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Chapter 6 Determining Cell Size
56 Click on the upper right hand corner of the metal polygon on this level and
drag your mouse over two cells and down three. Release the mouse.
A via polygon connecting the airbridge to the beginning of the spiral is added to
your circuit as shown below. Note that the first via polygon does not have metal
in the middle but this one does. A via polygon has metalization in a one cell thick
wall around the perimeter. The second via polygon is only two cells wide so that
there is no space in the middle.
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