Patent ID: 6841858
Filing Date: 2005-01-11
Classification: H01L

Abstract:
1. A leadframe design, comprising: an inner die pad structure lying in a first plane; an outer die pad structure lying in a second plane spaced apart from the inner die pad structure first plane and connected to the inner die pad by inner tie bars, the outer die pad structure is ring shaped and surrounds the inner die pad structure; an outer package surrounding at least the inner die pad structure and the inner tie bars; the outer die pad structure being supported by outer tie bars; the outer package having outer walls; and lead fingers extending through the outer package outer walls; the lead fingers including an inner portions extending into the outer package proximate the inner and outer die pad structures; the inner portions of the lead fingers lying in a third plane; wherein at least one of the inner die pad structure first plane and the outer die pad structure second plane lie outside of the lead finger inner portions third plane and wherein a first chip is affixed to the inner die pad structure and a second chip is affixed to the outer die pad structure.