Patent ID: 6580077
Filing Date: 2003-06-17
Classification: G01J

Abstract:
An infrared sensor comprising:a stem having two main surfaces, an electrode provided on one main surface of the stem so as to extend in a closed loop along the outer circumference of the stem, and a ground electrode provided on the other main surface of the stem for providing electro-magnetic shielding; a pyroelectric element arranged on said one main surface of the stem; a conversion circuit disposed on said one main surface of the stem for changing electric charge generated in the pyroelectric element into a signal; and a plurality of lead terminals extending through respective openings in the stem from said one main surface of the stem to the other main surface of the stem and being electrically connected to the conversion circuit, the lead terminals being deformed adjacent the openings to fix and seal the lead terminals to the stem; a case made of conductive material, said case being electrically connected to the electrode provided along the outer circumference on said one main surface of the stem; wherein the electrode on said one main surface of the stem is electrically connected to the ground electrode on the other main surface of the stem by one of the lead terminals through one of said openings.