| 摘要 |
PURPOSE:To prevent the storage contents of a memory and the contents of its relative integrated circuit from illegally be copied by decoding the contents of the memory by a 3rd person. CONSTITUTION:Electric conductors 16 for the power supply of an integrated circuit chip 20 are bent and formed in the entire mount area on the substrate 10. The integrated circuit chip 20 is mounted barely in the mount area while having its top side opposite the substrate top surface, and protected by molding its top with resin, etc. The integrated circuit chip 20 which is thus mounted can not have its top side seen directly and the moment the integrated circuit chip 20 tries to be peeled off the substrate 10, the power supply is cut off, so that the contents stored in the memory in the integrated circuit chip 20 are lost. Further, even if the memory contents tried to be analyzed by holing the substrate 10 without damaging the integrated circuit chip 20 from the reverse side of the substrate 10, the conductors 16 for the power supply are disconnected, so the storage contents are lost even in this case to prevent the memory contents from being decoded. |
