Electronics Forum | Fri Dec 02 09:51:05 EST 2005 | whippingpost
I have an assembly that uses several different BGA packages. During troubleshooting we have found that some of the balls in the corners of the BGA's are separated from the underside of the package. The PWA is approx 10�x10� and the components vary fr
Electronics Forum | Mon Mar 13 04:37:13 EST 2006 | Daniel
Hi Experts, We have requirement from our customer to control the PCBA flatness at 10 mils diagonally. Weird but this is the requirement due to the need for some through hole pins (spreaded acroos the board must touch the copper sheet while they are
Electronics Forum | Sat Jan 19 10:56:26 EST 2008 | slthomas
Dave that's actually what I want to work on the next time we run these. Our issue with these right now is that weight distribution on the boards mandates that we break a 4-up panel into two pieces and run it 90 degrees to the ideal orientation (=s wh
Electronics Forum | Mon Mar 10 20:14:20 EDT 2008 | davef
We'd be unhappy with features that are not in copper that is at the same level as the component pads, because of difficulties the fabricator would have in maintaining registration between the copper pads and the ink used for the features not in coppe
Electronics Forum | Fri Jan 18 14:24:07 EST 2013 | davef
Here's the story: * Solder will melt and alloy with the solder alloy that you have in the pot. * Flux will smoke, smell and leave schmutz floating on the surface of the solder in the pot. While the amount of smoke, smell and schmutz are variables, b
Electronics Forum | Thu Aug 09 09:14:22 EDT 2018 | ks0707
Is there any special machines/equipment which are able to install FBGA parts on the very thin flex boards for Printing, Pick & Place, and Reflow ? Q2> Is there any Fixture house who can offer fixtures to enable SMT processes for those assemblies ? Q
Electronics Forum | Thu Aug 09 16:24:27 EDT 2018 | ks0707
Hi Thomas, Thank you for your posting and I agree with you that Printing is the most difficult one. BTW, after you ran the one side (let's say Bottom side), my engineer worries about the distortion of flex board because of the thickness. In that ca
Electronics Forum | Thu Aug 09 16:51:39 EDT 2018 | tey422
A good set of fixtures are what you need to get it done right. Since we are in the same area, I would recommend give ATD (Advance Tooling Design)a try, they located in San Jose. We been using fixtures from them for years. We build thousands of Fle
Electronics Forum | Fri Aug 10 16:01:51 EDT 2018 | ks0707
Hi Thomas, Thank you for your advice. BTW, unfortunately, I received negative answer from the Fixture house same as below. =========== We have an issue here. Your board is too thin. It is fine to make the fixture for first side. But when you run
Electronics Forum | Tue May 21 15:00:28 EDT 2019 | emeto
Hello Greg, Here are a few questions and advises that might post an answer: 1. How thick is your current stencil and what is the part that requires that thickness? 2. Can you use a carrier to keep your board straight and avoid board warpage? May
