Semiconductor device manufacturing: process – Forming schottky junction – Combined with formation of ohmic contact to semiconductor...
Reexamination Certificate
2006-06-14
2010-06-29
Picardat, Kevin M (Department: 2822)
Semiconductor device manufacturing: process
Forming schottky junction
Combined with formation of ohmic contact to semiconductor...
C438S570000, C438S572000, C438S573000, C438S582000, C438S583000, C438S597000, C438S652000, C438S655000, C438S656000, C438S660000
Reexamination Certificate
active
07745317
ABSTRACT:
A semiconductor device provided with a silicon carbide semiconductor substrate, and an ohmic metal layer joined to one surface of the silicon carbide semiconductor substrate in an ohmic contact and composed of a metal material whose silicide formation free energy and carbide formation free energy respectively take negative values. The ohmic metal layer is composed of, for example, a metal material such as molybdenum, titanium, chromium, manganese, zirconium, tantalum, or tungsten.
REFERENCES:
patent: 4224115 (1980-09-01), Nara et al.
patent: 4990994 (1991-02-01), Furukawa et al.
patent: 5442200 (1995-08-01), Tischler
patent: 5635412 (1997-06-01), Baliga et al.
patent: 5789311 (1998-08-01), Ueno et al.
patent: 6365494 (2002-04-01), Rupp et al.
patent: 6410460 (2002-06-01), Shalish et al.
patent: 6468890 (2002-10-01), Bartsch et al.
patent: 6770912 (2004-08-01), Ota
patent: 2001/0039105 (2001-11-01), Rupp et al.
patent: 2002/0068488 (2002-06-01), Tuller et al.
patent: 199 39 107 (2000-03-01), None
patent: GB 918393 (1963-02-01), None
patent: 0 789 388 (1997-08-01), None
patent: 2000-164528 (2000-06-01), None
patent: 2000-208438 (2000-07-01), None
patent: 2001-53293 (2001-02-01), None
patent: 2004-22796 (2004-01-01), None
patent: WO 00/16382 (2000-03-01), None
“Silicon Carbide Ceramics (SiC)” Shigeyuki Somiya et al, Rohm Co., Ltd., Device Technology Div., Semiconductor R&D Headquarters, Uchida Rokakuho, Sep. 15, 1988, pp. 177-182.
Porter, L. M. et al “A critical review of ohmic and rectifying contacts for silicon carbide” in: Materials Science and Engineering B, Elsevier Sequoia, Lausanne, CH, vol. 34, No. 2 (Nov. 1995), pp. 83-105, XP004000935, ISSN: 0921-5107.
Held, R. et al “SiC Merged p-n/Schottky Rectifiers for High Voltage Applications” in: Materials Science Forum, Aedermannsfdorf, CH, vol. 264-268, No. Part 2 (1998), pp. 1057-1060, XP000944900, ISSN:0255-5476.
Hara, S. et al “Control of Schottky and ohmic interfaces by unpinning Fermi level” in: Applied Surface Science, Elsevier, Amsterdam, NL, vol. 117/118 (1997), pp. 394-399, XP000749905, ISSN: 0169-4332.
Edmond, J. A. et al “Electrical Contacts to Beta Silicon Carbide Thin Films” in: Journal Of The Electrochemical Society, Electrochemical Society. Manchester, New Hampshire, US, vol. 135, No. 2 (Feb. 1988), pp. 359-362, XP000979375, ISSN:0013-4651.
Office Action issued on Apr. 15, 2008 for European Patent Application No. 03 007 082.5 which is corresponding to the present U.S. patent application.
Matsushita Masashi
Okamura Yuji
Au Bac H
Picardat Kevin M
Rabin & Berdo PC
Rohm & Co., Ltd.
LandOfFree
Semiconductor device and method of manufacturing the same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Semiconductor device and method of manufacturing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor device and method of manufacturing the same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4224028