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Stacked semiconductor devices and methods of forming same

  • US 9,496,189 B2
  • Filed: 10/17/2014
  • Issued: 11/15/2016
  • Est. Priority Date: 06/13/2014
  • Status: Active Grant
First Claim
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1. A method comprising:

  • forming a semiconductor device, the semiconductor device comprising integrated circuit dies, the semiconductor device having at least one test pad per integrated circuit die on a first side of the semiconductor device and having at least one external connector per integrated circuit die disposed on the first side of the semiconductor device;

    mounting first tier workpieces on the first side of the semiconductor device, thereby forming first tier stacks, wherein the first tier workpieces are electrically coupled to corresponding integrated circuit dies, wherein the at least one test pad per integrated circuit die is interposed between a respective first tier workpiece on the integrated circuit die and the respective at least one external connector on the integrated circuit die; and

    testing each of the first tier stacks and identifying first known good stacks and first known bad stacks.

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