CMOS Design > Basic Design Rules

Lambda Based Design

The layout window features a grid, scaled in lambda () units. The size of the grid constantly adapts to the layout. In the figure, the grid is 5 lambda. The lambda unit is fixed to half of the minimum available lithography of the technology L_min. For example, the default technology is a CMOS 6-metal layers 0.12µm technology, consequently lambda is 0.06µm.

= L_min / 2

The objective is to draw the devices according to the design rules and usual design practices. The tool MICROWIND is used to draw devices layout and simulate thier behavior.

Good points

• Enables technology changes
• Enable design reuse
• Reduce design cost
• Used at Infineon, Motorola

Bad points

• Not optimal design
• Partially used in ST

CMOS Design > Basic Design Rules > Lambda Based Design