R
mPGA604 Socket 27
Mechanical Design Guide
5 Environmental Requirements Design, including materials, shall be consistent with the manufacture of units that meet the
following environmental reference points.
The reliability targets in this section are based on the expected field use environment for a desktop
product. The test sequence for new sockets will be developed using the knowledge-based reliability
evaluation methodology, which is acceleration factor dependent. A simplified process flow of this
methodology can be seen in Figure 5-1.
Figure 5-1. Flow Chart of Knowledge-Based Reliability Evaluation Methodology
A detailed description of this methodology can be found at:
http://developer.intel.com/design/packtech/245162.htm.
The use environment expectations assumed are for desktop processors, based on an expected life of
7 years, are listed in Table 5-1. The target failure rates are <1% at 7 years (and <3% at 10 years).
Table 5-1. Use Conditions Environment
Speculative Stress Condition 7 Year Life Expectation
Temperature Cycle 1500 cycles with a mean ΔT = 40OC
THB / HAST 62,000 hrs at 30°C, 85%RH
BAKE 62,000 hrs at 100°C
Power Cycle 7,500 cycles
For additional information on mechanical shock and vibration testing conditions, refer to the
Thermal Mechanical Design Guidelines.