Patent ID: 6243263
Filing Date: 2001-06-05
Classification: H01L

Abstract:
A heat radiation device for a thin electronic apparatus, comprising:a rectangular plate-shaped base comprising a material having high heat conductivity;a rectangular intermediate plate formed from a material having high heat conductivity and stacked on said base;a rectangular box-shaped cover stacked on said intermediate plate; anda fan,wherein said base comprises a depression having a short cylindrical shape at a center portion of said base, a plurality of parallel fins projecting from a bottom portion of said base along a first longer side thereof such that said fins extend in a direction perpendicular to the first longer side, said intermediate plate and said plurality of parallel fins forming a second ventilation port, and a communication portion having an arcuate shape as projected on a plane connecting said depression and said second ventilation port,said intermediate plate comprises a circular opening at a position corresponding to that of said depression, and said fan is attached to said intermediate plate such that said fan is at a position of the circular opening,said intermediate plate and said base are connected together such that heat can be conducted therebetween,said cover comprises downwardly projecting side plates respectively provided at each longer side of said cover, a surface of respective side plates abutting said intermediate plate and/or said base forming a first ventilation port for cooling air at a shorter side of said cover, and forming a passage for cooling air between said cover and said intermediate plate, andwherein operation of said fan causes cooling air to flow between said first and second ventilation ports, so that heat accumulated within said base is radiated to the outside.