Electronics Forum | Wed Apr 09 11:31:22 EDT 2003 | ksfacinelli
Dave, So if liquidus is 184 are you saying I should be at 209 for how long??? Kevin
Electronics Forum | Mon Feb 14 02:59:03 EST 2000 | Joe
check the solderablity of the board and the thickness of the solder before screening, if you are using HASL finished boards.
Electronics Forum | Mon Feb 14 12:05:24 EST 2000 | Dave F
Masdi: Are you sure you have your washer set-up correctly? We never have problems with solder balls. Ta. Dave F
Electronics Forum | Wed Mar 02 10:24:48 EST 2005 | Guest
Balls are 0.30 mm diameter, with a height of 0.24 mm It's a 8*8 mm 184 pins BGA.
Electronics Forum | Fri Feb 11 08:51:45 EST 2000 | HMAL
Dear Masdi, Perhaps you should check again your screen print process. Small amounts of solder paste under stencil can cause your problems. This paste is from previous printed pcb. When printing next pcb this paste attachs to places that it doesn't
Electronics Forum | Tue Feb 27 10:26:19 EST 2001 | jcboetcher
Hi I'm a first time user of SMTnet. I have a Electrovert Wave Soldering Machine Ultra 2000 with a AT&T Spray Fluxer. I'm looking for a upgrade or a replacement Spray Gum Binks Model No. Z-6-434 and or nozzles ( Fluid tip assembly No. 184A / 156A.
Electronics Forum | Fri Feb 11 08:24:51 EST 2000 | Masdi
Hi, Need help. We are starting to see a lot of small solder under capacitors and some of them can be bigger than 10 mils. For current action, we have checked through screen print process and component placement but still don't have any clue on how
Electronics Forum | Wed Feb 16 09:19:22 EST 2000 | MARK ALDER
Please check Circuit Assembly March 1998, article "Solder balls and aperture shapes" and August 1999 "Guiding stencil design". They can be contacted at www.circuitassembly.com The main cause of mid chip solder balls is the volume of paste that is p
Electronics Forum | Mon May 07 12:26:35 EDT 2007 | bkgsmtnet
When you say "paying price" are you referring to turnkey costs only OR are you saying that if a smt 0805 cap costs you .08 in labor + actual price you charge .08*2.3=.184 cents per placement? OR the former turnkey question of say it costs you 3 dolla
Electronics Forum | Fri Feb 11 09:48:56 EST 2000 | Christopher Lampron
Dear Masdi, Solder beading (as opposed to solder balls) is usually caused by volume of solder paste, displacement of solder paste when component is placed and sometimes the proximity of the solder depositions for that component. Basically, a small a
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