Electronics Forum | Mon Sep 22 15:13:59 EDT 2003 | russ
Cool!!!! I'll have to remember that one. Russ
Electronics Forum | Tue Sep 18 08:13:43 EDT 2018 | hossameldin
Thank you so much for your advise
Electronics Forum | Fri Sep 19 12:55:33 EDT 2003 | russ
We usually use a pad that is the same size as the ball. And use a stencil thickness of 7+ mils. Why the teardrop? Russ
Electronics Forum | Sat Sep 20 11:24:27 EDT 2003 | Gabriele
Few questions: - wich type of C-CGA ? (CAST or CLASP column to ceramic attach) - column pitch ? - column count ? - capped (with lid) ? or capless (c4 die on top)? - PCB board zize and thickness ? - volume of solder paste ? - Clean or not Clean so
Electronics Forum | Mon Sep 22 02:15:09 EDT 2003 | chrissieneale
We were having void problems with heat transfer down the via's (24 layer boards, shed loads of planes). So we drew the via away from the centre into a teardrop pad. Void's gone!
Electronics Forum | Tue Sep 23 06:58:13 EDT 2003 | chrissieneale
Look out for shorts due to too big pads / balls colasping too much / too much solder paste though. there's a fine line and it's expensive to find it!
Electronics Forum | Fri Sep 14 21:05:45 EDT 2018 | hossameldin
I am planning to buy SMT line for automotive products i need advise which machine is better to buy Yamaha YSM20 or Fuji NXTIII what disadvantages of each of them and advantages Thank you
Electronics Forum | Sat Sep 20 11:44:39 EDT 2003 | Gabriele
Few questions: - wich type of C-CGA ? (CAST or CLASP column to ceramic attach) - column pitch ? - column count ? - capped (with lid) ? or capless (c4 die on top)? - PCB board zize and thickness ? - PCB copper finisch ? (OSP,HASL, ENIG, etc) - v
Electronics Forum | Fri Sep 19 11:49:54 EDT 2003 | chrissieneale
OK, so is anyone qualifying CGA's yet? Our first batch of CGA qualification is not going too well. We stuck with the teardrop shaped pad but the solder fillet is not as big as expected. What size pads is anyone using, i'm getting conflicting informat
Electronics Forum | Sun Sep 16 18:57:29 EDT 2018 | spoiltforchoice
Visit the machines, get your quotes. Establish what you need, make sure you understand the running costs of each, the availability of service personnel & parts - see who wins. The answer won't be the same for everyone. Also see which software you lik
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