Fellow technetters,
               Can someone help me to find out what's the maximum clearance
on all sides of pads for a HASL board on a 20 mil pitch QFP. We are having
bridging problems with this device and we are suspecting  of the solder
mask between the pads. Currently the PWB we are using shows 10 mils pads
followed by a clearance of 2.5 mils and then 5 mils of solder mask. Also
what is a normal thickness of the plating on a HASL board?



               Any information will be appreciated



Jorge A Rodriguez
Process Engineer
Conexant Systems Inc

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