Reference Thermal Solution
28
Intel
®
E7230 Chipset Memory Controller Hub (MCH)
Thermal/Mechanical Design Guide
6.5.6
Clip Retention Anchors
For Intel E7230 chipset-based platforms that have very limited board space, a clip retention anchor
has been developed to minimize the impact of clip retention on the board. It is based on a standard
two-pin jumper and is soldered to the board like any common through-hole header. A new anchor
design is available with 45° bent leads to increase the anchor attach reliability over time. See
Appendix A
for the part number and supplier information.
6.6
Reliability Guidelines
Each motherboard, heatsink and attach combination may vary the mechanical loading of the
component. Based on the end user environment, the user should define the appropriate reliability
test criteria and carefully evaluate the completed assembly prior to use in high volume. Some
general recommendations are shown in
Table 6-2
.
NOTES:
1. It is recommended that the above tests be performed on a sample size of at least twelve assemblies from
three lots of material.
2. Additional pass/fail criteria may be added at the discretion of the user.
§
Table 6-2. Reliability Guidelines
Test
(1)
Requirement
Pass/Fail Criteria
(2)
Mechanical Shock
50 g, board level, 11 msec, 3 shocks/axis
Visual Check and Electrical
Functional Test
Random Vibration
7.3 g, board level, 45 min/axis, 50 Hz to 2000 Hz
Visual Check and Electrical
Functional Test
Temperature Life
85°C, 2000 hours total, checkpoints at 168, 500,
1000, and 2000 hours
Visual Check
Thermal Cycling
–5°C to +70°C, 500 cycles
Visual Check
Humidity
85% relative humidity, 55°C, 1000 hours
Visual Check
