Tools/Solder Paste Calculator

Solder Paste Calculator

Stencil aperture design & paste release analysis

Input Parameters

Stencil: 0.12mm

Paste on Pad

Analysis Results

excellent Paste Release

Optimal paste release expected. Standard process.

Aperture Size

1 × 0.5 mm

Area Ratio

1.39

Target: ≥0.66

Aspect Ratio

4.17

Target: ≥1.5

Paste Volume

0.06 mm³

Actual Deposit

0.051 mm³

85% transfer

Min Aperture Width

0.18 mm

For aspect ratio ≥1.5

Recommended stencil for chip: 0.1-0.15mm (typical 0.12mm)

IPC-7525 Guidelines

Area Ratio

≥0.66 for reliable release

= Aperture Area / Wall Area

Aspect Ratio

≥1.5 for good paste deposit

= Width / Thickness

Stencil Thickness Guide

0201/010050.08mm
0402/BGA0.10mm
0603/08050.12mm
1206+0.15mm

Tips

  • • Nano-coating improves release by 10-15%
  • • Electroformed stencils for fine-pitch
  • • Step stencil for mixed components
  • • Trapezoidal walls improve release

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