Patent ID: 9559077
Date: 2017-01-31
CPC Classifications: H01L

Claim:
1. A method for forming a packaged semiconductor device, comprising: attaching a first major surface of a semiconductor die to a plurality of protrusions extending from a package substrate, wherein no bond pads are located on the first major surface, wherein a top surface of each protrusion has a die attach material, wherein the die attach material directly contacts the first major surface and the top surface of each protrusion, and wherein the attaching results in a space under exposed portions of the first major surface of the semiconductor die between the plurality of protrusions; forming interconnects between bond pads located on a second major surface of the semiconductor die and the package substrate subsequent to the attaching, wherein the second major surface is opposite the first major surface; filling the space with underfill material subsequent to the forming the interconnects; and forming an encapsulant material over the semiconductor die and the interconnects subsequent to the filling the space.