Patent ID: 6646881
Filing Date: 2003-11-11
Classification: H01L,Y10T

Abstract:
A mounting assembly for attaching a heat sink to an electronic package on a circuit board, the mounting assembly comprising:a back plate comprising a main body, a first post extending from the main body adapted for extending through the circuit board and the heat sink, and an opposite second post extending from the main body adapted for extending through the circuit board and the heat sink, the first post defining an annular groove in an upper portion thereof, the second post having a fastening portion; a clip comprising a main portion adapted for pressing the heat sink onto the electronic package, and first and second legs extending from the main portion, the first leg defining a guiding hole and a positioning slot in communication with the guiding hole, the second leg defining a fastening slot; and a fastening member engaging with the fastening portion of the back plate and sandwiching the second leg of the clip therebetween, wherein the first post of the back plate is extendable through the guiding hole to engage in the positioning slot of the clip.