IPC Specifications
IPC-A-600 Acceptability of Printed Boards
IPC-A-610 Acceptability of Printed Wiring Assemblies
IPC-6011 Generic Performance Specification for Printed Boards
IPC-6012 Qualification and Performance Specifications for Rigid Printed Circuit Boards
IPC-6013 Qualification and Performance Specifications for Flexible Printed Circuit Boards
All of the specifications listed above are available at www.ipc.org