Electronic-grade germanium single crystal: the resistivity range of 0.25 ~ 50Ωcm, inhomogeneous resistivity <15%, orientation (111) crystal to deviate from the <2 °, the dislocation density from 1000 to 3500 / cm ². Minority carrier lifetime of 150 microseconds. Electronic-grade germanium single crystal is mainly used for the production of germanium transistors, due to the electron and hole mobility in germanium compared with silicon, high-speed switching circuits, the performance of germanium is much better than silicon.
Optical-grade germanium single crystal: conductive Model N, the doping agent of Sb, the resistivity range 10 ~ 30Ωcm diameter Φ8 ~ 250mm, the transmission wavelength range from 2 to 14μm, the transmission rate (d = 2mm uncoated) = 46 ~ 47% the absorption coefficient is <0.02/cm. It’s a special band structure of the electron – photon and photon – phonon interaction lead germanium infrared radiation have wide optical transmission range, 3 ~ 5mm to 14mm wavelength infrared atmospheric window has excellent through properties. Polished germanium single-chip, its transmission rate can reach 46 ~ 48% after antireflective coating, the transmittance can reach 95 ~ 98%. Germanium is a high performance infrared optical materials, widely used in manufacturing the lens of the infrared system, windows, prisms, filters, dome and other infrared devices are now available according to different requirements, drawing the maximum diameter of 300mm germanium single crystal.
Infrared optical germanium crystal lens blank: according to the requirements of the production of an arbitrary radius of curvature of germanium single crystal lens blank, due to the infrared optical germanium single crystal during the cold production of lens spherical, larger deterioration of materials, this technology can save expensive germanium single crystal material about 50%.
Read more:germanium single crystal for sale
No comments:
Post a Comment