ) 结构体。 FIB用于从芯片去除包括SOI结构的绝缘体的一部分的衬底的选定部分。 去除的衬底暴露了管芯中的绝缘体区域,并且信号通过暴露的绝缘体区域从管芯中的电路耦合并用于分析管芯。 材料沉积在暴露的区域中,并且已经去除的模具的选定部分被重建。 重建在信号耦合之前,期间或之后进行,这取决于正在分析的管芯和正在执行的分析的类型。 以这种方式,通过能够通过绝缘体耦合信号并修复已经被改变以用于分析的芯片的一部分的能力来提高用于分析芯片的访问。 否则可以进行破坏性的分析,可以保持分析后的模具功能的能力。