Chip-type protection device having enclosed micro-gap...

Details Chip-type protection device having enclosed micro-gap... Chip-type protection device having enclosed micro-gap...

2009-07-22

2011-12-06

Nguyen, Danny (Department: 2836)

Electricity: electrical systems and devices

Discharging or preventing accumulation of electric charge

C361S056000

Reexamination Certificate

active

08072730

ABSTRACT:
The present invention relates to a chip-type protection device having an enclosed micro-gap between electrodes. The invention includes a substrate on which a pair of discharge electrodes extend towards each other by a micro-gap. A wall is disposed in a manner spaced apart from the micro-gaps by a predetermined distance, on which a cover portion is mounted in a straddling manner across the micro-gaps. The wall and the cover portion are integrated under a predetermined gaseous environment to form a hermectic chamber on which an outer protective layer is coated. End electrodes are subsequently formed on the substrate in a manner connected to conductive portions of the discharge electrodes. The invention provides a protection device against over-voltage.

REFERENCES:
patent: 2002/0167773 (2002-11-01), Sawada et al.
patent: 2008/0239610 (2008-10-01), Yu et al.
patent: 2010/0067163 (2010-03-01), Nozoe et al.

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