Electronics Forum | Fri Mar 04 11:00:37 EST 2005 | mrduckmann2000
Anybody have any ideas on the proper way to screen solder mask onto a PCB? I am going to cover SMT parts that were soldered to the btm side of the PCB, now I have to mask them in order to run this animal through the wave solder process. I know it w
Electronics Forum | Wed Feb 23 21:24:42 EST 2000 | Dave F
Chris: Whatever way you decide to define your pads, use the same type on the component and the board. Non-solder mask defined pad advantages: � No point-of-stress concentration at edge mask and solder ball � No CTE mismatch at edge mask and solder
Electronics Forum | Wed Feb 23 21:24:42 EST 2000 | Dave F
Chris: Whatever way you decide to define your pads, use the same type on the component and the board. Non-solder mask defined pad advantages: � No point-of-stress concentration at edge mask and solder ball � No CTE mismatch at edge mask and solder
Electronics Forum | Mon Mar 15 16:07:32 EST 1999 | Earl Moon
| | After rmoving a BGA (plastic)to correct unexplained shorts | | I installed another BGA using flux only. | | Checking on an X Ray machine and found two shorts. | | | | can anyone give a good explenation ? | | | | Thanks | | | | Ron | | | Ron,
Electronics Forum | Fri Mar 04 13:19:43 EST 2005 | Slow Ride
I would use a spot solder machine. If not, why not spray the mask onto the board? Use a Camalot machine or something similar. Using a stencil over placed components wil yield a thick mask - right? That's why I'd spray.
Electronics Forum | Wed Mar 16 16:02:55 EST 2005 | Dreamsniper
Hi, Need your help. Easy one. How do you evaluate Spot-on Mask, those that are peelable and used for wave soldering and conformal coating? thanks and regards,
Electronics Forum | Fri Feb 02 12:37:11 EST 2007 | kennyg
For pads such as a d-pack... what is the effect on heat dissipation of leaving the unsoldered portion of the pad exposed metal or covering with solder mask? Is there a percentage of heat dissipation that is inhibited by covering with mask?
Electronics Forum | Thu Feb 14 12:44:48 EST 2008 | operator
Don't worry about the paste print. Just omit it from the stencil. Mask over all the SMT components after reflow with water washable WSOL masking. Then run it thru the wave to deposit the solder. Then wash to remove masking. Or you could manually run
Electronics Forum | Thu Mar 17 09:22:55 EST 2005 | davef
J-STD-001, Appendix C, Material and Process Compatibility Testing
Electronics Forum | Thu Feb 22 08:26:10 EST 2007 | davef
Try: * http://www.peters.de * http://www.atotech.com/peelable-solder-mask.html
