Patent ID: 6903270

Claim:
A structure comprising: a printed circuit board including a die attached to a top surface of said printed circuit board; said printed circuit board comprising a first layer of metal on a bottom surface of said printed circuit board; said printed circuit board further comprising a second layer of metal on said top surface of said printed circuit board, wherein said second layer of metal is situated below said die; a blind hole extending through said second layer of metal of said printed circuit board, said blind hole being adjacent to said die, said blind hole being filled with a mold compound, said blind hole being unplated, said mold compound surrounding and covering said die, wherein said mold compound is locked into said second layer of metal of said printed circuit board; wherein said printed circuit board further comprises a layer of resin between said first and second layers of metal, wherein said blind hole extends through said layer of resin to form a structure with interlocking cracks and crevices within said layer of resin.