Patent ID: 7981245
Filing Date: 2011-07-19
Classification: H01L,H05K,Y10T

Abstract:
1. A method of making a multi-layered interconnect structure, comprising: providing a thermally conductive layer including first and second opposing surfaces; positioning a first liquid crystal polymer (LCP) dielectric layer on the first opposing surface of the thermally conductive layer with no extrinsic adhesive material therebetween, wherein the first LCP dielectric layer comprises a first LCP dielectric material, and wherein the first LCP dielectric layer includes a first LCP dielectric sublayer positioned on the first opposing surface of the thermally conductive layer; positioning a second LCP dielectric layer on the second opposing surface of the thermally conductive layer with no extrinsic adhesive material therebetween, wherein the second LCP dielectric layer comprises a second LCP dielectric material, and wherein the second LCP dielectric layer includes a second LCP dielectric sublayer positioned on the second opposing surface of the thermally conductive layer, the second LCP dielectric sublayer comprising a first plurality of shielded signal conductors; heating the first and second LCP layers; subjecting the first and second LCP dielectric layers to a first and second temperature that are less than a liquid crystal transition temperature of the first and second LCP dielectric materials, respectively, for a dwell time and at an elevated pressure that is sufficient to cause the first and second LCP dielectric materials to plastically deform and to cause: first and second pluralities of electrically conductive members positioned on the first and second LCP dielectric layers, respectively; passing a plated through hole through the multi-layered interconnect structure electrically connecting at least one member of the first plurality of electrically conductive members, to at least one of the first plurality of shielded signal conductors, and to at least one member of the second plurality of electrically conductive members; and positioning a third dielectric layer on the first LCP dielectric layer and on portions of the first plurality of electrically conductive members, the third dielectric layer substantially overlying the plated through hole, and the third dielectric layer includes a high density interconnect layer for providing an electrical path from a first electronic device to the first plurality of shielded signal conductors.