Rigid-Flex PCB design seems to be complicated, considering both the direction of various signals and the energy transfer, the disturbance and the pain caused by heat are always present. But in fact, the summary is very clear, can be started from two aspects: put it bluntly: “how to put” and “how to connect.”
The above is about the “how to place” that is the layout of the main matters needing attention. As for “how to connect”, it is relatively more complicated, which is basically as follows:
Key signal line priority: simulation small signal, high-speed signal, clock signal and synchronization signal and other key signals priority wiring;
Density first principle: start wiring from the components with the most complex connections on the veneer. Start wiring from the most densely wired area on the veneer.
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