Patent ID: 6104095
Filing Date: 2000-08-15
Classification: H01L

Abstract:
A printed circuit board for use in manufacturing chip-on-board packages, comprising:a board body having an upper surface and a lower surface;a chip bonding area on the upper surface for accommodating a semiconductor chip;a plurality of conductors in a circuit pattern on the upper surface outside the chip bonding area, for electrical connection to the semiconductor chip using a plurality of bonding wires;external contacts on the lower surface for electrical connection to an external electrical appliance;via holes extending through the board body for electrically connecting the plurality of conductors in the circuit pattern to the external contacts; anda plurality of protrusions extending upwardly from the plane of the upper surface of said board body at locations outside said chip bonding area but within an encapsulation region, which is to be covered by an encapsulant molded to the board body, said encapsulating region encircling said chip bonding area, a portion of said upper surface, and only inner end portions of said plurality of conductors, said protrusions being pre-designed to regulate the volume of molding compound used to form the encapsulant to one which will not cause the chip to warp during the molding process of forming the encapsulant.