Method for avoiding drilling abnormity of rigid-flex board

The invention discloses a method for avoiding drilling abnormality of a rigid-flex board, which comprises the following steps of: S1, preparing a cushion wood board according to the expansion-contraction ratio of the rigid-flex board, and drilling two drilling positioning holes on the cushion wood board, S2, outputting LDI exposure data according to the height difference area of the back face of the rigid-flex board in engineering, and exposing the area needing to be filled, S3, pasting a dry film on the front surface of the cushion wood board, performing LDI secondary drilling positioning hole exposure, and performing exposure according to engineering data, S4, removing the dry film in an unwanted area on the front surface of the cushion wood board through development, and leaving the dryfilm in an area required to be filled on the cushion wood board, and S5, sleeving PIN nails with the cushion wood board filled with the dry film, and then sleeving the PIN nails with the rigid-flex board. According to the rigid-flex board, four procedures such as film pressing, exposure, development and film removing are not needed, the quality risk hidden danger that a dry film remains at the bottom of a hole when the rigid-flex board with a blind hole is subjected to film removing is avoided, the production cost is effectively reduced, and the production yield is increased.