laserinfo:pcb_stencils
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laserinfo:pcb_stencils [2009/05/06 20:10] ladyada |
laserinfo:pcb_stencils [2009/05/07 01:45] ladyada |
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| ====== How to make PCB solder paste stencils ====== | ====== How to make PCB solder paste stencils ====== | ||
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| + | Thanks to [[http://ohararp.com/|Ryan O'Hara at Ohararp.com]] for this information, he provides a stencil cutting service and is recommended! | ||
| You'll need: | You'll need: | ||
| - A laser cutter | - A laser cutter | ||
| - | - Kapton film, I like the 1 mil thick 1 ft square sheets from [[McMaster-Carr|http://www.mcmaster.com/#2271K2]] | + | - Kapton film, I like the 2 mil thick 1 ft square sheets from [[http://www.mcmaster.com/#2271K2|McMaster-Carr]] |
| - | - Solder paste such as [[Kester No-Clean|http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=KE1507-ND]] | + | - Solder paste such as [[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=KE1507-ND|Kester No-Clean]] |
| Software: | Software: | ||
| - PCB layout software (well, thats how I do it) - this example will use EagleCAD | - PCB layout software (well, thats how I do it) - this example will use EagleCAD | ||
| - | - [[Pentalogix ViewMate Gerber viewer software|http://www.pentalogix.com/Download/download.html#item8]] | + | - [[http://www.pentalogix.com/Download/download.html|Pentalogix ViewMate Gerber viewer software]] |
| - | - [[PDFCreator|http://sourceforge.net/project/showfiles.php?group_id=57796]] or some other free PDF printer | + | - [[http://sourceforge.net/project/showfiles.php?group_id=57796|PDFCreator]] or some other free PDF printer |
| ===== Create Gerber files of cream layer ===== | ===== Create Gerber files of cream layer ===== | ||
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| Also export the Dimension layer (PCB outline) since that will help a lot in registration | Also export the Dimension layer (PCB outline) since that will help a lot in registration | ||
| - | ===== Import cream Gerber in ViewMate ===== | + | ===== Import cream Gerber in Viewmate ===== |
| - | Start up ViewMate and File>Import>Gerber one of the Gerber files generated | + | Start up Viewmate and File>Import>Gerber one of the Gerber files generated |
| {{:laserinfo:import.gif|}} | {{:laserinfo:import.gif|}} | ||
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| {{:laserinfo:postswell.gif|{{:laserinfo:postswell.gif|}}}} | {{:laserinfo:postswell.gif|{{:laserinfo:postswell.gif|}}}} | ||
| + | ===== Export ===== | ||
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| + | Now we'll export to PDF which will allow for easy importing into Corel Draw. The free version of Viewate doesnt seem to permit exporting, but you can print to PDF which is just as good. | ||
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| + | {{:laserinfo:pdfprint.gif|}} | ||
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| + | ===== Cut! ===== | ||
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| + | Import into Corel Draw and use raster not vector, to burn away the kapton film. For a 35W or 45W epilog, 30% speed and 100% power at 600 dpi made for a nice clean edge. Be sure to gently rub the stencil with water and a paper towel to get rid of the burnt kapton. | ||
| + | |||
| + | {{:laserinfo:cutstencil.jpg|}} | ||
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| + | I usually use the Dimension layer info to make a jig for silkscreening by cutting out the PCB outline in a 0.062'' (1/16th) clear acrylic sheet | ||
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| + | Here is a LFCSP 16 (4mm on each side) cut out of 2 mil kapton as above | ||
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| + | {{:laserinfo:lfcspkapton.jpg|}} | ||
/home/ladyada/public_html/wiki/data/pages/laserinfo/pcb_stencils.txt · Last modified: 2016/01/28 18:05 (external edit)
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