Electronics Forum | Thu Jan 13 03:38:18 EST 2005 | Base
Hi Grant, You say your design are increasingly using more passives. Do you mean you're using more and more components per board or is it only the ratio passives/IC's that is shifting? And are you also increasing volume or is it just the component-co
Electronics Forum | Thu Jan 27 11:23:45 EST 2005 | russ
Well first off I wouldn't evaluate paste for a wave process. I would use solder bar instead. Flux - top side fillets and no shorting on the solder side, does it clean well after processing if using water soluble flux. How wide is the process win
Electronics Forum | Mon Jan 31 07:36:54 EST 2005 | Nifhail
Hi all, In general, I am looking at restructuring of our rework processes in our factory. Despite all the effort put into design, process, material etc, there will always be some assemblies that must be repaired. Over the years, alot of hi-technolog
Electronics Forum | Wed Feb 09 12:28:58 EST 2005 | Valerie
We have been pretty successful with screen printing glue, however the smallest component we now glue is a 0805. We had many problems using our Gemini II to put down glue dots for a 0603, so we altered the pads to do double-side reflow. As our own int
Electronics Forum | Tue Feb 22 10:44:12 EST 2005 | Dougs
when you talk about stencil design, what would you recommend for aperture size on fine pitch if the customer insists on hasl finish on fine pitch devices? i usually use a 10% reduction on everything we have been using ( 16mil pitch and upwards and 0
Electronics Forum | Thu Mar 03 18:09:06 EST 2005 | gpaelmo
We also use Indium NC-SMQ92J. We do the same as mentioned per Russ. We reduce apertures mostly on QFP's with pitch of 25 mil or less (we place down to 15 mil QFP). All other apertures we keep 1:1. We print resnet 0805 size with no problems. You might
Electronics Forum | Thu Mar 03 12:55:31 EST 2005 | dru_wells
We seek the following. Any referrals would be appreciated. Responsible for the complete development of unique feeders that present custom metal stampings and connector products for pickup by industry standard placement machines. The parts will be i
Electronics Forum | Tue Mar 15 17:58:56 EST 2005 | darby
Mat, Are you sure you should be using SnPb HASL boards if you are doing prep for lead free? If you aren't actually going to comply with RoHS then fire away. Nearly all of our assemblies are now ENIG and as any re-design comes up on a HASL board it is
Electronics Forum | Fri Mar 18 10:18:35 EST 2005 | That's Mr. SMT-Tech to you!!
Here's a good one!!! I've got a customer who is designing a small circuit board, and they want to reflow BGA solder balls directly to the bottomside of the PCB to effectively create a BGA style interface between his PCB and another PCB. Anybody ever
Electronics Forum | Sat Mar 19 20:59:57 EST 2005 | nate
i have a bit of a problem. i need a 320x240 lcd with a 5.7" screen, and a max width of 146mm. i have checked with about a dozen manufacturers and 148mm is the smallest they make without custom designing the pcb, and this is prohibitively expensive. w
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