Abstract: A dielectric ceramic composition, a multi-layer ceramic capacitor and a manufacturing method characterized by superior dielectric properties. The ceramic capacitor includes a chip having a plurality of dielectric layers, a plurality of internal electrodes stacked alternately with the dielectric layers, and a pair of outer electrodes formed on both sides of the chip, with the composition of the dielectric layers including: 100 moles of barium calcium titanate BaCaxTiO3 (0.001≦x≦0.02), 0.5-4 moles of MgO, 0.01-0.5 moles of MnO, 0.1—2 moles of BaO, 0.1-2 moles of CaO, 1-4 moles of SiO2, and 0.1-3 moles of at least one or more compounds selected from the group consisting of Y2O3, Dy2O3, Ho203 and Er2O3. The capacitor thus manufactured satisfies the X7R standard and has superior dielectric properties, and the deviations of the dielectric properties are extremely low, thereby ensuring a high reliability.

Abstract: A dielectric ceramic composition, a multi-layer ceramic capacitor using it and a manufacturing method therefor are disclosed, in which the dielectric properties are superior. The ceramic capacitor includes a chip having a plurality of dielectric layers 2, a plurality of internal electrodes 3 stacked alternately with the dielectric layers, and a pair of outer electrodes 4 formed on both sides of the chip, the composition of dielectric layers comprising: 100 moles of barium calcium titanate BaCaxTiO3(0.001≦x≦0.02), 0.5-4 moles of MgO, 0.01-0.5 moles of MnO, 0.1-2 moles of BaO, 0.1-2 moles of CaO, 1-4 moles of SiO2, and 0.1-3 moles of at least one or more compounds selected from the group consisting of Y2O3, Dy2O3, Ho2O3 and Er2O3. The capacitor thus manufactured satisfies the X7R standard has superior dielectric properties, and the deviations of the dielectric properties are extremely low, thereby ensuring a high reliability.

Abstract: A pyroelectric infrared sensor includes light receiving electrodes and light reflecting electrodes being arranged in a two-set-three-series relative to top and bottom surfaces of the pyroelectric material. The first through sixth light receiving electrodes are formed to be of opposite polarity to each other. The first through sixth reflecting electrodes corresponding to the first through sixth light receiving electrodes are formed on the bottom surface of the material and connected to the connecting electrode of the same polarity so that a sensed signal of the same magnitude of infrared rays having the same energy irrespective of direction is outputted.