R. Okojie

Most-cited papers

1. High-temperature electronics - a role for wide bandgap semiconductors?

   P. Neudeck, R. Okojie, Liang-Yu Chen

   2002Proceedings of the IEEE974 citations

   Semantic Scholar

   Save

2. Observation of 4H–SiC to 3C–SiC polytypic transformation during oxidation

   R. Okojie, Ming Xhang, P. Pirouz, S. Tumakha +2 more

   2001152 citations

   Semantic Scholar

   Save

3. Stable Electrical Operation of 6H–SiC JFETs and ICs for Thousands of Hours at 500 $^{\circ}\hbox{C}$

   P. Neudeck, D. Spry, Liang-Yu Chen, G. Beheim +7 more

   2008IEEE Electron Device Letters128 citations

   Semantic Scholar

   Save

4. Operation of α(6H)-SiC pressure sensor at 500 °C

   R. Okojie, A. Ned, A. Kurtz

   1998120 citations

   Semantic Scholar

   Save

5. 4H-SiC Piezoresistive Pressure Sensors at 800 °C With Observed Sensitivity Recovery

   R. Okojie, D. Lukco, V. Nguyen, E. Savrun

   2015IEEE Electron Device Letters100 citations

   Semantic Scholar

   Save

6. Simulation, fabrication and testing of bulk micromachined 6H-SiC high-g piezoresistive accelerometers

   A. R. Atwell, R. Okojie, K. Kornegay, S. Roberson +1 more

   200392 citations

   Semantic Scholar

   Save

7. Characterization of highly doped n- and p-type 6H-SiC piezoresistors

   R. Okojie, A. Ned, A. Kurtz, W. Carr

   199884 citations

   Semantic Scholar

   Save

8. Reliability assessment of Ti/TaSi2/Pt ohmic contacts on SiC after 1000 h at 600 °C

   R. Okojie, D. Lukco, Yuan Chen, D. Spry

   200278 citations

   Semantic Scholar

   Save

9. Development and application of high-temperature sensors and electronics for propulsion applications

   G. Hunter, J. Wrbanek, R. Okojie, P. Neudeck +4 more

   2006SPIE Defense + Commercial Sensing60 citations

   Semantic Scholar

   Save

10. Harsh environment microtechnologies for NASA and terrestrial applications

    T. George, K. Son, R. A. Powers, L. Del Castillo +1 more

    2005Italian National Conference on Sensors57 citations

    Semantic Scholar

    Save

11. An Overview of High-Temperature Electronics and Sensor Development at NASA Glenn Research Center

    G. Hunter, P. Neudeck, R. Okojie, G. Beheim +2 more

    200355 citations

    Semantic Scholar

    Save

12. 6H-SiC pressure sensor operation at 600/spl deg/C

    A. A. Ned, R. Okojie, A. Kurtz

    19981998 Fourth International High Temperature Electronics Conference. HITEC (Cat. No.98EX145)54 citations

    Semantic Scholar

    Save

13. High rate etching of AlN using BCl3/Cl2/Ar inductively coupled plasma

    F. Khan, L. Zhou, Vipan Kumar, I. Adesida +1 more

    200247 citations

    Semantic Scholar

    Save

14. CHARACTERISTICS OF A HERMETIC 6H-SIC PRESSURE SENSOR AT 600°C

    R. Okojie, G. Saad, G. Beheim, E. Savrun

    200138 citations

    Semantic Scholar

    Save

15. Thermal and doping dependence of 4H-SiC polytype transformation

    L. Brillson, S. Tumakha, G. Jessen, R. Okojie +2 more

    200234 citations

    Semantic Scholar

    Save

16. X-RAY DIFFRACTION MEASUREMENT OF DOPING-INDUCED LATTICE MISMATCH IN N-TYPE 4H-SIC EPILAYERS GROWN ON P-TYPE SUBSTRATES

