Figure 3-7. Offset between LGA Land Center and Solder Ball Center
Socket Mechanical Design
Intel
®
Xeon
®
Phi™ Processor x200 Product Family TMSDG
Order Number: 334785-002
28
3.3.3.2
Contact Load-Deflection Curve
The contact should be designed with appropriate spring rate and deflection range, as
illustrated by the blue curve in
to ensure adequate contact normal force in
order to meet BOL (upper boundary) and EOL (lower boundary) performance targets at
all contact locations. Minimum contact normal force should make the contact meet the
electrical requirements. The maximum contact normal force should meet the
specification in
. The LGA contact working range is defined as the difference of
contact deflection at the minimum contact load and the nominal contact deflection.