Electronics Forum | Mon Mar 19 22:09:38 EDT 2012 | davef
J-STD-003B prescribes test methods, defect definitions and illustrations for assessing the solderability of printed board surface conductors, attachment lands, and plated-through holes utilizing either tin/lead or lead-free solders. This standard is
Electronics Forum | Fri Sep 03 12:36:27 EDT 2004 | Frank R.
That's what I have ... two 5 zone reflow. A representative from AIM told me that 7 zone reflow is required with PbFree. It's good to know that it work fine with a 5 zones. Florida cirtech is the company who told me that SN100C do not damage your w
Electronics Forum | Wed Oct 29 07:21:59 EDT 2008 | davef
During soldering, the gold dissolves into the solder connection. You solder to the nickel. The gold protects the nickel from oxidation. Corroded nickel is very difficult to solder. So if your gold is thin, it may not protect the nickel from corrosion
Electronics Forum | Thu Sep 02 10:24:35 EDT 2004 | dj_jago
Greetings from the UK: I have been quite fortunate to lead (no pun intended) our company towards lead free sooner rater than later. One of our customers produces a product which is refurbushed every 6 months or so and sent back into the market. A
Electronics Forum | Thu Apr 17 05:14:40 EDT 2008 | gregoryyork
I have seen similar things like this before with Solder Resist redepositig back on the pads, this is a clear residue very hard to see. Solder resist will obviously resist solder adhering to it. If you rework the boards then the heat of the iron will
Electronics Forum | Thu Jan 26 11:42:58 EST 2012 | davef
Here's what we hear you saying: * Trying to repair a printed circuit board assembly * There's a problem replacing a 57 pin, 20 thou connector * Can't get enough solder paste on the connector leads * Printing paste, replacing the connector, then reflo
Electronics Forum | Fri Aug 14 08:41:23 EDT 2015 | emeto
I don't know what paste you are using, but most of the leading brands can stay out of the fridge for up to 6 months.The paste you already took out of the cartridge should last you several days - up to one week, depending on your room temperature and
Electronics Forum | Wed Feb 26 13:15:52 EST 2003 | Mike Konrad
The specific answer depends on what your specific application includes. #1: What are you removing? (solder paste, adhesives) #2: What are you cleaning? (stencils, screens, misprints, pallets) #3: What type of machine are you using? (Spray-in
Electronics Forum | Mon Mar 19 11:26:21 EST 2001 | Steve
Another issue is that once solder paste has been reflowed, the majority of the flux is gone. If it is reflowed again without solder flux, the risk of introducing oxidation to the component leads is increased, thus creating a weak solder joint.
Electronics Forum | Fri Aug 04 04:26:31 EDT 2000 | Charles stringer
I am experiencing a problem when soldering down a TO263 package. The device has a large solderable tab (approx 8mm square)on the back and 5 leads. Sometimes the leads are not soldered to the board properly. I am using a metal mask with 9 "windows" of
