Methods of forming SiC MOSFETs with high inversion layer...

Semiconductor device manufacturing: process – Coating of substrate containing semiconductor region or of... – By reaction with substrate

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C438S212000, C438S765000, C257SE21055

Reexamination Certificate

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07727904

ABSTRACT:
Methods of forming an oxide layer on silicon carbide include thermally growing an oxide layer on a layer of silicon carbide, and annealing the oxide layer in an environment containing NO at a temperature greater than 1175° C. The oxide layer may be annealed in NO in a silicon carbide tube that may be coated with silicon carbide. To form the oxide layer, a preliminary oxide layer may be thermally grown on a silicon carbide layer in dry O2, and the preliminary oxide layer may be re-oxidized in wet O2.

REFERENCES:
patent: 3924024 (1975-12-01), Naber et al.
patent: 4069058 (1978-01-01), Washburn
patent: 4466172 (1984-08-01), Batra
patent: 4875083 (1989-10-01), Palmour
patent: 5030600 (1991-07-01), Hida et al.
patent: 5114887 (1992-05-01), Sekine et al.
patent: 5170231 (1992-12-01), Fujii et al.
patent: 5170455 (1992-12-01), Goossen et al.
patent: 5184199 (1993-02-01), Fujii et al.
patent: 5479316 (1995-12-01), Smrtic et al.
patent: 5506421 (1996-04-01), Palmour et al.
patent: 5510630 (1996-04-01), Agarwal
patent: 5554204 (1996-09-01), Kotaka et al.
patent: 5587870 (1996-12-01), Anderson et al.
patent: 5726463 (1998-03-01), Brown et al.
patent: 5739564 (1998-04-01), Kosa et al.
patent: 5763905 (1998-06-01), Harris
patent: 5837572 (1998-11-01), Gardner et al.
patent: 5877045 (1999-03-01), Kapoor
patent: 5885870 (1999-03-01), Maiti et al.
patent: 5939763 (1999-08-01), Hao et al.
patent: 5960289 (1999-09-01), Tsui et al.
patent: 5972801 (1999-10-01), Lipkin et al.
patent: 6025608 (2000-02-01), Harris et al.
patent: 6028012 (2000-02-01), Wang
patent: 6048766 (2000-04-01), Gardner et al.
patent: 6054352 (2000-04-01), Ueno
patent: 6063698 (2000-05-01), Tseng et al.
patent: 6096607 (2000-08-01), Ueno
patent: 6100169 (2000-08-01), Suvorov et al.
patent: 6107142 (2000-08-01), Suvorov et al.
patent: 6117735 (2000-09-01), Ueno
patent: 6136728 (2000-10-01), Wang
patent: 6165822 (2000-12-01), Okuno et al.
patent: 6171905 (2001-01-01), Morita et al.
patent: 6190973 (2001-02-01), Berg et al.
patent: 6204203 (2001-03-01), Narwanker et al.
patent: 6211035 (2001-04-01), Moise et al.
patent: 6221700 (2001-04-01), Okuno et al.
patent: 6228720 (2001-05-01), Kitabatake et al.
patent: 6238967 (2001-05-01), Shiho et al.
patent: 6239463 (2001-05-01), Williams et al.
patent: 6246076 (2001-06-01), Lipkin et al.
patent: 6261976 (2001-07-01), Dong
patent: 6297172 (2001-10-01), Kashiwagi
patent: 6316791 (2001-11-01), Schorner et al.
patent: 6342748 (2002-01-01), Nakamura et al.
patent: 6344663 (2002-02-01), Slater, Jr. et al.
patent: 6444542 (2002-09-01), Moise et al.
patent: 6455892 (2002-09-01), Okuno et al.
patent: 6524877 (2003-02-01), Nakazawa et al.
patent: 6559068 (2003-05-01), Alok et al.
patent: 6593620 (2003-07-01), Hshieh et al.
patent: 6600138 (2003-07-01), Hauf et al.
patent: 6610366 (2003-08-01), Lipkin
patent: 6632747 (2003-10-01), Niimi et al.
patent: 6707011 (2004-03-01), Tay et al.
patent: 6767843 (2004-07-01), Lipkin et al.
patent: 7022378 (2006-04-01), Das et al.
patent: 7067176 (2006-06-01), Das et al.
patent: 2002/0102358 (2002-08-01), Das et al.
patent: 2002/0172774 (2002-11-01), Lipkin
patent: 2003/0143863 (2003-07-01), Chen et al.
patent: 2004/0219800 (2004-11-01), Tognetti
patent: 2006/0030163 (2006-02-01), Vaartstra
patent: 1478302 (2004-02-01), None
patent: 1531744 (2004-09-01), None
patent: 1606140 (2005-04-01), None
patent: 198 09 554 (1998-09-01), None
patent: 19900171 (2000-12-01), None
patent: 10036208 (2002-02-01), None
patent: 0 637 069 (1995-02-01), None
patent: 0 637 069 (2001-01-01), None
patent: 1 523 032 (2005-04-01), None
patent: 64-008633 (1989-01-01), None
patent: 03-157974 (1991-07-01), None
patent: 06-232402 (1994-08-01), None
patent: 7-221038 (1995-08-01), None
