Electronics Forum | Sat Jun 27 10:10:23 EDT 2009 | ysutariya
I'm not in assembly, but I do know of a technology called Sipad if you are only looking to do small batches. They pre-apply the solderpaste to boards with a light adhesive, which allows you to hand-place components, even micro BGA's and fine-pitch Q
Electronics Forum | Thu Aug 06 19:20:09 EDT 2009 | boloxis
easy, just dip the ICs on a very weak solution of Nitric Acid, by very weak I mean like drops of Fuming Nitric acid in a half full DI water beaker. Place the beaker on a Ultrasonic bath and dip/shake the ICs in the solution in 5~ 10 seconds only. You
Electronics Forum | Mon Oct 19 12:17:16 EDT 2009 | wrongway
We have yet had the need to use local fids on our boards you must be putting down pretty fine pitch parts that are needing the acurcey if it is failing fids that are within the search area then maybe its somthing else size our lighting it should fin
Electronics Forum | Mon Oct 19 19:40:34 EDT 2009 | swag
Thanks for the input. These are 80 pin fine pitch connectors on arrayed flex circuits. We have found from experimenting there is really no good alternative but to use local fids. I found what I'm doing wrong - I needed to move fid finds and correc
Electronics Forum | Mon May 31 11:04:06 EDT 2010 | aj
Hi Manuel, Do you not have a fine pitch placer?if not may be you need to slow down the placement speed on the QFN - I would imagine you would get a lot of fails trying to use the vision to pick up the component lands. We place thousands of QFNs and
Electronics Forum | Tue Sep 14 10:10:39 EDT 2010 | teamcanada
We are having an issue with a PCB supplier. Their Tin HASL layer seems to be the problem. We have triedworking with them to correct their process. What seems to have helped is lowering their temperature of the Tin dip from 540 F to 510 F.We still ha
Electronics Forum | Fri Nov 05 12:25:42 EDT 2010 | deanm
I think you are right. According to IPC-7526 section 6.2 says that using compressed air to blow out paste will damage the stencil, especially between fine pitch apertures. It can also broadcast solder paste onto other surfaces or personnel. I recomm
Electronics Forum | Tue Jan 17 21:40:08 EST 2012 | gaz
I'm testing SN100C, and with our 5 zone oven I seem to be able to fix one issue by changing the profile, but that might introduce a new problem. Some profiles work very well on most components, but have issues on other components. These are usually 0
Electronics Forum | Fri May 11 15:12:00 EDT 2012 | bwjm
Hi Guys, I need some help. I was running prototyping volume previous and my SMT line uses manual printing. Business has picked up and i started to get higher volume 300 to 500 pcs each model. I am running a small firm and have only a small sum of cas
Electronics Forum | Mon May 21 10:25:16 EDT 2012 | swag
Ask for board fiducials if you're running arrays. Global fids on the panel do not work well. One handy product we use on flex is "Tacsil". Works well on SMT pallets as well as router operation. It's double sticky stuff that helps hold on to the P
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