Electronics Forum | Wed Dec 27 17:13:28 EST 2000 | John K.
As part of an Intel erratum, they changed their BGA coplanarity spec from .006" to .008". The package is 23 X 23 partial array, .050"(1.27) pitch, 1.220"(31) square. We apply paste onto BGA pads with a 6-mil stencil. From a process perspective, sh
Electronics Forum | Thu Nov 09 23:27:53 EST 2000 | Craig
We are considering using gold plating on our fine pitch pcbs (as oppossed to HASL). We have heard of long term solder reliability problems with joint imbrittlment how bad is this and does it apply for all of the different plating processes the same?
Electronics Forum | Sat Oct 28 10:13:27 EDT 2000 | KF Lok
1) Try to keep lead as short as possible. 2) The long side of the connector in the direction of conveyor. 3) Use pallet, design such that the connector is 45 degree to the wave.( or conveyor). May not remove all shorts but reduce to one area i.e. th
Electronics Forum | Thu Oct 05 17:05:36 EDT 2000 | JAX
These types of foil kits work just fine as long as they are used before expiration. Scraping off the epoxy coat gets a little tough on fine pitch pads and etches. I have always like to use a solder sample board to retrieve my bits & pieces from whene
Electronics Forum | Thu Jul 27 11:47:02 EDT 2000 | Jason
i've rotated the board with the same result. What are soldertheif pads. I'm new to wave soldering and this is another new one on me. What did you use? where do you put the pads? please explain as much as you care to...also my leads are 1mm and th
Electronics Forum | Thu Jul 27 11:47:15 EDT 2000 | Jason
i've rotated the board with the same result. What are soldertheif pads. I'm new to wave soldering and this is another new one on me. What did you use? where do you put the pads? please explain as much as you care to...also my leads are 1mm and th
Electronics Forum | Tue Jul 25 03:30:26 EDT 2000 | gary
We got PLCC 68 components on our new products and we are not sure on what feeder pitch we are going to use for the said part as we do not have 44mm feeders. Can anyone there help me what feeders are they using for the said parts so we won't end up bu
Electronics Forum | Wed Jul 19 01:20:17 EDT 2000 | Craig
Does anyone have any experience wave soldering TQFPs. Our R&D is wanting us to do this but we (production) are hesitant. I've found some recommended pad designs and solder theiving designs in a Philips app note "SMD Mounting Methods". The theory look
Electronics Forum | Thu Jun 29 09:36:04 EDT 2000 | JAX
Peter, There is no truth's about the way things are, How something is done is only bound by who is doing it. You can check the archives for info to get you going but it's all up to you. As far as placement order, it all depends on what you are placin
Electronics Forum | Wed Jun 28 13:45:20 EDT 2000 | Paul Wright
A portion of our business is quick turn prototypes. The difficult part of doing this effectively is component descriptions. One customer will call a component SSOP-20, another will call his SSOP-20 but the lead pitch will be different, another wil
