Patent ID: 8722467
Filing Date: 2014-05-13
Classification: H01L

Abstract:
1. A die attach method for a semiconductor chip including a back metal layer located at the back surface of the semiconductor chip comprising: forming a bonding bump array including a plurality of bonding bumps with a same height on a die attach area at a top surface of a die paddle; depositing a die attach material in the bonding bump array area with a thickness of the die attach material equal or slightly larger than the height of the bonding bump; attaching the semiconductor chip to the bonding bump array at the top surface of the die paddle by the die attach material, wherein the die attach material and the bonding bump array are located between the back metal layer of the semiconductor chip and the top surface of the die paddle wherein the bonding bump array controls a bond line thickness of the die attach material between the back metal layer and the top surface of the die paddle and prevents the semiconductor chip from rotating on the die attach material when the die attach material is melted.