History of Transistor

in this video we will have a look at the history of transistors and how they evolved. Transistors were initially made as amplification elements used in analog circuits.
Later they could build integrated circuits where we use planar process to fabricate several billions of transistors on the same chip.
This caused a switch in application of transistors from the amplification element in analog circuits to switch element in digital circuits.
We also look at the current trends in transistor fabrication which is decreasing the transistor size as much as possible.
This allows us to have more transistors on the same chip with lower power consumption per transistor.