Fixing element and heat dissipation unit using same

Abstract

A heat dissipation unit includes a main body and a plurality of fixing elements. The main body has a heat receiving zone and a plurality of through holes formed at four corners outside the heat receiving zone. The fixing elements are mounted in the through holes and respectively include a screw having a spring fitted thereon; a sleeve disposed outside the screw and the spring and having a pair of windows formed near an upper end; and a spring retaining ring fitted around the sleeve and having a pair of upward extended hooked arms extended through the windows to compress the spring in the sleeve. When the fixing elements have been assembled to the main body, the springs can be released at the same time and can therefore apply even downward forces synchronously for the main body to closely and evenly contact with a bare die heat source.