Some keywords!-part1

The origin of this terminology can be traced as the logical extension to the integration techniques namely the Small Scale Integration, SSI (the ICs which functioned as logic gates, flip-flops), the Medium Scale Integration, MSI (multiplexers, decoders)., the Large Scale Integration LSI (early microprocessors, small memories, PAL, GAL

The advances in the integration techniques can be attributed directly to :
•Advances in photolithography techniques
•New designs of semiconductor devices
•Newer methods of metallization

The development of integration technology has followed the famous Moore’s Law. It was stated by Gordon Moore, co-founder of Intel, in the year 1965, that “the number of transistors per chip would grow exponentially (double every 18 months)”. In fact the doubling period has shortened to a mere 12 months!

Some keywords in VLSI

•Very-large-scale-integration (VLSI) is defined as a technology that allows the construction and interconnection of large numbers (millions) of transistors on a single integrated circuit.

•Integrated circuit is a collection of one or more gates fabricated on a single silicon chip.

•Wafer is a thin slice of semiconductor material on which semiconductor devices are made. Also called a slice or substrate.

•Chip is a small piece of semiconductor material upon which miniaturized electronic circuits can be built.

•Die is an individual circuit or subsystem that is one of several identical chips that are produced after dicing up a wafer.