Patent ID: 8193615
Filing Date: 2012-06-05
Classification: H01L

Abstract:
1. A microelectronic unit, comprising: a semiconductor element having a front surface and a rear surface opposite the front surface, a microelectronic semiconductor device adjacent to the front surface, and contacts at the front surface, the semiconductor element having through holes extending from the rear surface through the semiconductor element and through the contacts, the contacts having outer surfaces facing away from the semiconductor element, and inner surfaces opposite from the outer surfaces, the through holes defining wall surfaces extending within the contacts from the inner surfaces towards the outer surfaces; a monolithic dielectric layer lining portions of the through holes and overlying at least portions of the inner surfaces; and a conductive element overlying the dielectric layer within the through holes, the conductive element contacting at least the wall surfaces within the contacts so as to conductively interconnect the contacts with unit contacts.