Electronics Forum | Tue Dec 26 10:54:37 EST 2006 | yusufgomec
We use hot air leveling (HAL) process in pcb production. HAL process is 3 steps. �n 1. step flux. 2. step is HAL. And 3. step is rinsing. As you know there is mustn't any flux after rinsing operation. Our flux chemical is water soluable. But there ar
Electronics Forum | Fri Nov 15 11:12:15 EST 2002 | V.RAMANAND KINI
I have tried this white s/m coating. I want some thing better. I am looking at a metal frame cover over the PCB or leave the PCB surface with HAL avoiding soldermask. Will this HAL withstand -40 to +85 deg?
Electronics Forum | Mon Sep 17 02:56:40 EDT 2001 | mugen
Hi, (me been absent for some time...) Are your brds confirmed HAL over copper? (check out what Dave F mentioned abt possible root causes) or are the brds HAL over nickle? (shd be no problem here, if so?) or are the brds strictly nickle plated pads?
Electronics Forum | Fri May 23 04:22:39 EDT 2014 | andrzej
Thanks Hege. I've done some research and this might be the root couse: 1. Too thin HAL layer which leads to formation intermetallic Cu-Sn layers on surface after 1-st reflow (most probably) 2. Poor quality of solder for HAL process. 3. Problem
Electronics Forum | Sun Apr 13 19:55:21 EDT 2003 | yukim
Just some more info: PCB is HAL finished we are using Sn63 solder paste.
Electronics Forum | Tue Dec 26 20:11:47 EST 2006 | davef
What is the make-up of the residue? Is finding this residue new to your standard operation? What has changed?
Electronics Forum | Wed Jan 17 10:01:49 EST 2007 | lyetc
Hi...have you try ultrasonic cleaning before rinsing?
Electronics Forum | Tue Jun 21 15:45:20 EDT 2022 | vopashainc
No. They are not using any dross reducer. I
Electronics Forum | Tue Jun 21 18:00:26 EDT 2022 | proceng1
I received an email from the OP and I will not be connecting on WHATSAPP.
Electronics Forum | Sat Jun 25 06:55:41 EDT 2022 | vopashainc
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