What is CMOS VLSI?

What is CMOS VLSI?

–Molecular Electronics? CMOS VLSI is thedigital implementation technology of choice for the foreseeable future (next 10-20 years) –Excellent energy versus delay characteristics –High density of wires and transistors –Monolithic manufacturing of devices and interconnect, cheap!

What are the two types of CMOS circuits?

For every CMOS device, there are essentially two separate circuits: 2) The Pull-Down Network The basic CMOS structure is: A CMOS logic gate must be in one of two states! State 1: PUN is open and PDN is conducting. State 2: PUN is conducting and PDN is open.

What are the basic steps in CMOS fabrication?

6.884 – Spring 2005 2/07/2005 L03 – CMOS Technology 7 Basic CMOS Fabrication Steps Growing silicon dioxide to serve as an insulator between layers deposited on the surface of the silicon wafer. Doping the silicon substrate with acceptor and donor atoms to create p- and n-type diffusions that form isolating PN junctions

How are modern logic chips made?

Modern logic chips fabricated on 20cm (8”) wafers, ~100s chips/wafer. Wafer sawed into separate chips after fabrication. Chips then placed into packages (see packaging lecture later in course)