Electronics Forum | Wed Nov 25 01:00:54 EST 2009 | henry_usa_stencils
The design of the opening apertures for the glue stencil and the metal thickness.Its is very important. The Engineer of the stencils supplier have to look into the height of the components and the gap of the 2 leg(pads)and give the assemly house an s
Electronics Forum | Thu Nov 05 13:38:43 EST 2009 | davef
Martin It might be possible to mount a deballed BGA as you mount a QFN. Thinking about doing it, it could be a lot more difficult than first thought. When you heat a BGA, it 'dances' on the board because of the different CTE of the materials involved
Electronics Forum | Wed Nov 04 08:49:44 EST 2009 | kpm135
Its been a while since I've worked with a QSP-2 but I seem to remember that they should have a puff off value where the machine will actually blow the part off of the nozzle. I think it was adjustable under the component handling but I can't remember
Electronics Forum | Fri Nov 06 11:39:17 EST 2009 | 14367
As you know, the H1N1 virus is on the move, and we are trying to take precautions. We wish to use a 60% alcohol based lotion for disinfecting our hands. It has been questioned if the added substances could be detrimental to electronic assembly board
Electronics Forum | Tue Nov 10 12:23:38 EST 2009 | CL
Good Morning, I agree. This has been a problem job for us. They are looking for anything that could be implicated. Right now, they are focusing on the profile. My question pertains to the frequency of micro voiding on BGA devices. I have seen some
Electronics Forum | Mon Nov 16 10:50:50 EST 2009 | ppcbs
I agree customer is being overly stringent, and that their is a possibility that BGA's have voids prior to installation. If you determine that the BGA's do not have voids prior to installation I suggest you slow down your ramp speed to allow the flu
Electronics Forum | Mon Nov 09 18:54:27 EST 2009 | aqueous
The AQ400 Series (manufactured between 1992 and 1996 used a Myron-L brand resistivity controller. If you purchased this machine from Aqueous Technologies you would have received a Myron-L manual which describes the calibration procedure in detail.
Electronics Forum | Thu Nov 12 04:35:13 EST 2009 | sachu_70
You can certainly venture out to the nearest lab for in-depth analyses. But since you mention 2-3% defectives in a batch, there is much you can do in-house as well. Measure the height of your solder paste deposit (in zero print gap condition)across a
Electronics Forum | Thu Nov 12 09:32:30 EST 2009 | spitkis2
Take a look at http://www.atco-us.com/products/info/3 . Benchtop version is also available. A full forced convection oven delivers much better thermal uniformity than an IR/forced air combo system. When comparing different ovens, some things to
Electronics Forum | Fri Nov 13 11:41:37 EST 2009 | gregcr
Hi All, I am implementing a proper feeder maintenance program for my HSP chipshooter feeders. I have the calibration jig. I am developing a procedure with the following general steps: 1. Cleaning 2. Visual Inspection / Repair 3. Calibration / Testi