PURPOSE: To obtain a hybrid element having a memory holding function by itself by boring separate holes to a vessel made of ceramics, making a memory element and a battery for a backup power supply consisting of a solid electolytic battery contain in the vessel and clogging the holes by hole sealing plates.

CONSTITUTION: A hole 2 for receiving a memory element is bored to a vessel 1 made of ceramics, and external terminals 9 for leading out connected to the received memory element are formed to the external wall of the vessel 1. A hole 3 receiving a battery for a backup power supply also formed separately in the same manner, a metal evaporated film conbining a current collecting plate is applied on the bottom of the hole 3, and terminals 9 connected to the metal evaporated film are shaped to the external wall of the vessel 1. The memory element 4 is received in the hole 2 and a hole sealing plate 5 is fusion-bonded to a flange section 2a formed to the fringe of the hole 2, and the battery 6 is received in the hole 3 and a hole sealing plate 7, a lower surface thereof has a battery hold-down spring 8, is fusion-bonded to the flange section 3a of the fringe of the hole 3. The battery 6 is constituted by a laminate composed of a conductive substrate 6a, a titanium disulfide layer 6b, a solid electrolytic layer 6c and a lithium layer 6d at that time.