Semiconductor Glossary, Developed Semi OneSource.

Check out the new weBLOG!

With over 2000 terms defined and explained, Semiconductor Glossary is the most complete reference in the field of semiconductors on the market today.

Including some 500 new terms defined and remaining terms updated and modified, a 2nd edition book version of this glossary is now available.

Search For Term

Term (Index) Definition
ohmic contact  metal-semiconductor contact with very low resistance independent of applied voltage (may be represented by constant resistance); to form an "ohmic" contact metal and semiconductor must be selected such that there is no potential barrier formed at the interface (or potential barrier is so thin that charge carriers can readily tunnel through it).
rectifying contact  metal-semiconductor contact displaying asymmetric current-voltage characteristics, i.e. allowing high current to flow across under the forward bias condition and blocking current off under the reverse bias; this behavior is controlled by the bias voltage dependent changes of the potential barrier height in the contact region.
work function difference  defines characteristics of contact between two materials featuring different work function; for conductor-semiconductor contact w.f.d. determines height of potential barrier in the contact plane, and hence, determines whether contact is ohmic or rectifying.
metal-semiconductor contact   key component of any semiconductor device; depending on materials involvced in the contact its properties can differ drastically; ohmic contact (linear, symetric current-voltage characteristic)in the case when work function of metal nmatches work function of semiconductor (no potential barrier at the interface); rectifying contact(non-linear, highly asymetric, diode-like current-voltage characteristic) in the case when work function of metal differs from the work function of semiconductor (potential barrier at the interface)- commonly referred to as a Schottky diode.
Hit Count=

Back To Top! 

Back To Home!

Hit Count=
Created and operated by J. Ruzyllo. Copyright J. Ruzyllo 2001-2016. All rights reserved.

Information in this glossary is provided at the author's discretion. Any liability based on, or related to the contents of this glossary is disclaimed.