Hello,
      on our new design we are going to use fine pitch 15.7 mils component.
Pads are 8x50 rectangular.

My concerns are:
 
Is it advisable to use solder mask. Web would be 2.7 mils?
On of our manufactures said they can't make web smaller than 3 mils.

Are you making paste mask as wide as the pad?

Did you have problems with shorts or not enough solder?

Thanks for all inputs

Mirka Halas

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