IC package assembly with retention mechanism

An IC (Integrated Circuit) package assembly comprising:

• a PCB (Printed Circuit Board) having a plurality of contact pads on a top surface thereof;
• a socket mounted on the PCB, the socket receiving a plurality of contacts each having oppositely projecting contact portions;
• an IC package coupled to the socket and having a plurality of contact pads on a bottom surface thereof;
• a heat sink positioned on the IC package, the heat sink including a planar substrate and a plurality of heat dissipating fins upwardly extending from the substrate;
• and
• a retention mechanism for mechanically and electrically assembling the PCB, the socket, the IC package and the heat sink together, the retention mechanism comprising:
• a spring clip attached to a top surface of the substrate of the heat sink and disengaged from the heat dissipating fins, the spring clip having a pair of engaging legs and a biasing strip between the engaging legs substantially parallel with the substrate of the heat sink;
• and
• a lever having an actuation beam retentively seated on the top surface of the substrate of the heat sink beneath the biasing strip of the spring clip, the lever being rotatable from a vertical position where the actuation beam is disengaged from the biasing strip of the spring clip to a horizontal position where the actuation beam is engaged with the biasing strip of the spring clip;
• wherein, when the lever is rotated to the horizontal position to engage the actuation beam thereof with the biasing strip of the spring clip, the engaging legs of the spring clip are actuated to press against a bottom surface of the PCB, whereby a reliable electrical connection is established between the opposite contact portions of the contacts of the socket and corresponding contact pads of the IC package and the PCB.

A retention mechanism for mechanically and electrically assembling a PCB (Printed Circuit Board), a socket, an IC (Integrated Circuit) package and a heat sink which are arranged in order, the retention mechanism comprising:

• a spring clip for being attached to the heat sink, the spring clip having a pair of engaging legs and a biasing strip between the engaging legs, the biasing strip having a downwardly extending yoke and being connected with the engaging legs by a pair of bent portions;
• and
• a lever having an actuation beam adapted for being attached to the heat sink, the actuation beam having an arcuate section located beneath the biasing strip of the spring clip and a free end section extending through and vertically movable in the yoke of the spring clip, the lever being rotatable from a first position where the arcuate section is contained in a plane parallel with the biasing strip of the spring clip to a second position where the arcuate section is contained in a plane perpendicular to the biasing strip of the spring clip and engages with the biasing strip of the spring clip;
• wherein, when the lever is rotated to the second position to engage with the biasing strip of the spring clip, the biasing strip is biased upwardly to engage the engaging legs of the spring clip with a bottom surface of the PCB, whereby the heat sink, the IC package, the socket and the PCB are securely attached together and a reliable electrical connection is established between the IC package and the PCB via the socket.

A retention mechanism assembly comprising:

• a spring clip defining a pair of downwardly extending engaging legs with engaging toes thereof and a biasing strip between the engaging legs;
• a PCB (Printed Circuit Board) positioned under said spring clip with means for latchable engagement with said engaging toes of said engaging legs;
• a heat sink positioned between said PCB and the biasing strip, said heat sink having a substrate facing said PCB;
• and
• a lever moveably located around said spring clip and said heat sink, said lever including an actuation beam retained to and seated upon a top face of the substrate of said heat sink, and an actuation section which, when said lever is operated at a first position, said actuation section is spaced from a bottom face of said biasing strip so as to form a non-tension condition of the assembly with the engaging toes not latchably engaging the means of the PCB, and when said lever is operated at a second position, said actuation section is engaged with the bottom face of said biasing strip so as to form a tension condition of the assembly with the engaging toes latchably engaging the means of said PCB;
• wherein a latch of the lever rests on a catch of the spring clip when said lever is operated at the second position.