Intel Pentium 4 Processor In the 423-pin Package Thermal Design Guidelines

Pentium® 4 processor in the 423-pin package Thermal Design Guidelines
12
Figure 3. Heat Sink Base Dimensions
NOTES
4 ALL DISPLAYED DIMENSIONS ARE CRITICAL TO
FUNCTION.
5 THE FIN STRUCTURE ASSEMBLED TO THE TOP
SURFACE OF THE BASE MAY NOT INTRUDE ON
ZONE A.
6 DATUM A IS DEFINED AS THE BOTTOM OF
THE PART.
7 THIS THICKNESS MUST BE MAINTAINED
BETWEEN ZONE A AND DATUM A .
8 FLATNESS ZONE B IS REQUIRED FOR
PROCESSOR REFERENCING AND THERMAL
INTERFACE APPLICATION.
9 LETTERS ATTACHED TO DIMENSIONS ARE FOR
CRITICAL TO FUNCTION DIMENSION
TRACKING.
11 SLOT DOES NOT HAVE TO TRAVERSE ENTIRE
2.500” LENGTH. IT MAY BE LOCALIZED,
CENTERED ON DATUM B , 1.000” IN LENGTH.
TOP VIEW
SIDE VIEW
BOTTOM VIEW