Electronics Forum | Mon Feb 22 12:04:15 EST 1999 | Dave F
| Please could you suggest a recommended aperture sizes for | printing of smd adhesives. Any recommendations on stencil thickness as well as stencil finish will be appreciated. | Mark: About the only rule of printing adhesives is: Keep it off the
Electronics Forum | Fri Oct 04 11:34:42 EDT 2002 | Bob Willis
Some additional comments from a paper may be of interest. Baking Printed Circuit Boards - Why and How Baking printed boards prior to conventional and surface mount assembly should not be necessary. Often boards are baked for historical reasons; in
Electronics Forum | Wed Oct 22 06:06:54 EDT 2008 | stanyserrao
1CA64011 and 1CAFE011 UsedBy Display 1CA??011 Cause The Vision_type in part data is expressed using hexadecimal notation ("??"). If "??" equals 1E, 64, 78, 79, AC, or FE then boundary detection could not begin because the nozzle was bent.
Electronics Forum | Thu Jan 13 15:19:51 EST 2000 | Dave F
Hey Jack: It's certainly "do-able." Conformal coating adhesion testing was done as part of the "Evaluation of Low Residue Soldering for Military and Commercial Applications: A Report from the Low Residue Soldering Task Force," published by Sandia Na
Electronics Forum | Fri Apr 02 02:01:24 EST 1999 | P.L. Sorenson - Technical Consultant
| | | Has anyone heard of a problem with catastrophic failure of | | | large value (200uF) solid tantulum capacitors that have been | | | exsposed to high humdity. | | | | | I suppose that with water moisture seep in the capacitor, the risk is ver
Electronics Forum | Thu Nov 19 11:06:40 EST 1998 | Earl Moon
| We have some PCB�s in our warehouse in Manaus - Brazil. They are stored for more than 2 years , in a condition of 25 degrees centigrades and a humidity ranging from 60% to 90%. | Do these conditions cause the PCB�s to deteriorate over time? If so ,
Electronics Forum | Fri Jan 29 05:14:06 EST 1999 | Graham Naisbitt
Hi guys, I really am at a loss to understand this one. It would appear that there may be some reaction between the flux and the resist? Or maybe you have an OSP on the board that is reacting during soldering? As a fast fix, maybe you should try a
Electronics Forum | Thu Sep 19 11:14:45 EDT 2002 | Jim M.
We had lots of problems with bridging on 15.8mm pitch, QFP17-160 at the start.The board was .032 thick, double sided-six boards to a panel. Here is the problems (not neccessarily in the biggest to little but as i remember them) and solutions that he
Electronics Forum | Thu Oct 08 22:06:44 EDT 1998 | Eric R
| | | Does sombbody know what DPM rate a good and reliable SMT assembly line (incl. solder paste print, assembly and feflow soldering) has? | | | DPM is Defects per million, usually measured on components. We run a process consisting of small to medi
Electronics Forum | Wed Oct 07 06:19:30 EDT 1998 | Charles Stringer
| | | Does sombbody know what DPM rate a good and reliable SMT assembly line (incl. solder paste print, assembly and feflow soldering) has? | | | DPM is Defects per million, usually measured on components. We run a process consisting of small to medi
