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{{Image|Planar Schottky diode.PNG|right|250px|Planar Schottky diode with ''n<sup>+</sup>''-guard ring and tapered oxide.}}
{{Image|Planar Schottky diode.PNG|right|250px|Planar Schottky diode with ''n<sup>+</sup>''-guard rings and tapered oxide.}}
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==Schottky diode==
==Schottky diode==

Revision as of 13:16, 29 January 2011

(PD) Image: John R. Brews
Planar Schottky diode with n+-guard rings and tapered oxide.

Schottky diode

The Schottky diode is a two-terminal device consisting of conductive gate (for example, a metal) on top of a semiconductor body. A generic name for this structure is the metal-semiconductor diode or M/S diode.[1] For low voltage applications, below 200V, silicon is used, but for higher voltages (up to 3000 V or more) silicon carbide is used to extend the breakdown voltage. These voltages are achievable only when edge breakdown is avoided, which requires special attention to edge termination designs.[2] The figure shows three strategies toward increasing the edge breakdown voltage: an extension of the metal diode contact over a tapered oxide and also an n+-guard ring and a floating guard ring. These strategies are sometimes used together, but also are used separately. The substrate contact is made through an ohmic contact to the p-substrate made using a metal-to-p+ region on the surface of the diode.

Notes

  1. ↑ The term "Schottky diode" may be taken erroneously to refer to diffusion as the mechanism of operation as first proposed by Mott, Schottky and Davydov. However, the mechanism in most devices is thermionic emission, as later proposed by Bethe. See Chih-Tang Sah (1991). “§560: Metal/semiconductor diode”, Fundamentals of solid-state electronics. World Scientific, p. 474. ISBN 9810206372. 
  2. ↑ B. Jayant Baliga (2005). “§3.2 Schottky diode edge terminations”, Silicon carbide power devices. World Scientific, pp. 44 ff. ISBN 9812566058. 

http://books.google.com/books?id=LNLVwAzhN7EC&pg=PA45&dq=%22Schottky+diode%22&hl=en&ei=iAg6TeO7AYSasAOk67WhAw&sa=X&oi=book_result&ct=result&resnum=9&ved=0CGcQ6AEwCA#v=onepage&q=%22Schottky%20diode%22&f=false

http://books.google.com/books?id=FPlJQ0iO7oQC&pg=PA134&dq="Schottky+diode"&hl=en&ei=iAg6TeO7AYSasAOk67WhAw&sa=X&oi=book_result&ct=result&resnum=8&ved=0CGIQ6AEwBw#v=onepage&q="Schottky diode"&f=false

http://books.google.com/books?id=sh94bLWOTY4C&pg=PA84&dq=%22Schottky+diode%22&hl=en&ei=iAg6TeO7AYSasAOk67WhAw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CDwQ6AEwAA#v=onepage&q=%22Schottky%20diode%22&f=false

http://books.google.com/books?id=GTM2i6ZFpIEC&pg=PA299&dq=%22Schottky+diode%22&hl=en&ei=Afc6TZXzL5G6sQPaoYidAw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CDIQ6AEwADgK#v=onepage&q=%22Schottky%20diode%22&f=false

http://books.google.com/books?id=pRFUZdHb688C&pg=PA245&dq=%22Schottky+diode%22&hl=en&ei=Afc6TZXzL5G6sQPaoYidAw&sa=X&oi=book_result&ct=result&resnum=4&ved=0CEMQ6AEwAzgK#v=onepage&q=%22Schottky%20diode%22&f=false

http://books.google.com/books?id=7WKOfUR-8M4C&pg=PA227&dq=%22Schottky+diode%22&hl=en&ei=tvg6TbqyCIjQsAOTsbTVAw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CDAQ6AEwADgU#v=onepage&q=%22Schottky%20diode%22&f=false

http://books.google.com/books?id=XrSI2C9NlDIC&pg=PA47&dq=%22Schottky+diode%22&hl=en&ei=tvg6TbqyCIjQsAOTsbTVAw&sa=X&oi=book_result&ct=result&resnum=9&ved=0CFwQ6AEwCDgU#v=onepage&q=%22Schottky%20diode%22&f=false

http://books.google.com/books?id=REQkwBF4cVoC&pg=PA599&dq=%22Schottky+diode%22&hl=en&ei=YQM7TedHjsSwA-Tj4fwC&sa=X&oi=book_result&ct=result&resnum=3&ved=0CEAQ6AEwAjge#v=onepage&q=%22Schottky%20diode%22&f=false

http://onlinelibrary.wiley.com/doi/10.1002/1521-4095%2820020605%2914:11%3C789::AID-ADMA789%3E3.0.CO;2-H/pdf

http://books.google.com/books?id=iMSnDxI7JNsC&pg=PA181&dq=%22Schottky+diode%22&hl=en&ei=wkg7TdJ-jKKwA96_3IsD&sa=X&oi=book_result&ct=result&resnum=8&ved=0CFkQ6AEwBzgy#v=onepage&q=%22Schottky%20diode%22&f=false

http://books.google.com/books?id=LNLVwAzhN7EC&pg=PA50&dq=%22guard+ring%22+%22edge+termination%22&hl=en&ei=7ks7TeGTMI-ssAPipv3ZAw&sa=X&oi=book_result&ct=result&resnum=3&ved=0CEYQ6AEwAg#v=onepage&q=%22guard%20ring%22%20%22edge%20termination%22&f=false

Compare pn diode and Schottky diode for speed and breakdown

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