Electronics Forum | Mon May 14 12:44:08 EDT 2012 | tomgervascio
I am a user of an Ersa Versaflow 3/45. I was wondering if anyone could share some process pointers. I have a 0.125" multilayer PCB that I am having problems consistently achieving 75 percent hole fill on a mini-coax connector. The coax connector ha
Electronics Forum | Wed Dec 10 00:15:07 EST 2008 | jeffjarmato
Are there any good solutions for getting good barrel fill on PTH boards using Pb Free solder and No Clean flux. All of our boards are having issues getting minimum required fill per IPC. It does not matter if the board is 062 or thicker, any pin conn
Electronics Forum | Wed Dec 10 16:15:24 EST 2008 | terryl
on the front end in design, minimize the pth connections to ground planes. this takes alot of work by the pcb designer and the approval of the design engineer. connect maximum of 4 ground planes to pth, minimum 1 plane. use spoked connections. ev
Electronics Forum | Wed Dec 10 09:29:59 EST 2008 | rgduval
Oops...just noticed you were referring to wave soldering. We'd still suggest a water-soluble flux, instead of the no-clean; especially at wave soldering. Also, checking pre-heat temps, and dwell time on the pot. Is the wave a chipper wave? If not
Electronics Forum | Thu Nov 22 23:46:27 EST 2018 | jaypark
Some PTHs on a board in the product I am building are not filled enough to meet the IPC-610-F requirement(at least 75% vertical fill) . I have no access to the solder source side due to something installed right beneath it. In order to completely
Electronics Forum | Mon Nov 26 09:33:49 EST 2018 | charliedci
The problem you create by soldering from solder destination side (presuming you have already soldered from other side) is that you will trap air in PTH so you have virtually no continuous solder in PTH from one side to other. This will not meet IPC-A
Electronics Forum | Thu Nov 29 22:51:18 EST 2018 | jandon
IPC J-STD-001F: 6.2.1 Solder Application: Solder shall (N1D1D3) only be applied to the one side of a PTH except for intrusive soldering. Heat may be simultaneously applied to the both sides of the PTH.
Electronics Forum | Wed Oct 12 12:33:11 EDT 2005 | Inds
Hi Everyone, I am trying to site dress PTH holes filled with Nihon solder mixed with SAC solder at the rework station. But what i am seeing is the solder just doesn't melt and I am not able to suck the solder out of the PTH. Has anyone faced this i
Electronics Forum | Sun Aug 19 15:34:20 EDT 2007 | davef
What are you trying to do: * Improve hole fill? * Reduce PTH voiding? Hole fill: Search the fine SMTnet Archives for stuff like: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=36063 PTH voiding: Ideally, there are no voids. We're unawar
Electronics Forum | Fri Jul 19 13:09:55 EDT 2019 | edhare
Hi, Are you referring to the condition illustrated here? ... https://www.semlab.com/qfn-solder-fillets In this case, the solder was wicked down an attached un-filled PTH via. Ed Hare SEM Lab, Inc.
