Question

Difference between lambda based design rule and micron based design rule in vlsi

Answer 1

Lambda-based rules: Allow first order scaling by linearizing the resolution of the complete wafer ... To move a design from 4 micron to 2 micron, simply reduce the value of lambda

Answer 2

Answer:

The term VLSI(Very Large Scale Integration) is the process by which IC's

(Integrated Circuits) are made.

There are two basic rules for designing :

* Lambda Based Design Rule

*Micron Based Design Rule.

Lambda-based rules:

Allow first order scaling by linearizing the resolution of the complete wafer implementation.

To move a design from 4 micron to 2 micron, simply reduce the value of lambda.

Worked well for 4 micron processes down to 1.2 micron processes.

However, in general, processes rarely shrink uniformly.

Probably not sufficient for submicron processes.

Micron rules:

List of minimum feature sizes and spacings for all masks, e.g., 3.25 microns for contact-poly-contact (transistor pitch) and 2.75 micron metal 1 contact-to-contact pitch.

Micron rules can result in as much as a 50% size reduction over lambda rules.

Normal style for industry.