I wonder if some experts could refresh my memory on some PCB tolerances assuming materials and processes
suitable for very high volume commercial quality PCB's.

Imagine I have a rectangular board about 50 X 100 mm (2"X4") with four fixing holes - one in each corner
and a set of pads somewhere in the middle of the board. Here's the features I'd like tols on:

The tolerance on the fixing hole diameter.

The tolerance on the position of the pad pattern to the fixing hole.

The tolerance between individual pads in the pattern - assume each pad is 1mm wide by 2mm long.


Thanks,


--
Eric Christison
Mechanical Engineer
STMicroelectronics
33 Pinkhill
Edinburgh
EH12 7BF

Tel: (0)131 336 6165
Fax: (0)131 336 6001

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