Fellow Technetters:

        Could anyone recommend land pattern size, via size / configuration,
and mask size / configuration for a 357 full matrix 1.27 mm pitch PBGA?

        I am thinking of using a "dog-bone" pad/via configuration with
0.025" pad diameter and 0.030" mask opening. Pad to via distance of 0.035"
(centres).  Via pad diameter of 0.024" and 0.017" mask opening.

        Is this reasonable?  Any recommendations?

Thanks,

Ernst Wallisch
Manufacturing Engineering
Computing Devices Canada
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