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Board Stretch...Is there a relevant IPC spec?

Electronics Forum | Wed Aug 22 21:22:05 EDT 2001 | davef

First place to look is IPC-6012A w A#1 "Qualification & Performance For Rigid Printed Boards". I'll look at it later to see what's there.

Testing of Manufactured PCB's

Electronics Forum | Wed Oct 17 17:44:49 EDT 2001 | davef

What you do is reasonable. Some of these and other tests are covered in: * IPC-6011 - Generic Performance Specification For Printed Boards * IPC-6012A w A#1 - Qualification & Performance For Rigid Printed Boards

Board Stretch...Is there a relevant IPC spec?

Electronics Forum | Thu Aug 23 12:23:51 EDT 2001 | mkallen

I don't see anything in IPC-6012A specifically about stretch. Maybe paragraph 3.4 (Board Dimensional Requirements) applies, which tells me I need my own drawing note. Crafting this note could be tricky, and I was hoping that someone has already tac

Best/Common Practice in Blank PCB QC

Electronics Forum | Fri Feb 28 09:52:47 EST 2003 | ksfacinelli

One easy and often over looked step is to call out IPC-6012A compliance on the PO. You will also need to call out the class status. If you get in an issue regarding quality you will have a resource to fall back on. Sounds simple but ask your buyers

Soldermask thickness

Electronics Forum | Thu Oct 02 17:54:46 EDT 2003 | davef

Yes, Russ IPC-6012A w A#1 - Qualification & Performance For Rigid Printed Boards talks to solder mask requirements in 3.8. One interpretation of what it says: * Solder resist [solder mask] must meet the qualification / conformance requirements of S

Would YOU except this PCB ???

Electronics Forum | Fri Aug 15 00:51:30 EDT 2008 | boardhouse

Hi Paul, My discloser, I sell for an offshore house, this is Crap.... Section 3.4.3 Annular Ring (External) of IPC-6012A, which also calls out Table 3-5, states that "Plated-through holes identified as vias can have up to 90 degrees breakout of t

Leakage resistance in PCB

Electronics Forum | Mon Feb 04 20:27:25 EST 2002 | davef

1,000 G ohm ||100 M ohm Dielectric Constant ||9.5 ||4.9 Loss Factor ||5 - 20 ||200 * E indicates exponent Continuing: * Spacing between same plane traces effect the electical parameters between the traces. * Dielectric materials used between diff

IPC Spec for PTH Hole Size Tolerance

Electronics Forum | Wed Apr 10 22:23:48 EDT 2002 | davef

IPC-6012A, 3.4.1 has words to the effect of: Hole size tolerance and hole pattern accuracy shall be as specified in the procurement documentation. Our fab says: Standard Drill Sizes Drill Number ||Hole Size ||Finished Hole Size 70 ||0.028" ||0.02

IPC Spec for PTH Hole Size Tolerance

Electronics Forum | Wed Apr 10 22:24:30 EDT 2002 | davef

IPC-6012A, 3.4.1 has words to the effect of: Hole size tolerance and hole pattern accuracy shall be as specified in the procurement documentation. Our fab says: Standard Drill Sizes Drill Number ||Hole Size ||Finished Hole Size 70 ||0.028" ||0.02

Track Repairs

Electronics Forum | Sun Nov 30 08:53:15 EST 2003 | davef

IPC-6012A finds "circuit repairs" as acceptable in Class 1, 2, and 3 only "As agreed by user and supplier." So, it is your call, basically. Generally these repairs, if done properly, are reliable. See IPC-7721, 5.2.3, for conductor repair by welding


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