Independent Loading Mechanism (ILM)
30
Thermal/Mechanical Specifications and Design Guidelines
When closed, the load plate applies two point loads onto the IHS at the “dimpled”
features shown in
. The reaction force from closing the load plate is
transmitted to the hinge frame assembly and through the fasteners to the back plate.
Some of the load is passed through the socket body to the board inducing a slight
compression on the solder joints.
A pin 1 indicator will be marked on the ILM cover assembly.
4.1.2
ILM Back Plate Design Overview
The back plate (see
) is a flat steel back plate with pierced and extruded
features for ILM attach. A clearance hole is located at the center of the plate to allow
access to test points and backside capacitors if required. An insulator is pre-applied. A
notch is placed in one corner to assist in orienting the back plate during assembly.
Note:
The Server ILM back plate is different from the Desktop design. Since Server
secondary-side clearance of 3.0 mm[0.118 inch] is generally available for leads and
backside components, so Server ILM back plate is designed with 1.8 mm thickness and
2.2 mm entire height including punch protrusion length.
Figure 4-1. ILM Cover Assembly
Fasteners
Load
Lever
Load
Plate
Hinge /
Frame
Assy
Shoulder Screw
Pin 1 Indicator
Fasteners
Load
Lever
Load
Plate
Hinge /
Frame
Assy
Shoulder Screw
Pin 1 Indicator
Figure 4-2. Back Plate
Die Cut
Insulator
Pierced & Extruded
Thread Features
Assembly
Orientation
Feature
Die Cut
Insulator
Pierced & Extruded
Thread Features
Assembly
Orientation
Feature
Summary of Contents for BX80605X3440 - Quad Core Xeon X3440
Page 10: ...Introduction 12 Thermal Mechanical Specifications and Design Guidelines...
Page 26: ...LGA1156 Socket 28 Thermal Mechanical Specifications and Design Guidelines...
Page 78: ...Component Suppliers 78...
Page 80: ...Mechanical Drawings 80 Figure B 1 Socket Heatsink ILM Keepout Zone Primary Side for 1U Top...
Page 87: ...87 Mechanical Drawings Figure B 8 Heatsink Compression Spring...
Page 88: ...Mechanical Drawings 88 Figure B 9 Heatsink Load Cup...
Page 89: ...89 Mechanical Drawings Figure B 10 Heatsink Retaining Ring...
Page 91: ...91 Mechanical Drawings Figure B 12 Heatsink Backplate...
Page 92: ...Mechanical Drawings 92 Figure B 13 Heatsink Backplate Insulator...
Page 102: ...Socket Mechanical Drawings 104 Thermal Mechanical Specifications and Design Guidelines...
Page 106: ...Package Mechanical Drawings 108 Thermal Mechanical Specifications and Design Guidelines...
