Patent ID: 7242087
Filing Date: 2007-07-10
Classification: G11B,H01L,H05K

Abstract:
1. A flexible printed circuit (FPC) board comprising: a substrate layer composed of insulating material; a first wiring layer on the front surface of the substrate layer; a second wiring layer on the back surface of the substrate layer; at least one dielectric layer; at least one counter electrode layer; a first interlayer connector connecting to the counter electrode layer on the back surface of the substrate layer and to the first wiring layer through the substrate layer; a second interlayer connector connecting to the counter electrode layer on the back surface of the substrate layer through the substrate layer; a third interlayer connector connecting to the second wiring layer through the substrate layer; and an element chip on the front surface of the substrate layer, the element chip including a resin mold segment and connectors on the lower surface of the resin mold segment, the connectors connecting to the second interlayer connector and to the third interlayer connector, respectively, wherein a stack of a dielectric layer, a counter electrode layer, and the first wiring layer, and/or a stack of a dielectric layer, a counter electrode layer, and the second wiring layer defines a protection circuit of a thin-film capacitor element, at least a portion of each of the first wiring layer, the second wiring layer, and the counter electrode layer serves as a terminal, each of the first wiring layer, the second wiring layer, and the counter electrode layer, except the terminal portion, is covered with an insulating coating, and wherein the dielectric layer and the counter electrode layer are sandwiched between the second wiring layer and the substrate layer.