Electronics Forum | Mon Mar 27 09:58:19 EST 2006 | samir
When you say "unacceptable" do you mean cosmetically unacceptable? I've always put as much flux (no clean, of course) on the board until the ICT guys start yelling at me. That's how I roll... Lots of factors with no-clean flux residues...board mas
Electronics Forum | Thu Sep 26 15:28:16 EDT 2013 | joeherz
I know - A stimulating topic.... IPC-TM-650 2.3.28 method calls for a PCBA or PCB to be placed into a bag with solution, shake, analyze. Great. There is a method of doing this testing that focuses on a specific area of a PCB or a component where r
Electronics Forum | Wed Apr 02 09:45:25 EDT 2014 | swag
Not sure what kind of humidifier you are looking at but here's my experience: We have 4 humidifiers. All are ultrasonic supplied with DI water. They work well but... UT humidifiers will create a foggy white residue that will stick to things in cl
Electronics Forum | Wed Jan 13 12:17:47 EST 2016 | trampacorp
Thanks for your input Michael. Basically the > boards had been go through from washing and even > ionic contamination already. In order to > eliminate or detect the flux residues, is there > any equipment something like a uv lamp that can > dete
Electronics Forum | Wed Oct 06 23:36:28 EDT 1999 | karlin
| | | Hi, | | | | | | Help! Could anyone help to enlighten me on this? | | | | | | Question: | | | | | | If I have a CSP/BGA package of size X by Y and the standoff gap between the component and PCB is Z, What is the maximum allowable Y/Z or X/Z
Electronics Forum | Tue Mar 28 11:17:19 EST 2006 | smartasp
Thanks for the input Guys Yeah the not so knowledgable customer does not like to residues for cosmetic resons. The flux is for lead free process, of the no clean and water soluable type. We have explained to him that technically the residues do not
Electronics Forum | Fri Sep 09 15:03:46 EDT 2005 | Amol
Hi, I am running a circuit board that needs a part to be put on it after cleaning and before conformal coating. the only problem is that after cleaning and hand assembly of the part, there is a thin whitish residue in the ckt board that one can see w
Electronics Forum | Wed Oct 10 08:01:28 EDT 2007 | ck_the_flip
We use Indium 1074-EXR on ERSA, and it's performed miracles on our yields. Spot soldering, like wave, is all about fundamentals. Put just enough flux, preheat to prevent thermal shock and activate the flux, and then solder with enough dwell time to
Electronics Forum | Wed Jul 05 17:06:36 EDT 2000 | Michael Parker
Patrick- You have not given enought detail of the type of discoloration. Is it "white residue"? Can it be "rust" colored? Whatever it is, you fab supplier needs to be called in immediately and give you an exact reason for this failure. Just rubbing
Electronics Forum | Tue Jan 23 20:53:51 EST 2001 | davef
Sorry, not much help for me there. More information would be helpful. For instance: * Talk about the distribution of the problem, including a single lot or from various lots and over components and component types on the board * Tell us about the boa
