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Step 2Align layers
The next step is to cut out the top layer and bottom layers, and to place a small loop of scotch tape on one corner of the top layer to allow you to tape the top and bottom layers together once they are aligned. You want to cut the top piece smaller than the bottom so that you can stick the top to the bottom. Leave some room around the edge of the design so that no copper will be visible. See pic.
Now, take the two paper pieces with the top and bottom layers printed on them and go to a window or patio door. It needs to be daytime since you will be using the backlight from outside to see through the paper. Place the bottom layer on the glass, and then taking care not to stick the top piece down yet, align the two paper sheets using the alignment marks, your vias, features or other method. When aligned, stick the top to the bottom. Carefully lift another corner of the top piece and add another roll of tape to keep the layers aligned. The key is to make sure the tape will not interfere with the copper board being placed between the sheets. See pic.
Now, take the two paper pieces with the top and bottom layers printed on them and go to a window or patio door. It needs to be daytime since you will be using the backlight from outside to see through the paper. Place the bottom layer on the glass, and then taking care not to stick the top piece down yet, align the two paper sheets using the alignment marks, your vias, features or other method. When aligned, stick the top to the bottom. Carefully lift another corner of the top piece and add another roll of tape to keep the layers aligned. The key is to make sure the tape will not interfere with the copper board being placed between the sheets. See pic.
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