IRC is TT Electronics Resistor Brand. Founded in 1923 in Philadelphia, PA, IRC has been an innovative leader in the design, development and manufacture of resistors throughout the entire life of the electronics industry. A pioneer in resistive film technologies, IRC was the original developer of nichrome thin film resistors in the 1950s, achieving a step change in the level of precision available to designers. This was followed by the implementation of moisture resistant tantalum nitride films, invented by Bell Labs in the 1960s, and their development into a comprehensive portfolio of high reliability precision resistors and networks. Proprietary metal glaze technology was also developed as a means of delivering higher power density in high reliability applications. In the 1990s the growing demand for lower ohmic value resistors was met with proprietary thick film chips and by many innovations in the field of low ohmic value metal element parts. Totday product development and manufacture continue at TT Electronics' thin-film centre of excellence at Dallas, TX.