Intel E2180 Design Guide - Page 94
IHS Groove at 6 o'clock Exit on the 775-LAND LGA Package, 15. IHS Groove at 6 o'clock
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Page 94 highlights
Case Temperature Reference Metrology The orientation of the groove at 6 o'clock exit relative to the package pin 1 indicator (gold triangle in one corner of the package) is shown in Figure 7-14 for the 775-Land LGA package IHS. Figure 7-14. IHS Groove at 6 o'clock Exit on the 775-LAND LGA Package IHS Groove Pin1 indicator When the processor is installed in the LGA775 socket, the groove is parallel to the socket load lever, and is toward the IHS notch as shown Figure 7-15. Figure 7-15. IHS Groove at 6 o'clock Exit Orientation Relative to the LGA775 Socket Select a machine shop that is capable of holding drawing specified tolerances. IHS groove geometry is critical for repeatable placement of the thermocouple bead, ensuring precise thermal measurements. The specified dimensions minimize the impact of the groove on the IHS under the socket load. A larger groove may cause the IHS to warp under the socket load such that it does not represent the performance of an ungrooved IHS on production packages. Inspect parts for compliance to specifications before accepting from machine shop. 94 Thermal and Mechanical Design Guidelines