Electronics Forum | Wed Jul 23 03:04:57 EDT 2008 | gfro
Hello, We are using a PCB with thickness 3.2mm 4 layer and lot of through hole via's of diameter 0.4mm. We specified our PCB vendor to do plugging. Now we have big problems, that after 1..4 weeks we measure a low resistance between track's/via's of
Electronics Forum | Wed Jul 23 08:18:29 EDT 2008 | davef
Q1. Is this a standard process for plugging? A1. Not as such. We checked both IPC-6012 and IPC-SM-840. Neither comments on plugging. So, your fabrication notes rule the day. Q2. Is this okay for such thick PCB's or is it mandatory to use a special pl
Electronics Forum | Wed Jan 18 12:41:19 EST 2017 | emeto
Does anyone knows where I can buy these rubber cones? They work as masking - preventing the solder to adhere to through holes(rings) while wave soldering
Electronics Forum | Thu May 09 00:08:01 EDT 2002 | techment
Could someone provide help regarding IPC's recommendation on Plated Through hole's --- lead to hole ratio. I can't find it in IPC-2221 and IPC-SM-782. Thank you very much
Electronics Forum | Thu May 09 17:24:11 EDT 2002 | davef
First, SM-782 elates to surface mount pads. So, expecting to find PTH design rules there is a bit of a stretch. Search the fine SMTnet Archives for similar threads. For instance here�s one from last week: http://www.smtnet.com//forums/index.cfm?fu
Electronics Forum | Tue Jul 06 15:06:35 EDT 1999 | Mike Demos
Is anyone aware of some guidelines regarding through-hole in SMT pads? One of our designers wants to add through-hole leads in some SMT pads for an inductor. The size of the hole is 0.032 inches and takes-up approximately 25% of the pad area. This
Electronics Forum | Mon Mar 13 06:11:08 EST 2006 | Rob
Surely this is a job for Wavemaster Larry? Have you tried flux buster pins in your ICT yet? They are quite good at cutting through the crap on a board.
Electronics Forum | Tue Mar 07 08:48:55 EST 2006 | samir
Our ICT Guy here at my company loves to use lots of via holes as test points - via holes which are 0.040" diameter, and spaced at 0.004" edge to edge spacing! He doesn't like to tent the via's either, so I always battle via-to-via shorts at the wave
Electronics Forum | Tue Mar 07 21:35:16 EST 2006 | Cal Kolokoy
Samir, From experience, the only board test situation where tented via's have difficulty with contact is with a Flying Probe type tester. Otherwise, for traditional ICT, the force of the pogo pins, correct probe type, and fixture design should do th
Electronics Forum | Mon Sep 09 16:29:56 EDT 2013 | gregp
Hi Everyone, I'm looking for some feedback about through hole assembly requirements today vs. yesteryear. As I see it, there are two main categories...legacy through hole and new through hole with mixed technology. The legacy stuff is older designs
