Christoph Hollenstein

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Related publications (58)

High Voltage Pulsed DBD Effects on the Aerodynamic Performances and on the Shock Buffet

Christoph Hollenstein, Peter Ott, Pénélope Leyland, Philip Peschke

The applications of surface dielectric barrier discharge plasma actuators, (DBD), have known a considerable interest recently in the field of flow control. In general, such actuators consist of two electrodes separated by an insulation covering the lower e ...

2013

Plasma deposition in an ideal showerhead reactor: a two-dimensional analytical solution

Christoph Hollenstein, Alan Howling, Boris Legradic, Michaël Chesaux

The interplay of gas flow and depletion by plasma dissociation determines the spatial distribution of species and the deposition uniformity in a plasma source. Many plasma reactors use a gas showerhead and the design of the flow dynamics is a critical aspe ...

2012

Plasma generation by inductive coupling with a planar resonant RF network antenna

Christoph Hollenstein, Alan Howling, Philippe Frédérique Bruno Guittienne, Sylvain Lecoultre

A planar antenna operating at 13.56MHz is presented for potential applications in plasma processing. It consists of interconnected elementary resonant meshes composed of inductive and capacitive elements. Due to its structure, the antenna exhibits a set of ...

2012

Resonant planar antenna as an inductive plasma source

Christoph Hollenstein, Alan Howling, Philippe Frédérique Bruno Guittienne, Sylvain Lecoultre

A resonant planar antenna as an inductive plasma source operating at 13.56 MHz inside a low pressure vacuum vessel is presented for potential plasma processing applications. Its principle consists in interconnecting elementary resonant meshes composed of i ...

2012

Plasma Jet-Substrate Interaction in Low Pressure Plasma Spray-CVD Processes

Christoph Hollenstein, Philippe Frédérique Bruno Guittienne, Malko Gindrat

Conventional equipment for plasma spraying can be adapted for operation at low pressure so that PECVD-like processing can be performed. The plasma jet generated by the torch is characterized by a high convective velocity and a high gas temperature. The inf ...

Springer US2012

Plasma generation by inductive coupling with a planar resonant RF network antenna (vol 45, 082001, 2012)

Christoph Hollenstein, Alan Howling, Philippe Frédérique Bruno Guittienne, Sylvain Lecoultre

Iop Publishing Ltd2012

Plasma Spray-CVD: A New Thermal Spray Process to Produce Thin Films from Liquid or Gaseous Precursors

Christoph Hollenstein, Malko Gindrat, Philippe Frédérique Bruno Guittienne

New dedicated coating processes which are based on the well-known LPPS (TM) technology but operating at lower work pressure (100 Pa) are being actively developed. These hybrid technologies contribute to improve the efficiencies in the turbine industry such ...

2011

Influence of Argon and Nitrogen Admixture in HMDSO/O-2 Plasmas onto Powder Formation

Christoph Hollenstein, Marina Ricci

In situ Fourier transform infrared spectroscopy was used to study the powder formation of hexamethyldisiloxane/O-2 plasmas. The spectra show that oxygen plays an important role at the beginning of the process. A large amount of oxygen is responsible for in ...

2011

Input silane concentration effect on the a-Si:H to uc-Si:H transition width

Christophe Ballif, Christoph Hollenstein, Grégory Bugnon, Andrea Feltrin, Benjamin Strahm, Fanny Sculati-Meillaud

In this work the microstructure transition width from amorphous to microcrystalline silicon is discussed. It is shown that the width of the transition depends on the input silane concentration level and indirectly on the silane depletion level. The higher ...

2010

Hydrogen-dominated plasma, due to silane depletion, for microcrystalline silicon deposition

Christoph Hollenstein, Alan Howling, Raffaello Sobbia

Plasma conditions for microcrystalline silicon deposition generally require a high flux of atomic hydrogen, relative to SiH alpha=0 -> 3 radicals, on the growing film. The necessary dominant partial pressure of hydrogen in the plasma is conventionally obta ...

American Vacuum Society2010

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