Patent ID: 8728865

Claim:
A method of making a microelectronic assembly comprising: providing a microelectronic package including a substrate, a microelectronic element overlying said substrate and at least two conductive masses projecting from a surface of said substrate, first and second conductive masses of said at least two conductive masses having surfaces remote from said surface of said substrate and being electrically connected through said substrate to said microelectronic element for carrying a first signal electric potential on said first conductive mass and for simultaneously carrying a second electric potential on said second conductive mass, said second electric potential being different from said first signal electric potential; molding a dielectric material around said at least two conductive masses for supporting said microelectronic package so as to planarize said remote surfaces of said at least two conductive masses and so that said remote surfaces of said at least two conductive masses remain accessible and exposed within openings in an exterior surface of the molded dielectric material, wherein said molding is performed in such manner that said exposed remote surfaces are disposed at heights from said surface of said substrate less than a height of said exterior surface of the molded dielectric material from said surface of said substrate at edges of the corresponding openings in which said conductive masses are disposed.