Abstract: An object of the present invention is to provide a prepreg which has both excellent mechanical properties such as strength and elastic modulus and excellent appearance such as low-coloring property, transparency and weather resistance, and which also has an excellent tacking property, as well as to provide a fiber-reinforced composite material, a tubular fiber-reinforced composite material, a golf club shaft and a fishing rod, using the prepreg. The gist of the present invention is a prepreg including reinforcing fibers and a resin composition, wherein the resin composition contains the following component [A] to component [D]: component [A]: epoxy resins; component [B]: dicyandiamide; component [C]: a compound which has a boiling point of 130° C.

Abstract: An operating semiconductor layer is formed in such a manner that amorphous silicon layer is formed to be shaped so that it has a wide region and a narrow region and the narrow region is connected to the wide region at a position asymmetric to the wide region, and the amorphous silicon layer is crystallized by scanning a CW laser beam from the wide region toward the narrow region in a state that a polycrystalline silicon layer as a heat-retaining layer encloses the narrow region from a side face through the silicon oxide layer.

Abstract: An operating semiconductor layer is formed in such a manner that amorphous silicon layer is formed to be shaped so that it has a wide region and a narrow region and the narrow region is connected to the wide region at a position asymmetric to the wide region, and the amorphous silicon layer is crystallized by scanning a CW laser beam from the wide region toward the narrow region in a state that a polycrystalline silicon layer as a heat-retaining layer encloses the narrow region from a side face through the silicon oxide layer.

Abstract: A dental photopolymerizable type resin composition is provided, which comprises (a) a photopolymerizable compound that has therein at least one ethylenically unsaturated double bond and is a solid either crystalline or amorphous at 40.degree. C. or lower, (b) an inorganic filler, (c) a photopolymerization initiator, and (d) a reducing agent. That compound may be a mono- or poly-functional (meth)acrylate.