Introduction to VLSI Design

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Example: CMOS Inverter Layout

Drawing the P-Diffusion (Active)


Now that we have drawn the NMOS transistor, the next step is to draw the PMOS transistor. The basic steps invloved in drawing the PMOS are the same.

1. Select pactive layer from the LSW

pselect

2. Draw a rectangle 3.6u by 1.2u

You can use the cursor keys and the zoom function to find yourself a place to build the transistor. Make sure you leave enough separation between the NMOS and the PMOS. Note that the PMOS transistor will also be sorrounded by the N-well region.

Draw pactive



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Last Updated by Ilhan Hatirnaz on 11/7/1998