It has passed 40 years since we started manufacturing a variety of heaters mainly for signal receiving tubes and cathode- ray tubes, while we have been shipping approximately 500 million heaters to overseas as well as domestic cathode-ray tube manufacturers. The high quality and high reliability of our heaters is based on the use of carefully selected materials, long-established fine processing technology for tungsten, and high-precision coating technology for insulation materials. These heaters are highly evaluated in a variety of industrial field