Patent ID: 7827851

Claim:
A packaging structure of a gas detector, comprising: a printed circuit board; a plurality of first contact terminals, disposed on the front surface of the printed circuit board; a plurality of second contact terminals, disposed on a rear surface of the printed circuit board, and electrically connected with the first contact terminals by through holes and conductive wires made of a copper foil, the second contact terminals being in spatially unregistered relation to the first contact terminals; a semiconductor device, operable to detect a gas disposed on the front surface of the printed circuit board and signal terminals of the semiconductor device electrically connected with the first contact terminals by chip-bonding wires, wherein the first contact terminals are wire-bonding pads of the semiconductor device, while the second contact terminals are wire-bonding pads of external circuits external to the packaging structure; and a ventilation cover, positioned at the printed circuit board to cover the semiconductor device.