Element Six Technologies Limited

Other

Element Six Gmbh

Gersan Establishment

Philip Maurice Martineau

Daniel James Twitchen

Geoffrey Alan Scarsbrook

Andrew John Whitehead

Herman Philip Godfried

Clive Edward Hall

Evert Pieter Houwman

Ian Friel

John Lloyd Collins

Michael Andrew Cooper

Bärbel Susanne Charlotte Dorn

Wilhelmus Gertruda Maria Nelissen

Barbel Susanne Dorn

Paul Martyn Spear

Ricardo Simon Sussmann

Rizwan Uddin Ahmad Khan

Barbel Susanne Charlotte Dorn

Martin P Smith

Christopher M Welbourn

Martin Cooper

Harpreet Kaur Dhillon

Andrew Michael Bennett

James Gordon Smith

Stephen David Williams

Rizwan Uddin Khan

Neil Perkins

Sarah Louise Geoghegan

Michael Peter Gaukroger

Michael Cooper

Nicholas Matthew Davies

Keith Barry Guy

Robert Charles Burns

Grant Charles Summerton

John Olaf Hansen

Simon Craig Lawson

Timothy Patrick Gerard Addison

Helen Jennifer Gallon

Wilhemus Gertruda Maria Nelissen

Ricardo Simon Sussman

Andrew Michael Cooper

Wilhelmus Gertruda Nelissen

Bärbel Susanne Cha Dorn

A coloured single crystal CVD synthetic diamond material comprising: a plurality of layers, wherein the plurality of layers includes at least two sets of layers which differ in terms of their defect composition and colour, wherein defect type, defect concentration, and layer thickness for each of the at least two sets of layers is such that if the coloured single crystal CVD diamond material is fabricated into a round brilliant cut diamond comprising a table and a culet, and having a table to culet depth greater than 1 mm, the round brilliant cut diamond comprises a uniform colour as viewed by naked human eye under standard ambient viewing conditions in at least a direction through the table to the culet.

Single crystal chemical vapor deposited synthetic diamond materials having uniform color

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.

Optical quality diamond material

The present disclosure relates to methods for synthesizing synthetic CVD diamond material and high quality synthetic CVD diamond materials.

Synthetic CVD diamond

A method of producing a large area plate of single crystal diamond from CVD diamond grown on a substrate substantially free of surface defects by chemical vapour deposition (CVD). The homoepitaxial CVD grown diamond and the substrate are severed transverse to the surface of the substrate on which diamond growth took place to produce the large area plate of single crystal CVD diamond.

Single crystal diamond

A single crystal CVD synthetic diamond layer comprising a non-parallel dislocation array, wherein the non-parallel dislocation array comprises a plurality of dislocations forming an array of inter-crossing dislocations, as viewed in an X-ray topographic cross-sectional view or under luminescent conditions.

Dislocation engineering in single crystal synthetic diamond material

A method of producing a large area plate of single crystal diamond from CVD diamond grown on a substrate substantially free of surface defects by chemical vapor deposition (CVD). The homoepitaxial CVD grown diamond and the substrate are severed transverse to the surface of the substrate on which diamond growth took place to produce the large area plate of single crystal CVD diamond.

The invention relates to a single crystal CVD diamond material, wherein the extended defect density as characterized by X-ray topography is less than 400/cm2 over an area of greater than 0.014 cm2. The invention further relates to a method for producing a CVD single crystal diamond material according to any preceding claim comprising the step of selecting a substrate on which to grow the CVD single crystal diamond, wherein the substrate has at least one of a density of extended defects as characterized by X-ray topography of less than 400/cm2 over an area greater than 0.014 cm2; an optical isotropy of less than 1&#xd7;10-5 over a volume greater than 0.1 mm3; and a FWHM X-ray rocking curve width for the (004) reflection of less than 20 arc seconds.

High crystalline quality synthetic diamond

A diamond layer of single crystal CVD diamond which is colored, preferably which has a fancy color, and which has a thickness of greater than 1 mm.

Coloured diamond

A single crystal diamond prepared by CVD and having one or more electronic characteristics; making the diamond suitable for electronic applications. Also provided is a method of making the single crystal CVD diamond.

Single crystal diamond prepared by CVD

A method of producing a CVD single crystal diamond layer on a substrate includes adding into a DVD synthesis atmosphere a gaseous source comprising silicon. The method can be used to mark the diamond material, for instance to provide means by which its synthetic nature can more easily be determined. It can also be exploited to generate single crystal diamond material of high color.

Diamond

Growing community of inventors

Littlewick Green, United Kingdom

Philip Maurice Martineau