IPC Standards for Rigid and Flexible PCBs The list of IPC standards below applies to rigid PCBs and flex circuits. Take note that this list is not exhaustive, and additional IPC standards may need to be considered. You should consult the ipc.org website for a full list of available IPC standards. IPC-2221A, Generic Standard on Printed Board Design IPC-2223, Sectional Design Standard for Flexible Printed Boards IPC-4101, Specification for Base Materials for Rigid and Multilayer Printed Boards IPC-4202, Flexible Base Dielectrics for Use in Flexible Printed Circuitry IPC-4203, Adhesive Coated Dielectric Films for Use as Cover Sheets for Flexible Printed Circuitry and Flexible Adhesive Bonding Films IPC-4204, Flexible Metal-Clad Dielectrics for Use in Fabrication of Flexible Printed CircuitryIPC-6013, Qualification and Performance Specification for Flexible Printed Wiring