Electronics Forum: shall (Page 1 of 22)

Re: PCB fab supplier supplier/evaluation

Electronics Forum | Sun Aug 08 11:15:32 EDT 1999 | Earl Moon

| | Mike, | | | | Got your message and those of others concerning PCB fab supplier evaluation and qualification check lists, etc. I have a severe problem here in WI as I can hardly access the internet, and when I do it is cut off abruptly for no goo

IPC J STD 004B Reliability tests

Electronics Forum | Mon Dec 20 10:20:14 EST 2010 | 18424

Test Resistance to ECM shall be 65C +- 2C @ 88.5% +- 3.5% All SIR Measurements shall not exceed 100 MOhm. I am not sure of voltage.

How to Differentiate Class 3 and Class 2 products in terms of process

Electronics Forum | Sat Jan 10 05:55:13 EST 2015 | jandon

Rework is acceptable in class 3 but hardware defects shall be documented before rework and rework shall be documented.

Re: Qualifying new PWB Vendors

Electronics Forum | Sat Jan 16 02:43:21 EST 1999 | Earl Moon

| Hello, | | We are qualifying new sources of PWB vendors. We've got the first lot of "produciton" boards in and we want to put them through the paces before turing the vendors on. | | So far, the tests I can think of performing, and that we have

Conformal Coating Coverage on Side of IC

Electronics Forum | Mon Sep 21 20:45:55 EDT 2009 | davef

10.4. Pre-Cure Examination. Immediately after material application, the uncured conformal coating shall be examined for: a. Bubbles and Air Entrapments. These defects shall be broken by vacuum, with a sharp probe, or other appropriate tools. b. Bridg

Implementing AOI

Electronics Forum | Wed Mar 03 14:16:59 EST 2010 | davef

First, we expect that your equipment supplier would help you with this. Then again with lots of used equipment flying around, some of the basic stuff often gets pushed to the back of the bus. Second, here is a clip and paste on the basics of equipm

Re: Conductor width tolerances

Electronics Forum | Tue Nov 09 11:32:32 EST 1999 | Dave F

Wolfgang: "Our desire is to get what we design" ... Wanting to get what you ask for ... ummm sounds like a risky proposition!!! ;-) Two things: 1 Go to the Hadco site and get their "boiler-plate." Use it and some of the Earl Moon specs in the SMTn

Registration scam

Electronics Forum | Fri Apr 16 07:34:22 EDT 1999 | Brian Ellis

Hi! I shall not register. I consider that you are being too nosy, by half, with the questions you ask (even if some of them are not required). I shall mention this in a future Internet Commentary in Circuit World. If registration is deemed necessary

Measure humidity for PCB

Electronics Forum | Tue Apr 13 14:49:15 EDT 2010 | davef

90%) from the sample, and the bake time and temperature specified herein are minimums. To improve test accuracy, or to prevent heat damage, other bake parameters may be AABUS. 2 Applicable Documents IPC-QL-653 Certification of Facilities that Inspect

Re: Starting an SMT line

Electronics Forum | Mon Sep 07 02:10:37 EDT 1998 | Tom Blum

Hi Dick We've built up an SMD line for low volume, high product mix over the last two years. Some thoughts: - the reflow system shall have very big thermal power and reserve that results in the same profil with different thermal masses ie products. T

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