Circuit board and electric device having circuit board

Details Circuit board and electric device having circuit board Circuit board and electric device having circuit board

2005-10-26

2009-02-24

Nguyen, Danny (Department: 2836)

Electricity: electrical systems and devices

Discharging or preventing accumulation of electric charge

C361S220000

Reexamination Certificate

active

07495880

ABSTRACT:
A circuit board includes: an input terminal for inputting a signal from an external circuit; a first land and a second land; and an electrostatic-charge absorbing conductor for absorbing an electrostatic charge. The first land is electrically connected to the input terminal. The second land is separated from the first land by a predetermined distance therebetween. A distance between the electrostatic-charge absorbing conductor and the first land is shorter than a distance between the first land and the second land. In the circuit board, the electrostatic charge is effectively absorbed into the electrostatic-charge absorbing conductor through the first land so that the electrostatic charge is prevented from negatively affecting on electric parts on the board.

REFERENCES:
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patent: 5029041 (1991-07-01), Robinson et al.
patent: 5656530 (1997-08-01), Leary
patent: 6510034 (2003-01-01), Palinkas et al.
patent: 6559729 (2003-05-01), Goma et al.
patent: 7224052 (2007-05-01), Nishizawa et al.
patent: 2-68468 (1990-05-01), None
patent: 2000-323800 (2000-11-01), None
patent: 2001-7455 (2001-01-01), None

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