Electronics Forum | Wed Nov 02 17:49:07 EST 2005 | grantp
Hi, We used a batch oven from Reddish Electronics out of the UK. It was convection, and ok, but had limitations. Batch convection ovens start to heat up, so the metal of the oven is hotter and hotter and it effects the profile. So we ended up need
Electronics Forum | Thu Nov 03 11:23:40 EST 2005 | JeffP
Jay, What are your board sizes? What is the maximum size that you envision reflowing? 10-50 boards a week . . . is that in a single run or broken down into a few boards a day/hour? Do you have a high mix or is it a single product? Are the boards
Electronics Forum | Thu Nov 03 10:49:11 EST 2005 | russ
This is what I would propose, Place and reflow the board without the BGA with your lead process, remove the solder from the BGA pads if you cannot mask off the apertures in your stencil. Then place the BGA and reflow to SAC requirements with a rewo
Electronics Forum | Thu Nov 03 12:52:23 EST 2005 | Amol
the only problem i see here is the neighboring components (depending upon the component density) will surely undergo a second reflow during the rework stage for the BGA. this way the only lead you will have in the BGA assembly is if you are using HA
Electronics Forum | Wed Nov 09 07:16:44 EST 2005 | pjc
Besides IPA, here is a list of links to cleaning agent suppliers besides Zestron, Vigon is a very good cleaning agent: http://www.envirosense.com/ http://www.kyzen.com/ http://www.petroferm.com/ If you give them your material mfr. and part numbe
Electronics Forum | Mon Nov 07 08:27:56 EST 2005 | chunks
It could be you are drying out your solder paste. Most flux formulations are alcohol based and after a few hours can dry out. This can can lead to dewetting and solder balling as well. Especially if you do not homeplate your R's and C's. A simple
Electronics Forum | Fri Nov 11 15:54:48 EST 2005 | Cmiller
We have an SPM with manual vision. Its the best manual printer we have ever had. I believe you can get one used for around 10K. If you buy a realy old one, make sure it has the air table lock!!! I think they only made a few that didnt.
Electronics Forum | Tue Nov 15 09:50:40 EST 2005 | chunks
Good ol'Wenesco. That's one of my old products they have in their advertising. The tricky part about dip process is in the fluxing. Spray fluxing a populated board from the bottom looking up can be a challenge. You'll notice the areas you missed
Electronics Forum | Tue Nov 15 21:06:04 EST 2005 | davef
Is your IMC purple? [The sure way to tell if you have the 'purple plague'.] Where does the failure occur? * At pad / wire bond * Up wire from the bond Tell us about the aluminum pad. * What is the plating specification? Is that what you actually r
Electronics Forum | Thu Nov 17 08:57:39 EST 2005 | russ
No clean and foam fluxing is not a very good process from my experience. I know that the flux manufacturers claim that they are suitable but I am not sure what "suitable" means. I would bet that you have very inconsistant flux coverage. How often