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Weight of the package

Mesh Density vs. Restoring Force

Pad radius : 0.315 mm

g : 35 dynes/mm

Solder Ball Volume : 0.2726 mm3

Standoff Height : 0.53862 mm

Example:

(1) 18 dynes/solder, for 352 solder ball PBGA

==> Total restoring forces = 18 * 352 = 6336 dynes

= 6.47 grams

(2) 7.8 dynes/solder, for 352 PBGA

==> Total restoring forces = 7.8 * 352 = 2,746 dynes

= 2.8 grams