Electronics Forum | Thu Jan 02 08:04:06 EST 2020 | philc
You might want to try baking the LED's in an oven for 24 hours prior to build. We keep our LED's in a humidity cabinet all the time, as we have noticed poor solderability if they are left out for too long. This may be even more important when buying
Electronics Forum | Fri Dec 13 12:29:01 EST 2019 | davef
I'm not conversant in the topic, but I know suppliers to the government are concerned as you are. I have attended sessions on the topic at technical conferences. The topic that you want to search for is long-term storage protocols for electronic comp
Electronics Forum | Thu Dec 26 20:35:48 EST 2019 | luciano_zhang
I have design some PCBs but last time I met one problem they said missing the solder mask ...any one can give some suggestions why do some pcb manufacturers reject gerbers due to missing sodermask?
Electronics Forum | Tue Dec 31 02:29:29 EST 2019 | sssamw
Do you have clear picture show how it looks like solder open? And you can run DOE with TAL and soak time and peak temperature to see which factor is key, or non of them is key then you can try add some flux to see if better before change solder past
Electronics Forum | Tue Dec 31 17:05:20 EST 2019 | slthomas
Assuming you've already looked at optimizing your profile and stencil design, have you looked at metal load in the paste? I hadn't, but just read that increased metal load (associated with reduced powder size, i.e., moving from T3 to T4) has been sh
Electronics Forum | Sun Jan 05 20:10:16 EST 2020 | sssamw
Yes, you may need tell us how the PCB designed, how it re-flow(even it's Indium voiding formula), how stencil is. The void ratio means area ratio, not diameter ratio, so you need calculate it. If you have high ratio void, show its picture.
Electronics Forum | Wed Jan 01 13:03:06 EST 2020 | ramsus
hello experts i want to calculate my target of cph i have a panasonic line composed of three machines 1.CM602L 4 HEADS 12 SHAFT 2.CM602L 4 HEADS 12 SHAFT 3. CM602L 2 HEADS 8 SHAFT + 2 HEADS 3 SHAFT Best regards
Electronics Forum | Wed Jan 08 19:16:56 EST 2020 | spoiltforchoice
http://suddendocs.samtec.com/literature/em_tectalk8a_lr.pdf Even so its still a fairly manual process so I guess you really have to want to use this type of connector because its a whole process in itself and I bet the whole family is a special or
Electronics Forum | Thu Jan 09 18:26:21 EST 2020 | spoiltforchoice
Much like DWL we have multiple stencils that are really quite old (~2003 and still in use) and are perfectly OK. In fact I don't think we've ever worn one out, higher volume designs are far more likely to get a layout change before the stencil gets
Electronics Forum | Fri Jan 10 13:21:34 EST 2020 | emeto
Yes, think of 3prints/minute 24 hours. This is about 4000 prints a day. than you have a marginal process, because customer locked design and doesn't want to change anything. So in our case for 70k-100k prints and we had to change them as the perform
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