Herbapos;s bipolar transistors
Brar, B.; Sullivan, G.J.; Asbeck, P.M.
Electron Devices, IEEE Transactions on
Volume 48, Issue 11, Nov 2001 Page(s):2473 - 2476
Digital Object Identifier   10.1109/16.960370
Summary:The profound influence of Herbert Kroemer's ideas on the development of high-performance bipolar transistors is described. The historical context and subsequent development of innovations such as the drift base, achieved through concentration gradients and later with semiconductor bandgap grading, the use of wide bandgap emitters, concepts of collector-up transistors, and the introduction of new heterojunction materials, are reviewed

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