Electronics Forum | Tue Jan 16 07:02:47 EST 2001 | You Kim Huat
HI, Can someone advice me, is there any guideline to determince the opening for stencil during stencil fabrication. Also is there any method to determince whether the solder paste amount is enough during this process.
Electronics Forum | Tue Jan 16 07:07:03 EST 2001 | You Kim Huat
HI, Can someone advice me, is there any guideline to determince the opening for stencil during stencil fabrication. Also is there any method to determince whether the solder paste amount is enough during this process.
Electronics Forum | Tue Jan 16 21:00:11 EST 2001 | davef
Two good sources of information are: 1 IPC-7525 Stencil Design Guidelines 2 SMTnet fine Archives [once the guys get them back up and running after the conversion is complete]
Electronics Forum | Wed Jan 17 03:06:56 EST 2001 | George English
You can try : Optimum pad design and solder joint shape for reliability. written for the NPL(England) by Milos Dusek and Chis Hunt, (good ol' English names !!) or of course the IPC guidelines IPC-7525 Regards G
Electronics Forum | Tue Jan 16 09:23:26 EST 2001 | P.Gerits
Hello, Standard way to calculate stencil design can be done as follows: A normal ratio of aperture width/stencil thickness = 1.5 for pitches below 650u A normal ratio of stencil aperture width against pad width = 0.8-0.9 (or stencil aperture 10%-20
Electronics Forum | Tue May 05 20:21:31 EDT 2015 | bhaskar
i need a menthod for calculating amount of solder paste need in a single pcb or a lot of pcb(1000 pcb). i need reduce wastage of solder paste in the process , so any one can help........
Electronics Forum | Thu May 07 02:16:45 EDT 2015 | buckcho
i need a menthod for calculating amount of > solder paste need in a single pcb or a lot of > pcb(1000 pcb). i need reduce wastage of solder > paste in the process , so any one can > help........ Hello, you can measure the weight, before the pas
Electronics Forum | Sun May 10 01:20:07 EDT 2015 | bhaskar
Thank u sir for your idea. Practically it gave very good result..
Electronics Forum | Tue May 05 21:38:40 EDT 2015 | kahrpr
Get an accurate scale. You can rent them if you do not have one or do not want to buy one. Weigh the bare board then paste the board and re-weigh it. Subtract the 2 and you have the weight. solder paste is sold buy weight so then you can calculate th
Electronics Forum | Sat Nov 21 16:23:05 EST 2009 | davef
Patrick I can only agree with you about low residue (alcohol based) fluxes, providing you apply the amount specified by the supplier. Amounts in excess of the specified amount can have harmful effects.
