| 摘要 |
PURPOSE:To prevent the separation and disappearance of display marks by performing sealing by using metal molds whose surface of the cavity part is roughened, and providing coarse surface of the sealing resin on which the marks are attached. CONSTITUTION:The bottom of the cavity 8 of the sealing metal mold is roughened. For example, polishing powder of No.120 and the like is blasted on the surface so as to obtain the coarse surface. Only the upper surface of the sealing resin is likewise roughened by the coarse surface of said metal mold. When the marks 4 are compressed to the coarse surface 2, ink is inputted into the concave parts of the coarse surface, and the separation or disappearance of the marks can be prevented. |
