The present invention provides a highly reliable circuit board that includes TFTs a semiconductor layer of which is formed from an oxide semiconductor; and low-resistance aluminum wirings. A pair of semiconductor memory devices are mounted on both sides of a substrate to be symmetrical to each other. Then, the filler remaining in the via is removed, and the trench and the via are filled with an interconnection material to complete the dual damascene interconnections. The material of the second component is selected only if G\u2032 is a certain value at a specific temperature and frequency range. In one embodiment the Airy pattern of the point response of the optical system encompasses both a detector and corresponding light sources. Methods for making the devices herein are disclosed.