| 摘要 |
PROBLEM TO BE SOLVED: To prevent the defective shape of wiring boards from being formed due to burrs on the boards, a break in the boards, and the like when a ceramic board is split into the individual wiring boards. SOLUTION: One ceramic board 10 is cut along split grooves 5 and is separated into a multitude of wiring boards 8 and the multitude of the wiring boards 8 are formed. Metal parts 9 are formed along the grooves 5 at the positions in the vicinities of the regions directly under the grooves 5 in the interior of the board 10. |
