Junction transistor
A junction transistor is an early form of construction of a bipolar transistor , in English as the junction transistor will be referred to. In contrast to the first practically realized tip transistor ("point contact transistor"), the emitter and collector areas are not contacted and formed by placing two metal tips, but have flat contact surfaces for the three semiconductor zones (base, emitter and collector).
The first junction transistor was described by Shockley as early as 1948, but was only put into practice after the first tip transistor, and was a drawn transistor made of germanium . The manufacturing concept of the flat transistor had quickly established itself, also because numerous modifications and further improvements enable bipolar transistors with better properties. The alloy and diffusion transistors should be mentioned in particular . The bipolar transistor in planar technology and epitaxial transistors followed later . From a practical point of view, almost all of today's bipolar transistors can be assigned to the group of flat transistors.
Individual evidence
- ↑ Martin Kulp: Tube and transistor circuits: transistor technology . Vandenhoeck & Ruprecht, 1970, p. 443 ff. & 553 ff .
- ^ Bo Lojek: History of Semiconductor Engineering . Springer, Berlin 2007, ISBN 978-3-540-34257-1 , Grown Junction and Diffused Transistors , pp. 41 ff .