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17 Result(s)

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  1. No Access

    Article

    Selective deposition of diamond films

    Polycrystalline diamond films have been selectively deposited on a silicon surface. A novel process was developed which exposes a patterned, scratch damaged silicon area, surrounded by SiO2, to a high pressure mi...

    J. L. Davidson, C. Ellis, R. Ramesham in Journal of Electronic Materials (1989)

  2. No Access

    Article

    Low Temperature Synthesis of Polycrystalline Diamond by Microwave Plasma-Enhanced Chemical Vapor Deposition

    Polycrystalline diamond thin films have been deposited on single crystal silicon substrates at low temperatures (<950°C) using a mixture of methane and hydrogen gases by high pressure microwave plasma assisted...

    R. Ramesham, C. Ellis, T. Roppel, D.A. Jaworske, W. Baugh in MRS Online Proceedings Library (1990)

  3. No Access

    Article

    Selective Growth of Poly-Diamond Thin Films Using Selective Damaging by Ultrasonic Agitation on a Variety of Substrates

    Polycrystalline diamond thin films have been selectively deposited on Si, SiO2, Si3 N4, Ta, Mo, alumina, and sapphire substrates using selective damaging by ultrasonic agitation. Novel processes were developed to...

    R. Ramesham, T. Roppel, C. Ellis in MRS Online Proceedings Library (1991)

  4. No Access

    Article

    Selective Growth of Polycrystalline Diamond Thin Films

    Microwave plasma assisted CVD is employed to grow diamond films using a gas mixture of H2 and CH4on various substrates. Diamond has a tendency not to nucleate growth on mirror-smooth finished substrates irrespect...

    R. Ramesham in MRS Online Proceedings Library (1992)

  5. No Access

    Article

    Selective Nucleation of Diamond Crystals on the Apex of Silicon Pyramids

    Diamond crystals have been selectively grown on the apex of anisotropically chemically etched silicon pyramids. A novel process sequence is developed which exposes patterned sharp apex of silicon pyramids surr...

    R. Ramesham, C. Ellis in MRS Online Proceedings Library (1992)

  6. No Access

    Article

    Effect of Oxygen on the Textured Diamond Growth over Nickel Substrates

    Microwave plasma has been used to grow diamond films using CH4 and H2 over nickel substrates. Nucleation of the diamond has been achieved by manual scratching and ultrasonic agitation of the substrates. The subst...

    R. Ramesham, M. F. Rose, R. F. Askew, M. Bozack in MRS Online Proceedings Library (1994)

  7. No Access

    Article

    Adhesion and Young’s Modulus of CVD Diamond Thin Films Grown Over Various Substrates

    Diamond films were deposited by microwave plasma CVD using H2 and CH4 gas mixture over various substrate materials such as Si, Pd, Be, Cu, Mo, AIN, SiO2, Si3N4, Al2O3, Sapphire, Quartz, Ni-base alloys, single cry...

    R. Ramesham, R. F. Askew, M. F. Rose in MRS Online Proceedings Library (1995)

  8. No Access

    Article

    Growth of diamond at the atmospheric pressure of hydrogen and methane by a hot-filament technique

    R. Ramesham, M. F. Rose, R. F. Askew, R. Myres in Journal of Materials Science Letters (1996)

  9. No Access

    Article

    Diamond Growth on (a) Large Mo Cylinders at 30 Torr and (b) Flat Mo at One Atmospheric Pressure of H2 and CH4

    (a) Polycrystalline diamond films have been grown on cylindrical Mo substrates by hot filament and microwave plasma CVD techniques using a gas mixture of hydrogen and methane. A single hot tungsten filament has b...

    R. Ramesham, M. F. Rose in MRS Online Proceedings Library (1996)

  10. No Access

    Article

    Plasma Etching and Patterning of CVD Diamond at <100° for Microelectronics Application

    Oxidation resistance of diamond is an important characteristic to be considered in many high temperature microelectronics and other applications. We have tested the stability of CVD diamong by exposing to Grou...

    R. Ramesham, W. Welch, W. C. Neely, M. F. Rose… in MRS Online Proceedings Library (1996)

  11. No Access

    Article

    Growth of chemical vapour deposition diamond on large molybdenum cylinders for crossed-field amplifier applications

    R. Ramesham, M. F. Rose, R. F. Askew in Journal of Materials Science Letters (1996)

  12. No Access

    Article

    AC and DC Polarization and Cyclic Voltammetric Behavior of Boron-Doped CVD Diamond in 0.5M NaCl Solution

    Boron-doped diamond has been deposited over a Mo substrate by microwave plasma CVD using methane and hydrogen. Boron do** of diamond has been achieved in situ by using a solid boron source while growing the ...

    R. Ramesham, M. F. Rose in MRS Online Proceedings Library (1996)

  13. No Access

    Article

    Characterization of hypervelocity impact craters on chemical vapour-deposited diamond and diamond-like carbon films

    Microwave plasma chemical vapour-deposited (CVD) process has been used to grow polycrystalline diamond films over silicon substrates. Diamond-like carbon (DLC) thin films were grown over silicon substrates usi...

    R RAMESHAM, S BEST, M. F ROSE, M CRUMPLER in Journal of Materials Science (1997)

  14. No Access

    Article

    Synthetic single-crystal, homoepitaxially grown, CVD diamond capacitor

    Homoepitaxially grown diamond film capacitor has been fabricated and tested for capacitance characteristics. Type IIa diamond was chosen for carbon ion implantation and subsequently microwave plasma CVD diamon...

    R RAMESHAM, P. E PEHRSSON, T. I SMITH… in Journal of Materials Science: Materials in… (1997)

  15. No Access

    Article

    Kinetic studies of hydroquinone_quinone at the boron-doped diamond electrode by cyclic voltammetry

    Abstracts are not published in this journal

    R. RAMESHAM, M. F. ROSE in Journal of Materials Science Letters (1997)

  16. No Access

    Article

    Kinetic studies of hydroquinone/quinone at the boron-doped diamond electrode by cyclic voltammetry

    R. RAMESHAM, M. F. ROSE in Journal of Materials Science Letters (1997)

  17. No Access

    Article

    Differential pulse voltammetry of toxic metal ions at the boron-doped CVD diamond electrode

    Boron-doped polycrystalline diamond films were grown over a molybdenum substrate by a microwave plasma CVD process using a methane and hydrogen gas mixture at a pressure of 35 ± 1 Torr. Boron do** of diamond...

    R. Ramesham in Journal of Materials Science (1999)