摘要:
A CVD single crystal diamond material suitable for use in, or as, an optical device or element. It is suitable for use in a wide range of optical applications such as, for example, optical windows, laser windows, optical reflectors, optical refractors and gratings, and etalons. The CVD diamond material is produced by a CVD method in the presence of a controlled low level of nitrogen to control the development of crystal defects and thus achieve a diamond material having key characteristics for optical applications.
摘要:
A method for integrating wide-gap semiconductors, and specifically, gallium nitride epilayers, with synthetic diamond substrates is disclosed. Diamond substrates are created by depositing synthetic diamond onto a nucleating layer deposited or formed on a layered structure that comprises at least one layer of gallium nitride. Methods for manufacturing GaN-on-diamond wafers with low bow and high crystalline quality are disclosed along with preferred choices for manufacturing GaN-on-diamond wafers and chips tailored to specific applications.
摘要:
A microwave plasma reactor for manufacturing synthetic diamond material via chemical vapour deposition, the microwave plasma reactor comprising: a plasma chamber defining a resonant cavity for supporting a primary microwave resonance mode having a primary microwave resonance mode frequency f; a plurality of microwave sources coupled to the plasma chamber for generating and feeding microwaves having a total microwave power Ρτ into the plasma chamber; a gas flow system for feeding process gases into the plasma chamber and removing them therefrom; and a substrate holder disposed in the plasma chamber and comprising a supporting surface for supporting a substrate on which the synthetic diamond material is to be deposited in use, wherein the plurality of microwave sources are configured to couple at least 30% of the total microwave power Ρτ into the plasma chamber in the primary microwave resonance mode frequency f, and wherein at least some of the plurality of microwave sources are solid state microwave sources.
摘要:
Die Erfindung betrifft ein Beschichtungsanlage (1), enthaltend zumindest einen evakuierbaren Rezipienten (10), zumindest einen Substrathalter (40), welcher zur Aufnahme eines Substrates (4) vorgesehen ist, zumindest eine Gaszufuhreinrichtung, mittels welcher zumindest ein gasförmiger Prekursor in den Rezipienten (10) einleitbar ist und zumindest eine Plasmaerzeugungseinrichtung (2), welche dazu eingerichtet ist, den Precursor zumindest teilweise zu ionisieren, wobei der Substrathalter (40) verschiebbar ist, so dass dieser von einer Arbeitsposition in eine Ruheposition bringbar ist. Weiterhin betrifft die Erfindung ein Verfahren zur Beschichtung eines Substrates, bei welchem das Substrat (4) mit einem Substrathalter (40) in einen evakuierbaren Rezipienten (10) eingebracht wird, mit zumindest einer Gaszufuhreinrichtung zumindest ein gasförmiger Prekursor in den Rezipienten (10) eingeleitet wird und mit zumindest einer Plasmaerzeugungseinrichtung (2) der Precursor zumindest teilweise ionisiert wird, wobei das Plasma (25) gezündet wird, so lange sich der Substrathalter (40) mit dem Substrat (4) in einer Ruheposition befindet und der Substrathalter (40) nach einer vorgebbaren Zeitspanne in eine Arbeitsposition bewegt wird
摘要:
A method of producing a synthetic diamond is disclosed, the method comprising chemical vapour deposition (CVD) of methane and hydrogen, wherein the methane is obtained by reacting carbon dioxide with water or hydrogen, and the hydrogen is obtained by electrolysis of water.
摘要:
A single crystal CVD synthetic diamond product comprising: a flat base; a tip; sloped side walls extending between the flat base and the tip; and a thickness from the flat base to the tip of at least 1.3mm, wherein the flat base forms a plane which lies within 20 o of a {110} crystallographic plane, and wherein dislocation defects extend through the single crystal CVD synthetic diamond product in a direction from the flat base to the tip with an average direction of the dislocation defects lying within 20 o of a direction perpendicular to the plane of the flat base.
摘要:
A single crystal CVD diamond component comprising: a surface, wherein at least a portion of said surface is formed of as-grown growth face single crystal CVD diamond material which has not been polished or etched and which has a surface roughness R a of no more than 100 nm; and a layer of NV - defects, said layer of NV - defects being disposed within 1 μm of the surface, said layer of NV - defects having a thickness of no more than 500 nm, and said layer of NV - defects having a concentration of NV - defects of at least 10 5 NV - /cm 2 .