IC card

Details IC card IC card

2007-09-11

2007-09-11

Le, Thien M. (Department: 2876)

Registers

Records

Conductive

C235S441000

Reexamination Certificate

active

11619129

ABSTRACT:
An IC card capable of reinforcing the prevention of the electrostatic damage without causing a rise in the cost of a semiconductor integrated circuit chip. The semiconductor integrated circuit chip (2) is mounted on a card substrate (1), and plural connection terminals (3) are exposed. The connection terminals are connected to predetermined external terminals (4) of the semiconductor integrated circuit chip, first overvoltage protection elements (7, 8, 9) connected to the external terminals are integrated in the semiconductor integrated circuit chip, and second overvoltage protection elements such as surface-mount type varistors (11) connected to the connection terminals are mounted on the card substrate. The varistors are variable resistor elements having a current tolerating ability greater than that of the first overvoltage protection elements. The varistors have been selected by taking into consideration a relationship between the characteristics and the ability of the first overvoltage protection elements contained in the semiconductor integrated circuit chip, and exhibit the effect for preventing the electrostatic damage.

REFERENCES:
patent: 4816656 (1989-03-01), Nakano et al.
patent: 4896028 (1990-01-01), Kushima
patent: 4918631 (1990-04-01), Hara et al.
patent: 4962415 (1990-10-01), Yamamoto et al.
patent: 5204512 (1993-04-01), Ieki et al.
patent: 5378944 (1995-01-01), Gochi
patent: 5451763 (1995-09-01), Pickett et al.
patent: 5506499 (1996-04-01), Puar
patent: 5550402 (1996-08-01), Nicklaus
patent: 5671123 (1997-09-01), Omori
patent: 5715431 (1998-02-01), Everett et al.
patent: 5988509 (1999-11-01), Taskett
patent: 5998858 (1999-12-01), Little et al.
patent: 5999409 (1999-12-01), Ando et al.
patent: 6002177 (1999-12-01), Gaynes et al.
patent: 6235553 (2001-05-01), Kawan
patent: 6315195 (2001-11-01), Ramachandran
patent: 6410987 (2002-06-01), Kanemoto et al.
patent: 6573567 (2003-06-01), Nishizawa et al.
patent: 6669487 (2003-12-01), Nishizawa et al.
patent: 6742117 (2004-05-01), Hikita et al.
patent: 6843421 (2005-01-01), Chhor et al.
patent: 2001/0023982 (2001-09-01), Wallace
patent: 2002/0180060 (2002-12-01), Masuda et al.
patent: 2003/0029920 (2003-02-01), Chhor et al.
patent: 2004/0046977 (2004-03-01), Silverbrook et al.
patent: 2004/0169081 (2004-09-01), Azuma
patent: 2005/0023361 (2005-02-01), Ikefuji et al.
patent: 4-302164 (1992-10-01), None
patent: 11-204720 (1999-07-01), None
patent: 11-273400 (1999-10-01), None

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