Patent ID: 6635958
Filing Date: 2003-10-21
Classification: H01L,H05K

Abstract:
A surface mount ceramic package for housing an integrated circuit die and adapted to be mounted directly onto a printed circuit board on which there are metallized traces; comprisinga flat core formed of a material that is thermally and electrically conductive; a first ceramic layer disposed on said core and having a cavity formed therein in which said die lies on said core with the first ceramic layer surrounding said cavity; a plurality of metallized feed-throughs formed on an upper surface of said first ceramic layer, each feed-through extending to an inner metallized pad adjacent said cavity; a second ceramic layer disposed on the upper surface of said first ceramic layer and encircling said cavity and covering said metallized feed-throughs but leaving said inner pads available for bonding to said die; outer metallized pads on a lower surface of said first ceramic layer for connecting electrically onto the metallized traces of said printed circuit board; and conductor means within said first ceramic layer connecting said outer metallized pads to respective ones of said feed-throughs; and wherein said core has one or more peripheral access portions that permit access to the lower surface of said first ceramic layer at locations of said outer pads to permit the outer pads to be connected directly to the printed circuit board metal traces.