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Date: | Thu, 21 Apr 2011 15:36:15 -0400 |
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I have a question about aqueous wash. There is a difference of opinion
on what IPC REQUIRES as far as wash water. The main issue is does IPC
specifications REQUIRE or PREFER/RECOMMEND DI water for aqueous wash?
IPC-AC-62A I don't think is clear. The spec in section 10.6 states:
"Rinse Water Parameter: Good quality deionized water is the
preferred rinse medium. However, this is not meant to suggest that
ultapure, 18.2 megohm-cm water is necessary. Water in the 1 to 5
megohm-cm region will be satisfactory for most operations"
The same spec in section 13.3 states:
"Final Rinse: This cleaning step is where the board is subject to
purified DI water rinse."
The PCBA print basically calls out build to IPC-610 class 2 and does not
call out any specific cleaning specifications. So, with all that said,
Is it an IPC REQUIREMENT to use DI water for aqueous wash? Thank you.
Best Regards,
Michael Forrester
Sr. Product Engineer
CSMTPE
Siemens Healthcare Diagnostics
101 Silvermine Rd.
Brookfield, CT 06804
PH: (203) 740-6452
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