Electronics Forum | Thu Jun 26 12:46:33 EDT 2008 | frankr
One way we handle this situation is to produce a wave pallet that presents the pcb at an angle to the wave to stagger the leads of the connector.
Electronics Forum | Fri Aug 29 07:56:56 EDT 2008 | davef
Omid It depends. Follow the guidelines of ANSI/J-STD-033, Standard for Handling, Packing, Shipping, and Use of Moisture/Reflow Sensitive Surface Mount Devices. It's available on-line.
Electronics Forum | Tue Sep 02 12:43:12 EDT 2008 | stepheniii
That could lead to oxidation of the leads and worsen solderability. It's much better to make sure the components are handled properly and not exposed to moisture. The reason for baking is moisture in the body not in the leads. Why is no one suggest
Electronics Forum | Wed Sep 03 12:29:47 EDT 2008 | omid_juve
That could lead to oxidation of the leads and > worsen solderability. It's much better to make > sure the components are handled properly and not > exposed to moisture. > > The reason for baking is > moisture in the body not in the leads. > > W
Electronics Forum | Thu Sep 11 13:51:57 EDT 2008 | stepheniii
How are they being stored and handled? It might be an MSD issue. I think IR reflow would be a worst case scenario.
Electronics Forum | Mon Sep 15 20:17:52 EDT 2008 | vladig
Hi Adam, Since you don't see any cracking right after re-flow, then the most probable cause is the board flexture during handling/assembly. I bet you see cracking in the outer row(s) and mainly in the corner balls. Regards, Vlad
Electronics Forum | Wed Sep 17 18:16:28 EDT 2008 | yam6rider
Adam, Most leadfree components can handle only 260C. When you doing the profile, you should put thermocouple on the of the BGA package and to ensure the temp is not go over 260C.
Electronics Forum | Tue Nov 25 10:04:39 EST 2008 | wavemasterlarry
I've made storage bins made from old beer cases i had laying around. Seems to work well and I can check to see if any parts broke off b y looking at the bottom of the case.
Electronics Forum | Tue Nov 25 10:11:25 EST 2008 | slthomas
What are you currently using to store boards in between processes and/or work stations, and during manual assembly (assuming there is some)?
Electronics Forum | Wed Nov 26 10:03:12 EST 2008 | cyber_wolf
Chunks, Are you completely happy with the gel flex system ? You say you use it on pick and place too. What types of machines do you have ?
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