Patent ID: 7838973
Filing Date: 2010-11-23
Classification: H01L

Abstract:
1. Leadframe for a semi-conductor device, comprising a die pad for mounting a semi-conductor die and a plurality of leads for connection with the semi-conductor die, the leads being arranged at a distance from the die pad; wherein the die pad has a substantially flat bottom surface and a top surface, the top surface having a die attachment portion and a downbond attachment portion for connecting downbonds, the die attachment surface portion and the downbond attachment surface portion being at different levels from each other; wherein, at least one location between the die attachment surface portion and the downbond attachment surface portion, the top surface of the die pad has at least one third surface portion that is out-of-plane with the die attachment surface portion, and at least one substantially step-shaped surface transition between the die attachment surface portion and said third surface portion.