Feed-Through Type Multilayer Capacitor for High Frequency Voltage Noise Suppression

A novel feed-through type multilayer ceramic capacitor (MLCC) is proposed using vertically oriented internal electrodes. The proposed capacitor has a distinctive structure to effectively reduce the parasitic equivalent series inductance (ESL), and thus the noise suppression performance of the capacitor can be greatly improved. Furthermore, it can be made compact with the help of relatively simple terminal structure. Therefore, the capacitor developed here is suitably used as a bypass capacitor in mobile communication systems where miniaturized components with high performance are essentially required. To demonstrate the feasibility and validity of the proposed capacitor, the size 1005 capacitors and evaluation boards have been designed and fabricated. According to the measured results, the proposed capacitor provides the insertion loss of 47.5 dB at 1.0 GHz, and thus the peak to peak voltage noise is reduced from 352 mV to 287 mV by using the proposed capacitor instead of using the regular two terminal MLCC.