Electronics Forum | Wed Feb 23 16:25:33 EST 2000 | John
We are using a glue and wave solder process for primarily chip components. Our products do not use any fine pitch components. What would an acceptable benchmark for the placement defect rate be? 50 DPMO? 100 DPMO? 200 DPMO? Thanks in advance,
Electronics Forum | Wed Feb 23 16:25:33 EST 2000 | John
We are using a glue and wave solder process for primarily chip components. Our products do not use any fine pitch components. What would an acceptable benchmark for the placement defect rate be? 50 DPMO? 100 DPMO? 200 DPMO? Thanks in advance,
Electronics Forum | Thu Aug 24 13:09:30 EDT 2000 | Dr. Ning-Cheng Lee
Yes, a flux with a fast wetting rate will be more prone to have spattering. Fluxes with high boiling point solvents are also more prone to have spattering, if the same flux is fast in wetting rate.
Electronics Forum | Mon Oct 05 03:17:32 EDT 1998 | Christoph Prem
Does sombbody know what DPM rate a good and reliable SMT assembly line (incl. solder paste print, assembly and feflow soldering) has?
Electronics Forum | Thu Jul 25 06:14:21 EDT 2002 | matherat
Defect rate is a variable that is hard to evaluate from company to company. Look into solid solder deposit which will eliminate smd scrap/defects all together, no matter who assembles it. http://www.sipad.com mk
Electronics Forum | Fri Aug 02 21:50:24 EDT 2002 | ralugg
I am trying to find the Medical specification or rating for components used in the assmbly of a PCB / level 2 and 3. also is there suppliers who speialize in these components.
Electronics Forum | Wed Nov 06 05:37:19 EST 2002 | Dreamsniper
Hi Peter, DaveF is correct...you can't just rate them without specific purpose or knowing what you really need. What about Samsung.......Suzuki........
Electronics Forum | Fri Jan 10 09:30:55 EST 2003 | russ
Does anyone know what the voltage ratings on ceramic caps is related to? Would it be safe to use a 50V cap instead of 25V for .01uF X7R bypass/filter caps? Thanks Russ
Electronics Forum | Tue Jan 14 11:30:33 EST 2003 | jsherrow
You may find that the higher volatage rated parts are thicker. Same footpring but "taller". Usually not a problem unless the board is inserted into a mold. BTDT.
Electronics Forum | Thu Mar 27 12:25:14 EST 2003 | kenlchin
additonally, minimizing the rising rate aroud 183'c and decrease the droping rate(near 0.8'c/s) is also a good way .
