Electronics Forum | Wed Jul 07 00:28:59 EDT 1999 | Scott Cook
| Q #1) Is it more reliable to have the mask tent over the vias or risk getting vias half filled with solder? These are vias with an .020" hole and .040" or .050" pad. John, It depends......mainly on the via size. Tenting works on smaller vias. Tent
Electronics Forum | Fri Nov 13 23:33:33 EST 1998 | Kallol Chakraborty
| | | I believe that gold fingers on my circuit boards are being | | | contaminated and need to clean them with some chemical | | | solution. Any recommendations. | | | | | Chuck: What is the type and source of your contamination? Dave F | | We a
Electronics Forum | Mon Aug 17 03:05:59 EDT 1998 | Bob Willis
| | Where can I find a spec to put on my fab drawing, to call out the cleanliness of the board, before I recieve it. These boards will require a tight spec after they are assembled, so I want to know that they are clean when I get them. Any suggestio
Electronics Forum | Mon Jul 05 03:44:53 EDT 2004 | johnwnz
Dave, I'm going to disagree with you on the ENIG, it's my 3rd choice only just beating out OSP for that 4th spot. 1. Immersion Silver - cheaper than ENIG, as flat and no issues with Brittle interface (black pad) or Gold Embrittlement) Longer shelf l
Electronics Forum | Fri Sep 05 09:15:36 EDT 2014 | rgduval
Hi, Edri, It's not uncommon for PCB fab houses to change pad sizes like that, due to design constraints....however, it always aggravates me when they do it without checking with me first. In my mind, that's the first sign of potential bad issues wi
Electronics Forum | Fri Jun 04 15:51:36 EDT 1999 | JohnW
| | | I'm encountering a new problem at my new company that I haven't encountered before in my past life - and that's Wave Soldering VIA holes. | | | | | | We've been getting a rash of defects that we call in this company, "insufficient solder in VI
Electronics Forum | Tue Jun 08 11:54:17 EDT 1999 | Steve Skinner
| | | I'm encountering a new problem at my new company that I haven't encountered before in my past life - and that's Wave Soldering VIA holes. | | | | | | We've been getting a rash of defects that we call in this company, "insufficient solder in VI
Electronics Forum | Wed Oct 03 23:59:44 EDT 2018 | gaintstar
Flason SMT problem solving: http://www.flason-smt.com/new/PRINCIPLE-OF-SURFACE-MOUNT-PROCESS-SMT-PROCESS.html http://www.flason-smt.com/new/Printed-Circuit-Board-PCB-Price-Estimator.html http://www.flason-smt.com/new/Printed-Circuit-Board-Solder-res
Electronics Forum | Wed Jun 02 15:05:59 EDT 1999 | JohnW
| To you all for comment and summary, | | The following things I like without endorsing (PCB/PCBA stuff - outside the great women in my life [many] and without [mostly]): | | 1) A good set of design rules | 2) A good set of design rules meeting pro
Electronics Forum | Wed May 27 15:54:09 EDT 1998 | Chrys
| | | | | We recently made the switch to no-clean and the wurface mount is turning out beautifully. However, the wave solder process continues to put up a fight; we are getting a white residue on the surface of the PCB. The residue is not loca
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