Ballistic transport filter and device

Details Ballistic transport filter and device Ballistic transport filter and device

1989-01-27

1989-09-12

Larkins, William D.

357 16, 357 22, 357 34, H01L 29205, H01L 2968

Patent

active

048664880

ABSTRACT:
An energy filter for carriers in semiconductor devices and devices with such filters are disclosed. The filter is a superlattice and the filtering action arises from the subbands and gaps in the conduction and valence bands of the superlattice. A heterojunction bipolar transistor with the filter between the emitter and base has carriers injected from the emitter into the base with energies confined to levels that minimize transit time across the base; a MESFET with a filter between a heterojunction source to channel has carriers injected with energies confined to minimize transit time across the channel. A diode with a filter in front of a drift region limits the spread of energies of injected carriers.

REFERENCES:
patent: 3626328 (1971-12-01), Esaki et al.
patent: 4205329 (1980-05-01), Dingle
patent: 4482910 (1984-11-01), Nishizawa

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