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Creating and Modifying ‘Mask Layouts’ for Sensor Designs

Please refer to the ‘mask layouts’ of our sensor designs as a starting point. They have been provided as image templates.

1. Decide on the largest and/or most common/prevalent resolution \(\lambda_{\,\textsf{macro}\,}\) expected for the mask layout. For example, 1 mm for most design features.
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2. Estimate the bounding size of the mask layout. For example, layout height \(H_{\,\textsf{layout}}\) = sensor width = 25 mm, layout width \(W_{\,\textsf{layout}}\) = sensor length = 45 mm.
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3. Using image editing software, create an image of height \(H_{\,\textsf{layout}}\,/\,\lambda_{\,\textsf{macro}\,}\) pixels and width \(W_{\,\textsf{layout}}\,/\,\lambda_{\,\textsf{macro}\,}\) pixels. Set its image resolution to \(1\,/\,\lambda_{\,\textsf{macro}\,}\) pixels, for reference. Keep in mind the software units. For example:

   
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4. Enable the pixel grid and rulers, if available. Using the grid will make the mask layout easier to draw.

   
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5. On a pixel scale, create the largest design features (of resolution \(\lambda_{\,\textsf{macro}\,}\), that is) first. For example:

   
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6. Resize the image to be of height \(H_{\,\textsf{layout}}\,/\,\lambda_{\,\textsf{micro}\,}\) pixels and width \(W_{\,\textsf{layout}}\,/\,\lambda_{\,\textsf{micro}\,}\) pixels, where \(\lambda_{\,\textsf{micro}\,}\) is the smallest underlying resolution. Update its image resolution to \(1\,/\,\lambda_{\,\textsf{micro}\,}\) pixels, for reference, again. Keep in mind the software units. Use the nearest neighbor resampling method and maintain the aspect ratio. For example:

   
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7. On the new pixel scale, create the smallest design features (of resolution \(\lambda_{\,\textsf{micro}\,}\), that is). For example:

   
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Tip: Use named image layers (as analogous to SolidWorks features). For example:

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