Electronics Forum | Tue Jul 14 18:42:41 EDT 2009 | anndi
1smtdude, I interested in your explaination of > re-work an underfill part. You mention the > material can be heated to a plastic state to > become vicious... do you know usually what range > is the temperate? (guess it can depend on the > type
Electronics Forum | Tue Jan 04 19:55:46 EST 2000 | Rob Thomas
Hello Yosef, non woven aramid reinforced pcb's are used where is a need for low CFT (coefficient of thermal expansion). Traditionally aramid pcb's were used in military applications in order to reduce the stress/failure rate of solder joints during
Electronics Forum | Tue Feb 27 20:17:19 EST 2007 | roderickray
I have been trying to tell people at work that minor scratches on solder resist on BGA will not effect functionality of BGA, instead they want to attempt repair of these scratches. Any suggestions.
Electronics Forum | Tue Feb 27 22:40:28 EST 2007 | davef
IPC-A-600G, 2.9 Solder Resist [Solder Mask] [snip]"Solder resists are used to limit and control the application of solder to selected areas of the printed circuit board during assembly soldering operations and are sometimes used to reduce dendritic f
Electronics Forum | Wed Feb 28 07:40:26 EST 2007 | realchunks
Hi Roderick, Guess it depends on how you define "minor". If it is just a visual blemish in the mask, there will be no affect o the BGA. If it is through the resist there may be a chance of solder shorting, which will affect it, I doubt it but poss
Electronics Forum | Wed Oct 08 00:28:31 EDT 2008 | khushi
Dear, Flexkhushi > Do you mean 2 mm thick board or .2 mm board. If > you are talking .2mm then you are refering to a > flex circuit correct? What equipment will you be > using to place the 01005 component? I am not sure > if you can even place a
Electronics Forum | Tue Oct 07 09:40:44 EDT 2008 | john_smith
Dear, Flexkhushi Do you mean 2 mm thick board or .2 mm board. If you are talking .2mm then you are refering to a flex circuit correct? What equipment will you be using to place the 01005 component? I
Electronics Forum | Fri Jul 20 17:09:10 EDT 2001 | davef
Circuits Assembly magazine 09/99 "Defluxing with Ultrasonics" by Les Hymes. [There's more but I can't find it right now. I'll add to this as I find the junk, er very nice stuff.] J-STD-001C states that its OK to use ultrasonics for cleaning so lon
Electronics Forum | Wed Aug 18 16:26:21 EDT 1999 | Tony
Yesterday as I was creating a profile on a plastic BGA using Conceptronics freedom 2000 rework station, I happend to discover that I was able to remove solder bridging from a plastic BGA. This is what I did. Created a removal profile, I had a board
Electronics Forum | Wed Aug 18 21:26:08 EDT 1999 | Dave F
| Yesterday as I was creating a profile on a plastic BGA using Conceptronics freedom 2000 rework station, I happend to discover that I was able to remove solder bridging from a plastic BGA. | | This is what I did. | | Created a removal profile, I h
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