Electronics Forum | Fri Oct 28 14:58:33 EDT 2005 | chunks
Metal stamped tags that are glued on work. http://www.emedco.com can make em'. Even have your company logo on each one. No, I don't work for Emedco, so stop typing.
Electronics Forum | Fri Oct 28 09:27:36 EDT 2005 | russ
havfe you tried all paste manufacturers? Dog ears are usually from a little sticking to the aperture walls. this is usually the result of stencil design and or table seperation speed.
Electronics Forum | Mon Oct 31 03:35:41 EST 2005 | pavel_murtishev
Good day, I simply switched the production from MPM to other printing machine. Defect disappeared. Process parameters and process materials were the same. Stencil was the same. �Dog hides� somewhere in the machine. BR, Pavel
Electronics Forum | Mon Oct 31 09:18:43 EST 2005 | jdengler
If the board is HASL you may always have trouble. Try to reduce the amount of paste by either reducing aperture size of stencil thickness. Jerry
Electronics Forum | Mon Oct 31 22:09:16 EST 2005 | KEN
Why did you choose a 6 mil stencil? How do you plan to rework this device (what machine)? What is the heating method?
Electronics Forum | Tue Nov 01 12:46:23 EST 2005 | chunks
Wow, never heard of this. Hope your board cost isn't too much. Most printers have a kneeding procedure that does this while it prints the board. No waste of any kind when you do this. Conditioning the stencil - must've been in a magazine artile.
Electronics Forum | Fri Nov 11 11:02:23 EST 2005 | russ
i would look at an SPM from MPM(speedline) or an SP200 from Europlacer (speedprint not speedline) We have used both of these machines with great success from 16mil pitch qfps to .5mm pitch uBGAs.
Electronics Forum | Fri Nov 11 12:14:47 EST 2005 | valuems
Hello I would go looking for a SPM with automatic vision or one with manual vision. We know of customers using these machines with no vision doing BGA's. Harry
Electronics Forum | Thu Nov 17 13:51:27 EST 2005 | mnguyen
Never could get that thing to work rite. Better off getting a glue stencil or a manual dispenser. Even if you do get it to work it is difficult to control the glue dot size to stay stable either you get too much or not enough.
Electronics Forum | Tue Dec 06 06:14:38 EST 2005 | bwet
Try using some of those new polyimide stencils. They are 8mils thick and can prevent shorting if it is due to solder mask problems or too much paste. http://www.solder.net/technical/tips.asp BWET
