Topic: Annular rings on oblong pads rules

Annular rings on oblong pads rules
Hello,

I would like to know what are the rules for oblong pads with PTH and NTPH holes.
Do you accept an OAR = 0 on the smallest side?

Best Regards,
Joel.
02/06/2015 09:16:30
Patron
Annular rings on oblong pads rules
Hi Joel

It should`nt be a problem to set the value = 0. But please keep in mind that we have to increase the drill for the production.
The attached picture shows you the result (exaggerated) before surfacing the board with HAL or Chem. Gold.

Have a look to our Drilltable, it shows the drillsizes for the drilling process:

http://www.pcb-specification.com/uk
tab: Drill chart table

If you have further questions, do not hesitate to ask our customer service.

Your PCB-POOL Service Team
Attachment
Oblong_Pads.jpg
02/06/2015 10:21:57
PCB-POOL (R)  Service Team
Answers