    R. Okojie, T. Holzheu, Xian-Rong Huang, M. Dudley

    200332 citations

    Semantic Scholar

    Save

17. Stable 600°C silicon carbide MEMS pressure transducers

    R. Okojie

    2007SPIE Defense + Commercial Sensing30 citations

    Semantic Scholar

    Save

18. Fabrication and Testing of 6H-SiC JFETs for Prolonged 500 °C Operation in Air Ambient

    D. Spry, P. Neudeck, Liang-Yu Chen, G. Beheim +5 more

    200829 citations Open access

    Semantic Scholar

    Save

19. 4H- to 3C-SiC Polytypic Transformation during Oxidation

    R. Okojie, Ming Xhang, P. Pirouz, S. Tumakha +2 more

    200229 citations Open access

    Semantic Scholar

    Save

20. /spl alpha/(6H)-SiC pressure sensors for high temperature applications

    R. Okojie, Alex A. Ned, A. Kurtz, W. Carr

    1996Proceedings of Ninth International Workshop on Micro Electromechanical Systems29 citations

    Semantic Scholar

    Save

21. A Novel Tungsten–Nickel Alloy Ohmic Contact to SiC at 900 $^{\circ}\hbox{C}$

    R. Okojie, L. Evans, Dorothy Lukco, J. Morris

    2010IEEE Electron Device Letters28 citations

    Semantic Scholar

    Save

22. 6H-SiC Transistor Integrated Circuits Demonstrating Prolonged Operation at 500 C

    P. Neudeck, D. Spry, Liang-Yu Chen, Carl W. Chang +7 more

    200826 citations

    Semantic Scholar

    Save

23. Electrical Operation of 6H-SiC MESFET at 500 °C for 500 Hours in Air Ambient

    D. Spry, P. Neudeck, R. Okojie, Liang-Yu Chen +4 more

    200423 citations

    Semantic Scholar

    Save

24. SiC Field Effect Transistor Technology Demonstrating Prolonged Stable Operation at 500 °C

    P. Neudeck, D. Spry, Liang-Yu Chen, R. Okojie +3 more

    200721 citations Open access

    Semantic Scholar

    Save

25. Prolonged 500 °C Operation of 6H-SiC JFET Integrated Circuitry

    P. Neudeck, D. Spry, Liang-Yu Chen, Carl W. Chang +7 more

    200920 citations Open access

    Semantic Scholar

    Save

26. Simultaneous ohmic contacts to p- and n-type 4H-SiC by phase segregation annealing of co-sputtered Pt-Ti

    R. Okojie, D. Lukco

    201619 citations

    Semantic Scholar

    Save

27. Characterization of tungsten–nickel simultaneous Ohmic contacts to p- and n-type 4H-SiC

    Katherine C. Kragh-Buetow, R. Okojie, D. Lukco, S. Mohney

    201519 citations

    Semantic Scholar

    Save

28. HIGH TEMPERATURE ELECTRONICS , COMMUNICATIONS , AND SUPPORTING TECHNOLOGIES FOR VENUS MISSIONS

    G. Hunter, R. Okojie, P. Neudeck, G. Beheim +4 more

    200719 citations

    Semantic Scholar

    Save

29. Operation of /spl alpha/(6H)-SiC pressure sensor at 500/spl deg/C

    R. Okojie, Alexander A. Ned, A. Kurtz

    1997International Conference on Solid-State Sensors, Actuators and Microsystems19 citations

    Semantic Scholar

    Save

30. Design considerations for bulk micromachined 6H-SiC high-G piezoresistive accelerometers

    R. Okojie, A. R. Atwell, K. Kornegay, S. Roberson +1 more

    2002Technical Digest. MEMS 2002 IEEE International Conference. Fifteenth IEEE International Conference on Micro Electro Mechanical Systems (Cat. No.02CH37266)18 citations

