Chapter II: BASIC EDITING

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Changing Size

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To change the size of a node, select it and issue the Size command of the Edit menu. One corner of the node will remain fixed while the opposite corner stretches to the cursor. When any button is clicked, the node changes size.

To change the size of an arc, follow similar procedures. Select the arc and issue the Size command. Note that the arc stretches about its center so that an edge is at the cursor location. Click a button to make the change.

Another way to change size is to select the node or arc and use the Get Info command of the Info menu. Type new X and Y sizes into the dialog for nodes; type a new Width into the dialog for arcs. Note that the size in question is the size of the highlighted area. Thus a typical MOS transistor has a highlighted area (where diffusion and polysilicon cross) of 2x2, even though the component is 6x6 if you include the four overlap regions sticking out. A CMOS diffusion arc shows highlighting only on its diffusion area, even though the complete arc has implant regions that are much larger. Also note that the X and Y sizes of a node will be swapped if the node is rotated onto its side. Note that the default unit for typed values is lambda, unless another unit is explicitly mentioned (see the Change Units... command of the Technology menu for more on lambda and units.
Figure 2.2


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