INNER MATERIAL AND MULTILAYER LAMINATED BOARD PROVIDED THEREWITH

摘要

PURPOSE:To provide an inner material where the boring direction of a reference hole can be ascertained without fail and a multilayer laminated board provided with a reference hole which enables the laminate board to be accurately processed. CONSTITUTION:At least, one of guide marks different from each other in shape is provided to an inner material used as the component material of a multilayer laminated board. One of the guide marks 2 and 3 different from each other in shape provided to the inner material 1 clearly shows the directional property of a multilayer laminated board. A hole which is used as a reference hole when the multilayer laminated board is processed is bored in the laminated board at a symmetrical position for equational correction concerning the center of the connected guide marks of the inner material. Furthermore, the reference holes different from each other in size are provided to the multilayer laminated board.