Electronics Forum: how to troubleshoot oxide pcb pad (Page 1 of 6)

how to learn PCB design

Electronics Forum | Mon Jan 21 06:58:41 EST 2019 | kiransahu

Without PCB layout, not much would get done. It is a ubiquitous need across industries; Industrial, consumer, military...Everywhere you look, there are chips soldered to PCBs to create a final product for the end customer. But where did we all learn

Water Residue Stains - how to remove?

Electronics Forum | Wed Dec 19 02:24:40 EST 2001 | ianchan

Did I mention, we tried to use the same WS flux formulae to brush-cover the affected flex-PCB pads, and subject it to another round of water-wash, followed by oven-baking, and it still doesn't help abit? Oven bake : 100 deg-C, approx 15~30mins (manu

Water Residue Stains - how to remove?

Electronics Forum | Wed Dec 19 01:17:13 EST 2001 | ianchan

Hi Experts, I need help here, advice appreciated from all... Production is running a Lot of flex-circuit PCB, through the SMT line, with 0402 components. The flex-PCB is taped to FR4 support "pallets" when processing thru' the SMT P&P m/c. We use

Floor life pcb assembly

Electronics Forum | Wed Apr 23 19:00:39 EDT 2008 | stevek

It depends on the laminate but a PWB is like any other MSL component. Some fab shops are only waranting standard FR4 laminates for 45-60 days when processed at lead free temperatures. The best thing I can say is to try some weight gain/loss experim

how to protect pads while applying solvent green mask? cure?

Electronics Forum | Wed Jun 18 07:49:06 EDT 2008 | more_sunshine

hi i'm not experienced in creating pcbs but i have good background, and i have a bunch of questions. i have no access to world wide known pcb chemicals but i managed to get a cramolin positiv spray and i don't know if it is still usable or not? (di

Re: how to overcome tolerance in automatic alignment

Electronics Forum | Thu Sep 09 09:13:10 EDT 1999 | Scott Cook

| hi, i m college student. i m currently doing my Final year project in PCB drilling. the main task is to design auto feeder which allign the PCB properly in position before drilling take place. the close tolerance becomes a big problem to the precis

Re: how to overcome tolerance in automatic alignment

Electronics Forum | Fri Sep 10 09:03:52 EDT 1999 | ScottM

| | hi, i m college student. i m currently doing my Final year project in PCB drilling. the main task is to design auto feeder which allign the PCB properly in position before drilling take place. the close tolerance becomes a big problem to the prec

how to prenvent flux risidue in the blind vias.

Electronics Forum | Mon Feb 19 22:56:20 EST 2007 | davef

Russ We agree with your comments on plugging from one side only. But... We believe that it IS possible to trap process chemicals [technically, not flux] in a blind [or any other] via. This can be done by plating the via closed, rather than pluggi

Re: how to overcome tolerance in automatic alignment

Electronics Forum | Sun Sep 12 08:20:04 EDT 1999 | se

| | | | hi, i m college student. i m currently doing my Final year project in PCB drilling. the main task is to design auto feeder which allign the PCB properly in position before drilling take place. the close tolerance becomes a big problem to the

Re: how to overcome tolerance in automatic alignment

Electronics Forum | Fri Sep 10 12:09:02 EDT 1999 | Earl Moon

| | | hi, i m college student. i m currently doing my Final year project in PCB drilling. the main task is to design auto feeder which allign the PCB properly in position before drilling take place. the close tolerance becomes a big problem to the pr

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