Stencil Area Ratio Calculator

Enter values of aperture width, length, stencil thickness to calculate the stencil ratio with our basic and advanced Stencil Area Ratio Calculator

The Stencil Area ratio calculator is important in the field of manufacturing and electronics where the accuracy of stencil area determines the quality of product.

Formula:

The Stencil Area Ratio (SAR) Calculator uses a simple formula:

$SAR = \frac{2 \times (L + W) \times T}{L \times W}$

V $SAR = \frac{2 \times (L + W) \times T}{L \times W}$ ariables:

SAR (Stencil Area Ratio): This is like a special number that tells us how the stencil area compares to the edges of the openings. We measure it in millimeters.
L (Length of the Aperture): It’s how long the opening in the stencil is, measured in millimeters.
W (Width of the Aperture): It’s how wide the opening in the stencil is, also measured in millimeters.
T (Thickness of the Stencil): This is how thick the stencil material is, measured in millimeters.

How to Calculate ?

Following are the key steps;

Calculate Aperture Area: Multiply the length (L) by the width (W), then divide by
Calculate Perimeter: Add the length and width, then multiply by 2 (
Calculate Stencil Area Ratio: Divide the aperture area by the product from step 2.

Solved Calculations:

Example 1:

Given:

Length of the aperture (L) = 5 mm
Width of the aperture (W) = 3 mm
Thickness of the stencil (T) = 0.2 mm

Calculation	Instructions
Step 1: SAR = $\frac{(L \times W)}{2 \times (L + W) \times T}$	Start with the formula.
Step 2: SAR = $\frac{(5 \times 3)}{2 \times (5 + 3) \times 0.2}$	Replace L with 5 mm, W with 3 mm, and T with 0.2 mm.
Step 3: SAR = $\frac{15}{2 \times 8 \times 0.2}$	Multiply the length by the width and add L and W together.
Step 4: SAR = $\frac{15}{3.2}$	Multiply the sum by 2 and then by the thickness.
Step 5: SAR = 4.69	Divide the aperture area by the product to get the Stencil Area Ratio.

Answer:
The Stencil Area Ratio is 4.69.

Example 2:

Given:

Length of the aperture (L) = 8 mm
Width of the aperture (W) = 4 mm
Thickness of the stencil (T) = 0.3 mm

Calculation	Instructions
Step 1: SAR = $\frac{(L \times W)}{2 \times (L + W) \times T}$	Start with the formula.
Step 2: SAR = $\frac{(8 \times 4)}{2 \times (8 + 4) \times 0.3}$	Replace L with 8 mm, W with 4 mm, and T with 0.3 mm.
Step 3: SAR = $\frac{32}{2 \times 12 \times 0.3}$	Multiply the length by the width and add L and W together.
Step 4: SAR = $\frac{32}{7.2}$	Multiply the sum by 2 and then by the thickness.
Step 5: SAR = 4.44	Divide the aperture area by the product to get the Stencil Area Ratio.

Answer:
The Stencil Area Ratio is 4.44.

What is the Stencil Area Ratio Calculator?

The Stencil Area Ratio (SAR) Calculator helps to know the efficiency of a stencil in the printing process, especially in the field of electronics manufacturing. It is therefore an important factor that influences the quality of solder paste deposition, which in turns, directly impacts the reliability of electronic assemblies.

A higher SAR generally shows the better paste release from the stencil, that leads to more accurate and reliable printing results. It is important for an optimized stencil design and to ensure the quality of production.

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