Electronics Forum | Thu Dec 14 04:42:11 EST 2017 | jineshjpr
Can anybody suggest how can I achieve good solderability in convectional reflow oven If I reduced Convection Air Speed 80%. The whole purpose is to reduce 0402 LED tilting in the convectional reflow and the PCB having QFN with 60 to 120 sec soak, 30
Electronics Forum | Thu Dec 14 05:07:55 EST 2017 | tsvetan
picture of the problem would help people to speculate what you do wrong
Electronics Forum | Thu Dec 14 15:05:17 EST 2017 | emeto
I am pretty sure, you are looking into the wrong spot. Your paste is too much, or your part has very inconsistent narrow leads(that includes wrong pad design as well.)
Electronics Forum | Wed Dec 20 07:16:16 EST 2017 | stephendo
I agree with Evtimov. What he didn't point out is that the surface tension of the solder would vastly overwhelm any force from air flow.
Electronics Forum | Thu Jun 06 16:26:36 EDT 2002 | Bob
Thanks for all the input. It is pretty much what we have checked for, microscopic analisys before printing, assembly and reflow, but like we all seem to agree one ball of solder is hard to find. The boards are full QWERTY keypads with a few LED's a
Electronics Forum | Sun Aug 16 16:01:06 EDT 2009 | davef
White, lead free * Taiyo America PSR-4000 LEW1 * Huntsman (formerly Vantico, formerly Ciba Geigy) Probimer 77 white solder mask Also, search around LEDs Magazine [ http://www.ledsmagazine.com/ ]. White solder masks are often used as a reflective ba
Electronics Forum | Tue Jun 08 17:31:15 EDT 2010 | whitewing
For protos and very short runs I already use a polyester stencil + pizza oven process which is fine except for the placement time and tedium. I'm partly trying to bridge the gap between that and stuff that needs subbing out due to quantity, and partl
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