You can now buy 1200V Schottky diodes - unheard of until quite 
recently.

Silicon Carbide Schottky diodes have lifted the available voltages for 
Schottky diodes by a factor of 5 to 10 times, due to SiC supporting a 
field strength about 10 times higher than Si.

But GaAs Schottky diodes outperform SiC with lower forward voltages 
and faster reverse recovery times.
1.5V forward voltage may not sound marvellous, but it's better than 
can be had in either of the other technologies at the voltage and 
speed ratings involved.

    GaAs:            http://www.ixysrf.com/products/diodes.html


Cree Schottky (and other) masters strut their stuff with
1200V 5A SiC Schottky diode

        http://www.cree.com/products/pdf/C2D05120.C.pdf

Range of Cree high voltage, high current SiC parts

    http://www.cree.com/products/power_docs2.asp

BUT when you click on the 1200V 50A chip link it says (in pretty 
packing)
"Contact Schottky chip sales"

        http://www.cree.com/products/power_chip_sales.htm


SiC Schottky overview.

    http://www.afrlhorizons.com/Briefs/Dec02/PR0205.html

NASA report on characterisation of SiC devices at high temperature and 
comparison with Si

    Look at overview first

    Overview 
http://gltrs.grc.nasa.gov/cgi-bin/GLTRS/browse.pl?2004/TM-2004-213336.html
    Report 
http://gltrs.grc.nasa.gov/reports/2004/TM-2004-213336.pdf
                                Lots of pretty graphs :-)

Example Infineon 600V SiC Schottky's
2A to 2 x 8A parts listed here.

        http://www.infineon.com/cms/en/product/technology/designlink/2007-2/c_power/j_600schottky.html



Excellent tutorial on Metal-Semiconductor junction technology (= 
Schottky diode enabling principle)


        http://www.mtmi.vu.lt/pfk/funkc_dariniai/diod/schottky.htm

IEEE synopsis of paper "Comparison of SiC and GaAs Schottky diodes"

        http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel5/7818/21485/00995725.pdf

Abstract. Fabrication of GaAs Schottky diodes

        http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TY5-4C48FSC-1&_user=10&_coverDate=09%2F30%2F2004&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=613618d3a486b623355972068bf5ad0e




        Russell







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