Electronics Forum | Tue Jul 20 16:55:21 EDT 2004 | vwhipple@sono-tek.com
Pin Holes can be caused by many things. Does the problem come and go?? If so, see if there is a correlation to lot numbers on the boards or vendor. This could indicate a supplier issue.. possibly with the mask. Look at your soldered assemblies und
Electronics Forum | Thu Jul 29 00:42:32 EDT 2004 | C.W
hello, BGA was a little excessively reflowed with dwell time(above 183C - solder paste = 63/37) over 2 min, peak temp is 218C. I inspected the BGA under X-ray and there is a little voids but within the acceptable range, i then used the Ersascope to c
Electronics Forum | Mon Aug 09 10:30:25 EDT 2004 | AJ
celldude, I have a couple more questions for you. Where can one look into getting these machines necessary for SSD? Also, knowing that the machines are expensive..Does your company find they are saving money (in the long run) by using SSD? More spec
Electronics Forum | Thu Aug 12 13:34:03 EDT 2004 | gregoryyork
Yes unfortunately solder resist again, getting boring I know. That green stuff on the boards causes all kinds of problems if not applied correctly. Can't blame the flux (as usual) or the process as he has tried all varients to no avail and therosin s
Electronics Forum | Thu Sep 02 08:19:17 EDT 2004 | Bryan Kerr
One for discussion I think. There appears to be limited options when it comes to the control of moisture sensitive devices through the assembly process, the options being a paperwork based system or the use of RF tracking software. We have some ideas
Electronics Forum | Thu Sep 23 23:42:52 EDT 2004 | KEN
The LF pastes will have virtually NO wetting spread. This is normal. LF mobilities are virtually non-existant with SAC alloys. However, the addition of varrying amounts of silver can (and does) improve mobility but, this comes with a price (paste
Electronics Forum | Fri Oct 01 13:04:09 EDT 2004 | dorklover664
The company that I work for just bought two new Samsung pick and place machines (CP45FV). I love them. But we are having problems with the vibe stick feeders that we have. They have no groves or slots for the parts so if the tubs move at all the pla
Electronics Forum | Tue Oct 05 02:24:58 EDT 2004 | darby
What config are you replacing? ie 1 machine, 2 x 3machine lines, 1 x 2 machine line etc. What do you want to place with it? I can't comment on the Contact machines having never used one. On Samsungs I will say this. For your own benefit consider the
Electronics Forum | Thu Oct 28 11:41:21 EDT 2004 | Steve Stach
Hello Loz, Blue residues on circuit boards can be caused by copper corrosion, component body deterioration, marking permanently, and adhesive break down. In this case, a more subtle mechanism appears to be possible. This is a no clean application
Electronics Forum | Tue Nov 02 05:28:24 EST 2004 | rlackey
Hi Chunks, That would be due to Mr Dumont asking for recommendations on types of ovens! Yes, I agree paste is a major factor, as is type of board (size, construction, palletisation, heat requirements etc), but also real experiences from users help
