Patent ID: 8298874
Filing Date: 2012-10-30
Classification: H01L

Abstract:
1. A method of forming a packaged electronic device, comprising: providing (i) a package substrate having top substrate surface including a die attach region including at least one land pad thereon and a non-die mounting region and (ii) an IC die having a top semiconductor surface including active circuitry and at least one bonding conductor formed on said top semiconductor surface and a bottom surface; forming a dielectric layer on said top substrate surface of said package substrate having a first thickness over said die attach region in regions lateral to said land pad and a second thickness over said non-die mounting region, wherein said second thickness>said first thickness by at least 5 μm, and mounting said IC die to said top substrate surface of said package substrate, and forming an underfill layer to fill a gap between said IC die and said top substrate surface.