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Chapter 6 Using P-Cells 1. Purpose of P-Cell P-Cell stands for parameterized cell. Cells that only vary in parameters can be grouped with the concept of P-Cell and thus significantly reduce work load. The single OTFT device symbols that we use in Chapter 2 can also be viewed as a P-Cell, since by specifying parameters, various devices can be obtained. P-Cells can be very useful in layout design. If two devices are different only in parameters, it would be much more efficient to generate the second device based on the first one, instead of designing from scratch. So the basic concept of P-Cell is: first, create a reference layout for a single type of device; then specify parameters, and the software will stretch the reference layout according to the parameter difference. Thus, devices with various parameters can be generated with little effort, which significantly improve design efficiency. OPDK User Manual, Release 2014.3 55
