Koike Co. is committed to a Quality Assurance System that is second to none. In 1998 Koike Co. was certified and approved,for ISO-9002 standards (Certification number JQA-2241). 　"Zero claims from our customers" is the slogan of our Quality Control Department, which permeates every department from R & D, Engineering, Producton, and Administration. The goal of each department is to support, maintain and improve product quality to the highest levels for which Koike Co. is internationally recognized. 　At Koike Co., we strive to be the best and take pride in being recognized by our customers as a supplier of premium product driven by a dedicated,company wide Quality Assurance System. ■Size：3inch and 4inch ■Cut-Angle：25°〜 45° ■Thickness：0.10mm 〜 1.00mm ■Surface：Double side polish 　　　　　　　Single side polish(Back side Ra:0.1 〜 2.0μm) 　Quartz wafers are used in the manufacturing of substrates for SAW(Surface Acoustic Wave) devices, frequency filters and resonators for wireless communications. Quartz wafers are widely used as a substrate for IF communication devices because of its stable frequency characteristics in a variable temperature environment. ■Size：Length 1.8mm 〜 8.0mm 　　　　Width 1.0mm 〜 3.0mm ■Frequency：Etched blank 3MHz 〜 100MHz(Fundamental) 　　　　　Polished blank 10MHz 〜 180Mhz(Third overtone) ■Cut-Angle Tolerance：Minimum Range 15 Second 　Quartz blanks are manufactured in round and strip shapes for applications in resonators, oscillators and filters. 　Koike Co.'s expertise is in the production of extremely precise and reliable high frequency blanks for miniature digital information and communication devices. ■Double refraction plate ■Quarter wave plate ■Optical isolator plate ■Bulk wave plate 　Optical quartz plates are used in multi-refraction applications in digital cameras and videos, and as a "pick-up" for DVD and optical discs. Future applications for optical plates are in sensors for: 　-ITS (Intelligent Transport System) 　-VICS (Vehicle Information and CommunicationsS ystems) 　-AHS (Automated Highway systems) 　-Control devices for optical fiber cable communication. ■Size：4inch ■Cut-Angle：Rot-Y 36°〜 50° X 112.2°e.t.c ■Thickness：0.15mm 〜 0.50mm ■Surface：Double side polish 　　　　　　　Single side polish(Back side Ra:0.4 〜 2.0μm) 　LiTaO3 wafers are used in the manufacturing of substrates for RF type SAW devices, high frequency filters with a wide bandwidth. These next generation substrates are necessary for handling high volume graphics applications for wireless communications such as "Bluetooth". 　We provide high presision and excellent flatness cutting and polishing service for test sample and mass production of oxide, floride and nitride crystals.