patent: 07221038 (1995-08-01), None
patent: 08-264766 (1996-10-01), None
patent: 09-205202 (1997-08-01), None
patent: 11-191559 (1999-07-01), None
patent: 11-238742 (1999-08-01), None
patent: 11-261061 (1999-09-01), None
patent: 11-266017 (1999-09-01), None
patent: 11-274487 (1999-10-01), None
patent: 2000-049167 (2000-02-01), None
patent: 2000-082812 (2000-03-01), None
patent: 2000-252461 (2000-09-01), None
patent: 2001-060067 (2001-03-01), None
patent: 2000-106371 (2001-04-01), None
patent: WO 97/17730 (1997-05-01), None
patent: WO 97/39485 (1997-10-01), None
patent: WO 98/02924 (1998-01-01), None
patent: WO 99/63591 (1999-12-01), None
patent: WO 00/13236 (2000-03-01), None
patent: WO 03/003435 (2003-01-01), None
Chung et al. “Improved Inversion Channel Mobility for 4H-SiC MOSFETs Following High Temperature Anneals in Nitric Oxide”IEEE Electron Device Letters 22(4)176-178 (2001).
International Search Report and Written Opinion for PCT/US2006/035285; date of mailing Jan. 22, 2007.
Matin et al. “A Self-Aligned Process for High-Voltage, Short-Channel Vertical DMOSFETs in 4H-SiC”IEEE Transactions on Electron Devices 51(10):1721-1725 (2004).
McDonald et al. “Comparison of nitrogen incorporation in SiO2/SiC and SiO2/Si structures”Applied Physics Letters 76(5):568-570 (2000).
Ryu et al. “Design and Process Issues for Silicon Carbide Power DiMOSFETS”Mat. Res. Soc. Symp. 640:H4.5.1-H4.5.6 (2001).
Yano et al. “High Temperature NO Annealing of Deposited SiO2and SiON Films on N-type 4H-SiC”Materials Science Forum 483-485:685-688 (2005).
Bhatnagar et al. “Comparison of 6H-SiC, 3C-SiC, and Si for Power Devices”IEE Transactions on Electron Devices, vol. 40(3), Mar. 1993.
Chung et al. “Improved Inversion Channel Mobility for 4H-SiC MOSFETs Following High Temperature Anneals in Nitric Oxide”IEEE Electron Device Lettersvol. 22(4), Apr. 2001.
Chung, G.Y. et al, “Improved Inversion Channel Mobility for 4H-SiC MOSFETs Following High Temperature Anneals in Nitric Oxide”, IEEE Electron Device Letters, 22:4, pp. 176-178 (Apr. 2001).
McDonald, K. et al., “Comparison of nitrogen incorporation in SiO2/SiC and SiO2/Si structures”, Applied Physics letters, 76:5, pp. 568-570 (Jan. 31, 2000).
A.K. Agarwal, J.B. Casady, L.B. Rowland, W.F. Valek, and C.D. Brandt, “1400 V 4H-SiC Power MOSFET's;” Materials Science Forum vols. 264-268, pp. 989-992, 1998.
A.K. Agarwal, J.B. Casady, L.B. Rowland, W.F. Valek, M.H. White, and C.D. Brandt, “1.1 kV 4H-SiC Power UMOSFET's,”IEEE Electron Device Letters, vol. 18, No. 12, pp. 586-588, Dec. 1997.
A.K. Agarwal, N.S. Saks, S.S. Mani, V.S. Hegde and P.A. Sanger, “Investigation of Lateral RESURF, 6H-SiC MOSFETs,”Materials Science Forum, vols. 338-342, pp. 1307-1310, 2000.
A.K. Agarwal, S. Seshadri, and L. B. Rowland, “Temperature Dependence of Fowler-Nordheim Current in 6H-and 4H-SiC MOS Capacitors.”IEEE Electron Device Letters, vol. 18, No. 12, Dec. 1997, pp. 592-594.
A.V. Suvorov, L.A. Lipkin, G.M. Johnson, R. Singh and J.W. Palmour, “4H-SiC Self-Aligned Implant-Diffused Structure for Power DMOSFETs,”Materials Science Forumvols. 338-342, pp. 1275-1278, 2000.
Agarwal et al. “A Critical Look at the Performance Advantages and Limitations of 4H-SiC Power UMOSFET Structures,”1996 IEEE ISPSD and IC's Proc., May 20-23, 1996, pp. 119-122.
Agarwal et al. “Temperature Dependence of Fowler-Nordheim Current in 6H-and 4H-SiC MOS Capacitors,”IEEE Electron Device Letters. vol. 18, No. 12, Dec. 1997, pp. 592-594.
Chakraborty et al. “Interface Properties of N2O-annealed SiO2/SiC system,”Proceedings IEEE Hong Kong Electron Devices Meeting. Jun. 24, 2000, pp. 108-111.
Chang et al. “Observation of a Non-stoichiometric Layer at the Silicon Dioxide—Silicon Carbide Interface: Effect of Oxidation Temperature and Post-Oxidation Processing Conditions,”Mat. Res. Soc. Symp. Proc.vol. 640, 2001.
Chung et al., “Effects of Anneals in Ammonia on the Interface Trap Density Near the Band Edges in 4H-Silicon Carbide Metal-Oxide-Semiconductor Capacitors”,Applied Physics Letters, vol. 77, No. 22, Nov. 27, 2000, pp. 3601-3603.
Cho et al. “Improvement of charge t

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