1982 successful synthesis level of the world's largest diamond single crystal

Is the core of sumitomo electric wire products, in the process of manufacture of wire, specifies the size in diameter for wire processed into, need to use tool called "the diamond die".Manufacturing of wire drawing die materials for hard alloy, 1970 years or so, instead of hard alloy material, sumitomo electric industries began to focus on diamond.Sumitomo electric synthetic diamond began with a development history is created.

At that time, U.S. companies have been successfully synthesized 4 ~ 5 mm in diam synthetic diamond (0.75 carats), so it is considered that under the premise of avoiding existing patent, cannot develop diamond.The company unceasingly studies the new synthesis technology, the synthetic was successful in 1982 the diameter of the maximum level of about 6 mm (1.2 carats) diamond single crystal, and was published in 1984 edition of the guinness book of world records, titled "the world's largest synthetic diamond.Then, the company in 1989 to achieve the level of 1 cm large volume production of synthetic diamond single crystal.The crystal due to the effect of impurities in yellow, to create more large colorless transparent crystal with high purity, expand its scope of application and promote the development of industrial technology, the researchers with passion heart adhere to the research and development, has now been made high purity colorless transparent 11 ~ 12 mm diameter (10 carat left and right) of high quality large crystals.

Now, we not only expand the application in the field of traditional tools, but also will be used to expand into the optical components, window materials, spectral components, etc. The tools products field.