Patent ID: 8918990

Claim:
A method of forming solder-less printed wiring boards, comprising; attaching a plurality of electronic components having bondable contacts to a workpiece using an adhesive material; adding a mold material to partially cover said plurality of electronic components to form a sub-assembly comprising said plurality of electronic components attached to said mold material and a planar surface on said workpiece, wherein at least tops of said plurality of electronic components extend beyond a height of said mold material; after adding said mold material, encapsulating said plurality of electronic components with a dissolvable material different from said mold material to create a flat surface; dissolving said adhesive material to separate said workpiece and said sub-assembly; attaching a first prepreg dielectric to said planar surface of said mold material of said sub-assembly; forming a plurality of first vias in said first prepreg dielectric to expose said bondable contacts of said plurality of electronic components; filling said first vias with electrically conductive plugs to provide connections to said bondable contacts of said plurality of electronic components, and forming a circuit layer comprising a first plurality of metal traces on a surface of said first prepreg dielectric, wherein said first plurality of metal traces provide contact to said first plugs.