本文介绍了一种采用微工艺技术且适于高密度组装技术的FPC。叙述了有关用激光加工技术、光刻技术进行的高精密开孔，外形加工、形成通孔等，作为其应用例之一，现已提出了新的FPC部件组装用的连接结构。另外，对业已开始实用化的多层FPC进行了慨述。 This article describes a FPC that uses micro-fabrication techniques and is suitable for high-density assembly techniques. A description has been given of a new connection structure for assembly of an FPC component as one of the application examples of the high-precision opening, the contour processing and the formation of the through-hole by the laser processing technique and the photolithography technique. In addition, the multi-layer FPC that has already been put into practical use has been described.