Ironwood Electronics SS-BGA User Manual - Manual (Page 6)

SSI.doc, Rev. A, IP
Rev. B/C/D, RP
Rev. E, VP
5
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www.ironwoodelectronics.com
Backing and insulation Plate
For all IC body sizes, spring pin sockets require a rigid metal backing plate to prevent deflection of the
target circuit board due to a high normal force required to compress the spring pins. If the backside of the
target PCB contains capacitors and resistors, a custom insulation plate with cavities cut for those
components can be designed. This insulation plate sandwiches between the backing plate and target PCB
as shown in figure 4. Figure 5 shows an example of a custom insulation plate.
36.00mm
36.00mm
2.09mm
2.09mm
5.080mm±0.025mm
31
.8
2
5
m
m
±0
.0
2
5
m
m
(x
4
)
2.540mm±0.025mm
1.59mm±0.18mm
Ø 1.59mm (x4)
Ø 0.79mm (x2)
Side View
Top View
Top view
(with component layout
reference only)
Figure 5: Insulation Plate example drawing