Patent ID: 6531771
Filing Date: 2003-03-11
Classification: H01L

Abstract:
A combination assemblable into a circuit board arrangement having provision for heat dissipation, comprisinga circuit board having a plural bare silicon chips mounted thereon, the plural bare silicon chips each having an exposed face; a heat spreader spaced apart from the circuit board and having a substantially planar portion having inner and outer faces and being sized and shaped for attachment to the circuit board such that the inner face of the planar portion faces the side of the circuit board bearing the bare silicon chips; a gel composition on the inner face of the heat spreader, the gel composition having a cohesive strength greater than its adhesive strength, a compression modulus less than 1.38 MPa, and a thermal conductivity greater than 1.0 W/m-Â°C.; the gel composition forming at least one pad having a thickness between about 0.08 mm and about 1.0 mm; the at least one pad being positioned to contact and completely cover the exposed faces of the plural bare silicon chips when the heat spreader is attached to the circuit board.