Types of Cell

There are different types of cells used in order to meet the physical design requirements. I have tried to list the down some important cells which will come across frequently

1. Well Tap Cells
2. End Cap Cells
3. Decap cells
4. Spare cells
5. Tie Cells
6. Filler cells

Special cells are required for implementing a Multi-Voltage design.

1. Level Shifter
2. Isolation Cell
3. Enable Level Shifter
4. Retention Flops
5. Always ON cells
6. Power Gating Switches/MTCMOS switch