I have a copy of the IPC designer certification study guide, some of the sample exam questions relate to layout format, ie do not mix analog and digital sections etc etc, but there is virtually no information in the study guide relating to this. There is much useful detail information, but not a lot relating to layout. There is reference to two IPC standards, IPC -D-275 and IPC-T-50, and there is also a cd rom available. My question is where can I find the more relevant information to pcb layout, the two standards, the cd rom or some other material? Christopher Johnston Technology Research and Development Australain Broadcasting Corporation 700 Harris st, Ultimo Sydney, NSW AUSTRALIA.