Coin-shaped integrated circuit memory device

Details Coin-shaped integrated circuit memory device Coin-shaped integrated circuit memory device

1992-12-17

1994-09-27

Jackson, Jerome

Active solid-state devices (e.g., transistors, solid-state diode

Housing or package

Smart card package

257730, 257693, 368 88, 360 60, H01L 2302

Patent

active

053509455

ABSTRACT:
The invention relates to an integrated circuit memory device 1 in which connecting terminals 11b for transmitting signals between itself and an external device are provided on a bottom surface of a coin-shaped case 10 containing an integrated circuit memory chip 12. A changeover switch 20 for changing the memory chip 12 to a data-writing mode is provided at an outer peripheral side portion of the coin-shaped case 10. The switch 20 has an operation knob 24 located in a notch 13A formed in a ring-shaped core member 13 of the case 10, and a contact plate 22 formed integrally with the knob 24. The switch 20 selectively switches the memory chip 12 in a data-writing mode and in a data-writing protect mode. In the data-writing protect mode, the write (WR) signal supplied to a write terminal of a circuit substrate 11 is prevented from being input to a write electrode of the memory chip 12.

REFERENCES:
patent: 4064552 (1977-12-01), Angelucci et al.
patent: 4288841 (1981-09-01), Gogal
patent: 4437718 (1984-03-01), Selinko
patent: 4463971 (1984-08-01), Hoppe et al.
patent: 4649418 (1987-03-01), Uden
patent: 4737602 (1988-04-01), Yamamoto
patent: 4862249 (1989-08-01), Carlson
patent: 5025141 (1991-06-01), Bolan
patent: 5148264 (1992-09-01), Satriano

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