Patent ID: 9147623
Filing Date: 2015-09-29
Classification: H01L

Abstract:
1. A method of manufacturing a microelectronic device, the method comprising: attaching a first microelectronic die to a substrate, the first microelectronic die having a front-side surface facing away from the substrate, and a back-side surface facing the substrate; forming a plurality of first multi-tiered metal spacers on spacer sites at the front-side surface of the first microelectronic die, wherein each first multi-tiered metal spacer has a plurality of stacked spacer elements, and wherein at least one spacer element of the first multi-tiered metal spacers is wire-bonded to a corresponding top side bond pad on a substrate; forming a plurality of second multi-tiered metal spacers on the front-side surface of the first microelectronic die, wherein each second multi-tiered metal spacer has a plurality of stacked spacer elements, and wherein the second multi-tier metal spacers are attached to the spacer sites that are electrically isolated from integrated circuitry of the first microelectronic die; and attaching a back-side surface of a second microelectronic die to the first and second multi-tiered spacers.