Stencil Aperture Checker
Compare circular or rectangular stencil apertures against your assembly limits.
Live results
| Measurement | Result |
|---|
Formula and worked example
Method. Rectangular area ratio = LW/[2t(L + W)]. Circular area ratio = D/(4t). Aspect ratio = narrowest opening dimension / t.
Assumptions. Use as a straight-wall aperture screen. Assembly limits depend on paste, stencil, coating and process. Confirm with your assembler.
Example. A 0.30 × 0.60 mm aperture in a 0.10 mm stencil has an area ratio of 1 and aspect ratio of 3.