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Matters needing attention in the design of Rigid-Flex boards
Things to keep in mind when laying out:

1. The device needs to be placed in the hard area, and the flexible area is only used for connection, which can improve the life of the board and ensure the reliability of the board. If the device is placed in the flexible area, it is easy to cause the pad to crack or the characters to fall off.

2. When the device is placed in the hard area, there must be at least a 1mm distance from the Rigid and Flex area.

When wiring, you need to pay attention to:

1. The graphics in the Flex area should be at least 10mil away from the edge of the board, no holes can be drilled, and the distance between the via hole and the joint between Flex and Rigid is at least 2mm.

2. The lines in the flexible board area should be smooth, and the corners should be connected by circular arcs. At the same time, the straight lines and arcs should be vertical, and the pads should be treated with teardrops to avoid tearing

3. At the edge of the flexure area, copper foil needs to be used to reinforce the connection at the bend of the connection.

4. In order to achieve better flexibility, the bending area should avoid changes in trace width and uneven trace density.

5. The wiring at the bottom of the table should be staggered as much as possible to avoid overlapping the lines at the bottom of the table.