Low leakage battery protection diode structure

Details Low leakage battery protection diode structure Low leakage battery protection diode structure

1988-04-29

1989-08-29

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Impedance insertion

365229, 357 41, 357 48, 307 66, 429121, H02J 902

Patent

active

048623105

ABSTRACT:
A battery protection device for preventing battery charging comprises a diode formed with a p+ region (36) within an N-type region (34). The diode is completely surrounded by a P-well (32) to prevent minority carrier injection from the N-type region (34) to the N-type substrate (30). The N-type region (34) is connected to the P-well (32) and to the substrate (30) through an electrical connection (43). By preventing minority carrier injection into the substrate (30), leakage through a parasitic transistor is prevented.

REFERENCES:
patent: 4239558 (1980-12-01), Morishita et al.
patent: 4642667 (1987-02-01), Magee
patent: 4658352 (1987-04-01), Nagasawa
patent: 4713555 (1987-12-01), Lee
patent: 4730121 (1988-03-01), Lee et al.
Sedra, Adel S. and Kenneth C. Smith, Microelectronic Circuits, 1982, p. 358.

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