    Semantic Scholar

    Save

31. Chemical Analysis of Materials Exposed to Venus Temperature and Surface Atmosphere

    D. Lukco, D. Spry, Ralph P. Harvey, G. Costa +5 more

    2018Earth and Space Science17 citations Open access

    Semantic Scholar

    Save

32. Failure Mechanisms in MEMS Based Silicon Carbide High Temperature Pressure Sensors

    R. Okojie, P. Nguyen, V. Nguyen, E. Savrun +3 more

    20072007 IEEE International Reliability Physics Symposium Proceedings. 45th Annual17 citations

    Semantic Scholar

    Save

33. Reliability evaluation of direct chip attached silicon carbide pressure transducers

    R. Okojie, Ender Savrun, P. Nguyen, V. Nguyen +1 more

    2004Proceedings of IEEE Sensors, 2004.17 citations

    Semantic Scholar

    Save

34. Electron-excited luminescence of SiC surfaces and interfaces

    L. Brillson, S. Tumakha, R. Okojie, Mei Zhang +1 more

    200417 citations Open access

    Semantic Scholar

    Save

35. Chemically dependent traps and polytypes at Pt'Ti contacts to 4H and 6H-SiC

    S. Tumakha, L. Brillson, G. Jessen, R. Okojie +3 more

    200216 citations

    Semantic Scholar

    Save

36. Stable Ti/TaSi 2 /Pt Ohmic Contacts on N-Type 6H-SiC Epilayer at 600°C in Air

    R. Okojie, D. Spry, Jeffrey C Krotine, C. Salupo +1 more

    200016 citations

    Semantic Scholar

    Save

37. Material System for Packaging 500°C SiC Microsystems

    Liang-Yu Chen, R. Okojie, P. Neudeck, G. Hunter +1 more

    200115 citations

    Semantic Scholar

    Save

38. Improved reliability of SiC pressure sensors for long term high temperature applications

    R. Okojie, V. Nguyen, E. Savrun, D. Lukco

    2011International Solid-State Sensors, Actuators and Microsystems Conference14 citations

    Semantic Scholar

    Save

39. Zero offset drift suppression in SiC pressure sensors at 600 °C

    R. Okojie, Charles A. Blaha, D. Lukco, V. Nguyen +1 more

    2010Italian National Conference on Sensors14 citations Open access

    Semantic Scholar

    Save

40. Electrical characterization of annealed Ti/TiN/Pt contacts on N-type 6H-SiC epilayer

    R. Okojie, A. Ned, A. Kurtz, W. Carr

    199914 citations

    Semantic Scholar

    Save

41. Temperature effects on electrical resistivity of selected ceramics for high‐temperature packaging applications

    Thomas M. Deucher, R. Okojie

    2023Journal of The American Ceramic Society13 citations Open access

    Semantic Scholar

    Save

42. Development of Sic Gas Sensor Systems

    G. Hunter, P. Neudeck, R. Okojie, Glenn M. Beheim +6 more

    200213 citations

    Semantic Scholar

    Save

43. Development of an Extreme High Temperature n-Type Ohmic Contact to Silicon Carbide

    L. Evans, R. Okojie, D. Lukco

    201212 citations Open access

    Semantic Scholar

    Save

44. An Overview of NASA Hypersonic Experimental Diagnostic and Instrumentation Technologies for Ground and Flight Testing

    R. Okojie, P. Danehy, J. Grinstead, A. Watkins +1 more

    200912 citations

    Semantic Scholar

    Save

45. A single crystal SiC plug-and-play high temperature drag force transducer

    R. Okojie, G. Fralick, G. Saad, Charles A. Blaha +2 more

    2003TRANSDUCERS '03. 12th International Conference on Solid-State Sensors, Actuators and Microsystems. Digest of Technical Papers (Cat. No.03TH8664)11 citations

    Semantic Scholar

    Save

46. Reducing DRIE-Induced Trench Effects in SiC Pressure Sensors Using FEA Prediction

    R. Okojie, Carl W. Chang, L. Evans

    2011Journal of microelectromechanical systems10 citations

    Semantic Scholar

    Save

47. Experimental Study of Structural Materials for Prolonged Venus Surface Exploration Missions

    D. Lukco, D. Spry, P. Neudeck, L. Nakley +3 more

    20209 citations

    Semantic Scholar

    Save

48. Demonstration of SiC Pressure Sensors at 750 C

    R. Okojie, D. Lukco, V. Nguyen, E. Savrun

    20149 citations

    Semantic Scholar

    Save

49. High Temperature Dynamic Pressure Measurements Using Silicon Carbide Pressure Sensors

    R. Okojie, R. Meredith, Clarence T. Chang, E. Savrun

    20149 citations Open access

    Semantic Scholar

    Save

50. SiC pressure sensor for detection of combustor thermoacoustic instabilities [aircraft engine applications]

    R. Okojie, J. Delaat, J. Saus

    2005The 13th International Conference on Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05.9 citations

    Semantic Scholar

    Save