| 摘要 |
PURPOSE:To disperse a residual stress of an organic resin layer to be concentrated at the end of a board and to prevent peeling of an organic resin layer from the board or crack of a glass ceramic board due to a stress by forming a groove on the periphery of the surface of the board, and forming a structure having the end of the layer to be laminated therein. CONSTITUTION:A groove 12 is fanned on the periphery of a laminated surface of a GCS 11. The end of a polyimide layer 13 of organic resin to be laminated on a board is formed in a structure to be matched to the outer periphery of the groove. The groove 12 is formed at the time point of a green sheet laminate before normal baking. It is because its processing is easy at the time point of the laminate, but the groove might be deviated from a desired position due to difference of contraction rates of laminates after baking. Accordingly, if an accurate groove is formed, it may be formed after baking. The groove is formed under a boundary of the layer 13 to increase the contact area of the layer 13 with the GCS 11, thereby increasing the close contact strength therebetween. |
