Pg 8: >"Representing this potential well on a graph makes its triangular nature clear: These wells play a significant role in semi-conductor and transistor de

Pg 8: >"Representing this potential well on a graph makes its triangular nature clear: These wells play a significant role in semi-conductor and transistor design. A noteworthy example is the high-electron-mobility transistor (HEMT) which confines electrons to the triangular well produced when different semi-conducting materials are juxtaposed to create a heterojunction. These electrons have very high mobility (a measure of how fast they can move through a semi-conductor under the influence of an electric field), much greater than the MOSFETs (metal-oxide-semiconductor field-effect transistors) which are conventionally used. HEMTs are used in a lot of high-frequency electronics such as radar equipment, satellite receivers and mobile phones."