Patent ID: 8647924
Filing Date: 2014-02-11
Classification: H01L

Abstract:
1. A method of forming devices comprising: providing a temporary substrate having a temporary mounting surface; providing a plurality of first and second singulated chips, wherein a singulated chip is a chip singulated from a wafer having a plurality of chips prior to temporarily mounting the plurality of first singulated chips to the temporary mounting surface; temporarily mounting the plurality of first singulated chips to the temporary mounting surface, a first singulated chip includes a first bottom surface and a first top surface with first interconnects, wherein first bottom surfaces of the first singulated chips are temporarily mounted to the temporary mounting surface; stacking the second singulated chips on the first top surfaces of the first singulated chips, a second singulated chip includes a second bottom surface with second conductive contacts, wherein the second conductive contacts of the second singulated chips are coupled to the first interconnects on the first top surfaces of the first singulated chips; bonding the first and second singulated chips together to form a plurality of chip stacks; and separating the first bottom surfaces of the first singulated chips from the temporary substrate to separate the chip stacks from the temporary substrate.