SYNTHETIC SINGLE-CRYSTAL DIAMOND

• Main Authors: SUMIYA, Hitoshi, YAMAMOTO, Katsuko, HAMAKI, Kensei, TERAMOTO, Minori
• Format: Patent
• Language: English; French; Japanese
• Published: 25.04.2019
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; BORING; CHEMISTRY; CRYSTAL GROWTH; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; TRANSPORTING; TURNING; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

A synthetic single-crystal diamond that contains nitrogen atoms at a concentration of more than 600 ppm but no more than 1,500 ppm. The Raman shift λ' (cm-1) of the peak in a primary Raman scattering spectrum for the synthetic single-crystal diamond and the Raman shift λ (cm-1) of the peak in a primary Raman scattering spectrum for a synthetic IIa-type single-crystal diamond that has a nitrogen atom content of no more than 1 ppm satisfy expression (1). Expression (1): λ'-λ≥-0.10. L'invention concerne un diamant monocristallin synthétique qui contient des atomes d'azote à une concentration supérieure à 600 ppm mais inférieure ou égale à 1 500 ppm. Le décalage Raman λ' (cm-1) du pic dans un spectre de diffusion Raman primaire du diamant monocristallin synthétique et le décalage Raman λ (cm-1) du pic dans un spectre de diffusion Raman primaire d'un diamant monocristallin de type IIa synthétique qui présente une teneur en atomes d'azote inférieure ou égale à 1 ppm satisfont à l'expression (1). Expression (1) : λ' - λ ≥ -0,10. 窒素原子を６００ｐｐｍを超えて、かつ、１５００ｐｐｍ以下の濃度で含有する合成単結晶ダイヤモンドであって、前記合成単結晶ダイヤモンドの１次ラマン散乱スペクトルにおけるピークのラマンシフトλ'（ｃｍ－１）と、窒素原子の含有量が１ｐｐｍ以下の合成ＩＩａ型単結晶ダイヤモンドの１次ラマン散乱スペクトルにおけるピークのラマンシフトλ（ｃｍ－１）とは、下記式（１）の関係を示す、 λ'－λ≧－０．１０　式（１） 合成単結晶ダイヤモンドである。