Data Sheet
Preliminary
PowerPC 970FX
5.7.3 Heatsink Attachment and Mounting Forces
Table 5-10 and Figure 5-4 describe the allowable forces for the PowerPC 970FX package. Heatsink design
should not exceed these static or dynamic forces.
Table 5-10. Allowable Forces on the PowerPC 970FX Package
Call
Out
Numb
er
1
Characteristic
Symbol
Maximum
Unit
Note
Static
F
F
133.5
133.5
0
N
N
N
N
N
N
C
C
1
2
Compressive force on chip
Dynamic
Static
F
F
T
T
Tensile force on chip
Dynamic
Static
17.6
90.3
113.0
F
F
BGA
BGA
3
Compressive force on BGA balls
2
Dynamic
Note:
1. One newton = 0.2248089 pound-force
2. The maximum force value for call-out item 3 must include the force value for call-out item 1.
(F + F < F
BGA
C(Static)
BGA(Static)
Figure 5-4. Force Diagram for the PowerPC 970FX Package
3
2
1
Note:
1. The legend for this figure is provided by call out number in Table 5-10 on page 71.
System Design Information
Page 71 of 74
October 14, 2005
IBM [ IBM ]
