Electronics Forum | Sun Apr 03 00:34:56 EST 2005 | Andrew
Can anyone advise the best aperture opening and stencil thickness for Nexlev connector?We are seeing high reject for open solder.
Electronics Forum | Mon Jun 27 06:52:07 EDT 2011 | rpatel28364
Hi All We are facing problem with solderability of BGA connector. After Xray we have found open under BGA connector. After removing from PCB it seems some copper pads are still gold. We are not sure why this is happening. We have 5 thou stencil and
Electronics Forum | Mon Jun 27 21:28:15 EDT 2011 | samsim
It seems to be no solder paste release at certain stencil opening, you may need to enlarge the stencil opening. By the way what is the area ratio for the opening and how is the shape (round/square/diamond)?
Electronics Forum | Tue Oct 15 17:54:08 EDT 2019 | davef
From J-STD-001: Components designed for pin-in-hole application and modified for butt connection attachment, or stiff-leaded dual-inline packages (e.g., alloy 42, brazed or tempered leads) may be modified for use on Class 1 and 2 products but shall n
Electronics Forum | Mon Apr 04 09:30:49 EDT 2005 | russ
Andrew, we need a lot more information to help. 1. what is the open caused from? bemt pins, non-wetting, board bowing, or no paste deposited. 2. What is your current stencil design? 3. What does this connector look like and what are the pins? Rus
Electronics Forum | Mon Jan 13 17:39:49 EST 2020 | avillaro2020
Hi, I need help on how to address the solder wicking on the samtec searay connector after reflow resulting to open solder joints on thick and thermal heavy PCB (4.4mm and 6.3mm). I increased my solder paste thickness to 8 mils, the connector is manua
Electronics Forum | Wed Jan 15 11:18:51 EST 2020 | avillaro2020
Hi Evtimov, Thanks again! The solder wicking/open solder joint is not actually gross rejection, it is only a few and appeared random (difficult to trend the location of the opens), what is perflexing is that i have this 1 or 2 open solder joints sur
Electronics Forum | Tue Jan 14 17:22:16 EST 2020 | emeto
Avillaro, would you say that vapor phase process was selected, because the boards are so thick and heavy? I would assume so. Have you ever tried to run them through reflow oven? To understand better your challenge, we need to understand the setup be
Electronics Forum | Tue Jan 14 11:53:44 EST 2020 | avillaro2020
Hi Phil, thanks. I am successful using the same connector on small thinner boards 2-2.5kg) i cant make it work, tried all kinds of profiles with vapour phase but to no avail. Yes you read it right 4.3-6.3mm pcb thickness and 2-2.5Kg. And it is 44 lay
Electronics Forum | Fri Sep 15 21:24:28 EDT 2006 | realchunks
Use a back door connector. Place and reflow the connector like any other. But, the PC bosrd is cut open directly under the connector allowing the male portion to go thru the PCB and mate with the female connector. Both PCBs would have SMDs mounted
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