Patent ID: 9666560
Date: 2017-05-30
CPC Classifications: H01L

Claim:
1. A method of making an assembly, comprising: forming a circuit structure mechanically coupled to a surface of a carrier, the forming including forming a first dielectric layer mechanically coupled to the carrier, forming contacts and a plurality of traces supported by the first dielectric layer, at least some of the traces having first widths less than five micrometers, forming a second dielectric layer mechanically coupled with the first dielectric layer, the circuit structure having electrically conductive features at a surface of the second dielectric layer, wherein the circuit structure includes a plurality of circuit structure contacts for joining with a plurality of element contacts of each of a plurality of microelectronic elements in a state of the circuit structure contacts being juxtaposed with the element contacts of the microelectronic elements; electrically coupling the conductive features with a plurality of contacts at a first surface of a dielectric element juxtaposed with the features and the second dielectric layer of the circuit structure, the dielectric element having at least one dielectric layer, wherein substantially rigid electrically conductive posts project above a second surface of the dielectric element opposite from the first surface, the posts electrically coupled with the contacts; and planarizing ends of substantially rigid conductive posts remote from the second surface of the dielectric element; and separating the circuit structure from the carrier.