Patent ID: 8884427
Filing Date: 2014-11-11
Classification: H01L,H05K

Abstract:
1. A microelectronic assembly, comprising: a dielectric region having a first surface, a second surface opposite the first surface, and a plurality of traces extending in at least one direction parallel to the first and second surfaces and a plurality of contacts at the first surface of the dielectric region; a plurality of electrically conductive elements coupled to the traces and projecting above the second surface; an encapsulant extending above the second surface, the encapsulant filling spaces between adjacent conductive elements and having a surface overlying and facing away from the second surface, wherein ends of the conductive elements are at the surface of the encapsulant; a microelectronic element having a face and a plurality of element contacts at the face, the element contacts facing and joined to the plurality of contacts, wherein the encapsulant has a coefficient of thermal expansion (CTE) no greater than twice a CTE associated with at least one of the dielectric region or the microelectronic element.