Patent ID: 6090641
Filing Date: 2000-07-18
Classification: H01L,H05K,Y10T

Abstract:
A method of reducing voids in a bond between a semiconductor microchip and a circuit board, said method comprising:forming a center core bond portion, said center core bond portion being formed to a size substantially greater than half of but slightly less than the microchip's full size, and having similar aspect ratio thereto;placing the center core bond portion on the circuit board;forming a perimeter bond portion of material that is molecularly compatible with the center core bond portion;placing said perimeter bond portion around the center core bond portion on said circuit board such that the perimeter bond portion does not overlap the center core bond portion, such that the perimeter bond portion forms a composite and indiscernible bond with the center core bond portion after a curing process, and such that the perimeter bond portion's resulting outer boundary meets or exceeds the microchip's outer edge;at least partially curing the circuit board and the center core and perimeter bond portions;placing the semiconductor microchip onto the center core and perimeter bond portions such that the center core bond portion will bond with the microchip's center; andcuring the semiconductor microchip and the center core and perimeter bond portions.