Electronics Forum | Fri Jun 18 12:33:02 EDT 2010 | bob2000
Davef, Thanks for the reply. I do not know if a radial capacitor needs to be secured with adhesive. The board in question is a class 2 device where high reliability needs to be achieved. I can not find any book references where adhesive application i
Electronics Forum | Fri Jun 25 15:04:39 EDT 2010 | siddharth
Thanks for you suggestions, guys. davef, I am gonna get with my PCB suppliers and talk to them about copper balancing and checking the Tg of the materials they use. SC, I am working towards designing wave pallets for my boards and try your suggesti
Electronics Forum | Tue Jun 29 14:44:26 EDT 2010 | rgduval
There are some good suggestions here...reflow pallets, and copper balancing. We would also suggest verifying that your problem is not caused by moisture. How much time passed between first side and second side reflow, and how humid is the environme
Electronics Forum | Wed Jun 23 08:47:32 EDT 2010 | mun4o
Hi, about location - components are in the diferent location on PCB.In the one PCB have 7 cap 560pF 0603 , and some of thenm are cracked, another are OK. When I look at 20x microscope , I can't see defect, but ICT measure from 200 to 350pf.When hea
Electronics Forum | Fri Jun 25 09:18:23 EDT 2010 | flipit
Thanks, Dennis. That is a good idea, but I > have problem :) - our logistic department lookig > for cheap components...What other mnfg of cap you > use? Regards, The capacitor dielectric material might be something you could look at also. COG,
Electronics Forum | Sat Jun 19 13:57:26 EDT 2010 | dan_ems
Hi, is someone who has experience in programming SI-V200 AOI machine? I'm curious how long takes to make a new program for a board with 50 types of components (30 ssop, sop, qfn, BGA and the rest up to 50 components 0603, 0805, 1206), without having
Electronics Forum | Sat Aug 14 13:35:34 EDT 2010 | jdm2008
On our machine it takes about 2 or 3 hours to make a program from scratch with an initial library(say 180 components per circuit, 10 identical circuits). If we had to do all the components from scratch I'd imagine it would take at least 10 hours pos
Electronics Forum | Wed Jun 30 14:06:24 EDT 2010 | jax
I assume you are talking about a Foreign Object Elimination checklist... It should include: 1. Date 2. Shift (if applicable) 3. Section designee 4. FOB Monitor 5. Supervisor 6. List of items being checked... ex. 1. "FOE bags are available and i
Electronics Forum | Mon Jun 21 08:01:38 EDT 2010 | jm
Hello, need some help if anyone has any insight on this issue. Ran first side and ex-ray indicates BGA parts look normal. Ran the second side and now the BGA balls on first side appear to have broken free and moved under part. This board has BGA's
Electronics Forum | Mon Jun 21 21:02:27 EDT 2010 | tpvnew
Dear experts, I am new in this field, I try to figure out an SMT line’s capacity, but, it looks the capacity varying from a lot of factors, such as, number of component, layout of component, size of PCB… I am wondering if there is a simple but accura
