The present invention provides a thin and bendable semiconductor device utilizing an advantage of a flexible substrate used in the semiconductor device, and a method of manufacturing the semiconductor device. Specifically, the selection of a 1,3-thiazol-2-yl ring member linked by an ethynylene to the 3 position of a pyridyl ring or the 5 position of a pyrimidinyl ring, wherein the ring is substituted with selected substituents, results in a compound having superior drug-like properties. Meanwhile, a holding capacitance is formed by the upper light-shielding film, the second insulating film and the pixel electrode. The groove extends from the outer periphery towards but spaced from the inner periphery.