Establishes the requirements for flexible base dielectric materials thatare used in the fabrication of flexible printed circuitry and flexibleflat cable. Provides comprehensive data that will help users more easilydetermine both material capability and compatibility. IPC-4202 includesflexible base dielectric material specification sheets which areidentified by material type. IPC-4202 is closely aligned with IPC-4203and IPC-4204. Supersedes IPC-FC-231C with Amendment 1 included and, inturn, IPC-FC-231C, IPC-FC-231B, IPC-FC-231A and IPC-FC-231. 32 pages.Released May 2002.