SYNTHETIC SINGLE CRYSTAL DIAMOND

• Main Authors: SUMIYA HITOSHI, YAMAMOTO KAZUKO, HAMAKI KENSEI, TERAMOTO MINORI
• Format: Patent
• Language: English; Japanese
• Published: 13.06.2023
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; CHEMISTRY; COMPOUNDS THEREOF; CRYSTAL GROWTH; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; 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; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

To provide synthetic single crystal diamond having high hardness and excellent defect resistance.SOLUTION: Synthetic single crystal diamond contains a nitrogen atom of a concentration of over 600 ppm and 1,500 ppm or less. The peak Raman shift λ'(cm-1) in a primary Raman scattering spectrum of the synthetic single crystal diamond and the peak Raman shift λ(cm-1) in a primary Raman scattering spectrum of the synthetic IIa-type single crystal diamond having a content of a nitrogen atom of 1 ppm or less show following relation. λ'-λ≥-0.10 (1)SELECTED DRAWING: None 【課題】高い硬度及び優れた耐欠損性を有する合成単結晶ダイヤモンドを提供する。【解決手段】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。【選択図】なし