Electronics Forum | Tue Jan 20 08:38:37 EST 2009 | davef
MrDif: You don't add fresh paste to used paste? We add fresh paste to used paste on the stencil to replenish the paste consumed while printing boards, so that we maintain a nice thumb-size roll of paste. We change the used paste when we clean the ste
Electronics Forum | Thu Mar 25 11:30:33 EDT 2010 | Sean
Hello Rajeshwara, If not mistaken, the 25% solder void specification is for BGA...As I I as know, no specification given to mosfet component yet..I think you are right, I need to look at the stencil aperture in order to reduce the air trap underneat
Electronics Forum | Wed Dec 08 09:53:23 EST 2010 | fönsi
Hello Because of the cold weather, we had some troubles with drying out of printed solder paste on the pcb's. The relative humidity in the air declined below of 20%. We have a process window of store the printed board for maximum 24 hours, but with
Electronics Forum | Tue Dec 21 17:56:13 EST 2010 | stepheniii
Am I reading your post correctly? You will print PCBs and not populate them until up to 24 hours later? And you can assemble level 3 components at 30C and 90% humidity, you just have to pro-rate the exposure time. (I don't recommend having those con
Electronics Forum | Sun Mar 20 14:47:29 EDT 2011 | floydf
We are going to be placing BGAs for the first time, and I have some questions. Is it recommended top bake all of the boards and all of the BGAs before production? I have had good luck baking boards that didn't wave solder well. It usually turns out
Electronics Forum | Wed Jul 30 07:41:08 EDT 2014 | williamaxler
I have seen similar issues in the past. 1. We had an issue when the relays were installed a leg was bent over. This cracked the epoxy base and allowed water and flux to get in. 2. We have had to bake relays after washing. We would cut open the
Electronics Forum | Wed Mar 04 10:23:03 EST 2015 | rgduval
I haven't used this particular CC, but...found this in their data sheet: "AVR 80 BA Conformal Coating will be touch dry after 15 - 20 minutes at room temperature and does not require a thermal cure. The full properties of the coating will be obtaine
Electronics Forum | Wed Mar 04 10:59:24 EST 2015 | jpierre
Hi first DS65 version is a specific dilution for dispensing machine, in this case the typical process is following: application of the conformal coating extraction of solvent (low extraction power is better)2minutes and drying the drying can be done
Electronics Forum | Mon May 09 13:55:33 EDT 2016 | dyoungquist
Omega Aqua Clean LPH. The flux we use in our selective solder process is Kester 2235. Our process cleans water soluble flux very well if cleaned within 24 hours of the boards being processed. We have sent boards off for cleanliness testing per sta
Electronics Forum | Fri Nov 17 03:07:19 EST 2017 | wellpcb
Hello there, This is wellpcb, which have two modern PCB factories. WellPCB specializes in online prototyping and assembly. With brand new equipment and total production area over 10,000 sq.meters, WELLPCB is capable of producing 100,000 square feet o
