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851. SMD-Stencils Design-Aid  
The stencil thickness shown is rounded down and adjusted to suit the available material thicknesses! The standard thickness is 150μm.  
852. SMD-Stencils Design-Aid - Stencil requirements  
Stencil requirements The quality of the finished assembly is influenced by the SMD-Stencil used. The size of the apertures (openings), and thickness of the stencil determine the amount and shape of…  
853. SMD-Stencils Design-Aid - Stencil thickness  
Stencil thickness For the choice of the stencil thickness (for solder paste), you can adhere to the following guidelines. Decisive is always the smallest component used. The final say should always…  
854. SMD-Stencils Design-Aid  
Type Pitch typical stencil thickness BGA 1,25mm 150µm – 200µm Finepitch BGA 1,00mm 115µm – 135µm Finepitch BGA 0,50mm 75µm – 125µm 0402 125µm – 150µm 0201 75µm –…  
855. SMD-Stencils Design-Aid - Detection by aspect ratio and area ratio  
Detection by aspect ratio and area ratio The calculation of necessary stencil thickness can also be made via aspect ratio and area. Recommended values:  
856. SMD-Stencils Design-Aid  
Type leaded lead-free Aspekt ratio >1,5 >1,7 Area ratio >0,66 >0,8  
857. SMD-Stencils Design-Aid  
The thickness of stencils for adhesive is usually 250µm.  
858. SMD-Stencils Design-Aid - Text on the stencil  
Text on the stencil At Multi-CB the text on the stencil is inclusive. The text can be produced half lasered and lasered through.  
859. SMD-Stencils Design-Aid - Half lasered text  
Half lasered text The SMD-Stencil will be turned for half lasered text, half lasered text is thus on the top side (squeegee side) of the stencil.  
860. SMD-Stencils Design-Aid - Lasered-through text  
Lasered-through text As the half lasered text, also the lasered-through text is cut from the bottom side. You can decide whether the text is readable from the bottom or top side. To ensure best…  
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