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Online calculation - SMD-Stencils
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Stencil Thickness
LeitOnFix
LeitOnFix-stencils have A4 size. You can add more options and order in express 1-working day lead times.LeitOnFix for special fixture frame
This stencil equals LeitOnFix but its outer shape is not straight. The outline prevents the stencil from being put into the special fixture frame wrongly. This special fixture frame can be ordered separately to be inserted into any standard system. The LeitOnFix stencil can then be fixed with some tape (note: you may have to use less pressure during the tin-printing process!).Do only choose "LeitOnFix stencils for fixture frame", if you already possess a fixture frame. When ordering a special fixture frame, please identify your stencil system so that we can produce the frame accordingly.
LeitOnSparFix
The word "spar" is a short form of "saving money"! This stencil allows no additional options and cannot be produced for the fixture frame. It is only available in 8 working days and has a maximum free pad quantity of 1500.Stencil Thickness
Based on IPC-7525A the following recommendations for stencil thicknesses can be made:
| Component | Pitch [mm] | Recommended Stencil Thickness [µm] | |
|---|---|---|---|
| brushed (standard) | incl. Nano-finishing | ||
| PLCC | 1,25 | 150 - 250 | 150 - 250 |
| QFP | 0,65 | 150 - 175 | 150 - 200 |
| QFP | 0,50 | 125 - 150 | 150 -180 |
| QFP | 0,40 | 100 - 125 | 120 - 150 |
| QFP | 0,30 | 75 - 125 | 100 - 125 |
| 0402 | 125 - 150 | 125 - 180 | |
| 0201 | 75 - 125 | 100 - 150 | |
| 01005 | 63 - 89 | 75 - 100 | |
| BGA | 1,25 | 150 - 200 | 150 - 200 |
| Finepitch BGA | 1,00 | 115 - 135 | 120 - 150 |
| Finepitch BGA | 0,50 | 75 - 125 | 100 - 150 |
Note: the smallest pitch is most relevant.
Note regarding working days
Working days are Monday to Friday, excluding German public holidays or on our website explicitly announced closing days. The actual working day counts for orders that are placed prior to 8:30am.
Surface finishing
- Electropolishing on board side for better release behavior.
- Nano-coating on the coating knife side for fewer cleaning cycles.
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Attention!
The following options have been adjusted for production reasons and are highlighted in color:
The following options have been adjusted for production reasons and are highlighted in color: