The transistor was invented in 1925 by Julius Edgar Lilienfeld (a FET). The first one built was in 1947 (a BJT). A metal-oxide (MOS) transistor is a FET. Commo

The transistor was invented in 1925 by Julius Edgar Lilienfeld (a FET). The first one built was in 1947 (a BJT). A metal-oxide (MOS) transistor is a FET. Commonly known as MOSFET.