Electronics Forum | Mon Mar 29 19:31:29 EST 1999 | Scott McKee
| | | Hi, | | | I have a customer who's electronic assemblies produce RF. He is insisting upon aqueuos cleaning. We switched to a no clean solder years ago and no longer have an aqueous system. | | | Is aqueous cleaning necessary to eliminate 'cr
Electronics Forum | Wed Mar 20 13:54:56 EST 2002 | Aaron C
I am starting to use BGAs more and more in our process, which is using water soluble paste. Taking to the Paste Rep, he had pointed out that if you add Surfactant Packs to your inline water wash, that it would help get the water underneath the BGA pa
Electronics Forum | Wed Mar 20 20:02:06 EST 2002 | davef
Surfactant. A synthetic detergent made from petrochemicals that lowers the surface tension of water and allows better cleaning in small spaces. Do you have a cleaning issue that requires you to use a surfactant? If so, be aware that you must clean
Electronics Forum | Sat Aug 26 12:26:57 EDT 2000 | Ramon I Garcia C
Hi friends: I have a problem in the process of one PCB, I have a lot of insuficients of solder in top of the board, this pcb already was working good, but sudenly began there isn't flow thru hole, I ran the profile and it was ok, if I inmerse i
Electronics Forum | Wed Sep 04 23:55:10 EDT 2002 | jersbo
aight... Ive read the SMT archives... Ive got issues,,, 25 boards WS boards with NC on them HOw do I clean them? Used Everkleen in Prewash and wash in a dishwasher , cleaned most of the NC flux off but I have residuals. especially on the fine pitch
Electronics Forum | Fri Jun 01 09:50:01 EDT 2001 | lumidor
Our PCBs manufactured with no clean flux have a waxy film on the board...is this normal? Our contract manufacturer recently switched to no clean from water wash. Thanks Carl
Electronics Forum | Wed Oct 02 15:20:55 EDT 2002 | Eric
Is there a steadfast rule of thumb for a good solder joint on an Enig Gold board. I come across this number 217C when discussing BGA profiles. Is this a published number? I sure could use a reference. Anybody feedback is appreciated.
Electronics Forum | Wed Oct 02 16:13:05 EDT 2002 | babe
Have you had your solder pot tested? I find that levels of contaminants can rend a solder joint that dull look.
Electronics Forum | Thu Sep 26 14:43:43 EDT 2002 | Jim M.
unsure of what solder spec. your working to?.IPC/EIA J-STD-001C, Section 9.2.4 clearly states dull, matte, gray or grainy appearing solders are accpetable depending on your process and if the acceptability of the neaxt paragraph is met.IPC 610 and J-
Electronics Forum | Wed Oct 02 18:18:58 EDT 2002 | davef
The steadfast rule of thumb is: In order to get reliable reflow, you need to be at or higher than [liquidus + 20�C] for about 5 to 10 seconds, rather than those old "60 seconds above 183�C" guideline. This provides for setting your peak based on the
.gif)
