Electronics Forum | Tue Feb 02 14:42:55 EST 2010 | davef
smt_guy: In removing passivation coats and handling oil, board fabs do light washes with: * Sulfuric acid * Alkaline * Water ... and then blow dry. They do not see "oil" like you seem to be talking about. Their "oil" is the assumption that someone
Electronics Forum | Wed May 08 11:30:58 EDT 2013 | jaimebc
Stephen, We are now running with 99.999 N, New nozzles and our wave height has stabilized. I will look into the Apidic Acid to clean our nozzles. Thanks for the input. I am just amazed at the difference the nitrogen grade made to our process. Goin
Electronics Forum | Fri Jan 26 12:57:34 EST 2018 | aqueous
Sorry to disappoint. No-Clean fluxes are resin-based. They are not soluble in water. Water soluble fluxes are by nature Organic Acid and are soluble in water AND must be cleaned within a short period after reflow as they remain conductive and corrosi
Electronics Forum | Tue Apr 05 20:45:36 EDT 2022 | stephendo
Try adipic acid to clean your nozzles. It is a powder and can be awkward to work with as a result. But you might end up preferring it. Also look where the substance is not. There are two PTH joints without it. And that chip cap is closer to the PT
Electronics Forum | Thu Feb 08 05:54:43 EST 2024 | 1_manuel
Thank you for your response! I think, the labels seem more elegant and offer the flexibility of being reversible if the labeling isn't satisfactory. However, the punch numbers themselves are also a viable solution, so thank you for that suggestion
Electronics Forum | Sat Aug 21 12:29:28 EDT 1999 | Brian
| I have a layer of electroplated solder (10/90) that appeares to have some sort of contaminent on it. Water will not wet to the layer in some areas. I have tried using 10% HCl in DI as a cleaner as well as 7.5% Fluoboric acid in DI. Neither has t
Electronics Forum | Wed Oct 10 13:51:08 EDT 2007 | petep
Coilcraft has posted the following and I am wondering how you folks are handling the use of coils in a Water Soluble world. PCB Washing and Coilcraft Parts Coilcraft tests for resistance to solvents per the following specification: Resistance to s
Electronics Forum | Sat Dec 02 12:03:40 EST 2000 | Jamey Butteris
If you put a 6v battery on a 12v solar panel, it will charge the battery. It will also overcharge the battery and may damage the plates if you leave it on too long. The 'float' voltage for a lead acid battery (6v) should not exceed 7.2 volts for exte
Electronics Forum | Thu Jul 13 10:10:48 EDT 2000 | Todd
Donnie In response to your questions; 1. Flux is Multi-core X32-10M 2. Preheaters temperatures can range based on board density. the goal is to get the top side to 100C before wave. 3. Components can't be placed after wave solder, they are surface m
Electronics Forum | Wed Jun 07 20:21:26 EDT 2000 | Dave F
Point well taken John. Expanding on epoxies: Novolac is a multifunctional epoxy ... a phenolic resin. Most phenolic resins are made using phenol (P) and formaldehyde (F). They comprise the bulk of IC packaging and are divided into two classes:
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