Specifications

Independent Loading Mechanism (ILM)
20 Thermal/Mechanical Design Guide
3.1.2 ILM Back Plate Design Overview
The back plate for single processor workstation products consists of a flat steel back
plate with threaded studs for ILM attach. The threaded studs have a smooth surface
feature that provides alignment for the back plate to the motherboard for proper
assembly of the ILM around the socket. A clearance hole is located at the center of the
plate to allow access to test points and backside capacitors. An insulator is pre-applied.
3.2 Assembly of ILM to a Motherboard
The ILM design allows a bottoms up assembly of the components to the board. In
step 1, (see Figure 3-2), the back plate is placed in a fixture. Holes in the motherboard
provide alignment to the threaded studs. In step 2, the ILM cover assembly is placed
over the socket and threaded studs. Using a T20 Torx* driver fasten the ILM cover
assembly to the back plate with the four captive fasteners. Torque to 8 ± 2 inch-
pounds. The length of the threaded studs accommodate board thicknesses from
0.062” to 0.100”.
Figure 3-1. ILM Cover Assembly
Load Plate
Load Lever
Frame
Captive Fastener (4x)
Load Plate
Load Lever
Frame
Captive Fastener (4x)