Hi,
These questions are directed primarily at the PCB fabrication
professionals out there, but any input is welcome.
What is the standard location tolerance for a first stage drilled hole,
(unplated)?
What is the standard location tolerance for a second stage drilled hole
(unplated)?
Lets assume IPC Class 2.
I tried looking through IPC 6012 and IPC-2221 but cold not find any
indication of what first stage drilled holes or second stage drilled
holes.
Where can I find any industry documentation used by the PCB fabricators to
identify this information?
Thank you in advance.
Tom Burek, CID+
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