The ESPANEX series of copper-clad lami-nated sheets (two-layer CCLs) for flexible printed circuit boards was developed by means of Nippon Steel Chemical's proprietary technology.

ESPANEX has an excellent reputation as indispensable not only in the circuit boards for mobile phones, video cameras etc. but also in the drive circuit boards for LCDs (liquid crystal displays), where high performance and high As semiconductors move toward higher densities and higher levels of integration, requirements are becoming increasingly stringent with regard to rates of dimensional change, thermal resistance, electrical properties, mechanical properties etc.