Patent ID: 8525309
Filing Date: 2013-09-03
Classification: H01L,Y10T

Abstract:
1. A microelectronic unit, comprising: a lead frame having a plurality of monolithic lead fingers extending in a plane of the lead frame, each lead finger having a fan-out portion and a chip connection portion, each fan-out portion extending in the lead frame plane, the fan-out portions having first and second opposed surfaces and a first thickness in a first direction between the opposed surfaces, each chip connection portion extending in the lead frame plane, the chip connection portions having a second thickness smaller than the first thickness, the chip connection portions defining a first recess below the first surface and a second recess below the second surface; a first device chip having a plurality of at least one of passive devices or active devices, having contacts thereon facing the chip connection portions and electrically coupled thereto, wherein at least a portion of a thickness of the first device chip extends within the first recess; and a second device chip overlying and electrically coupled with the first device chip through electrical interconnections extending at least one of along or within the first and second device chips, wherein at least a portion of a thickness of the second device chip extends within the second recess.