▎ 摘　　要

NOVELTY - A graphene nanoribbon comprises a semiconductor graphene nanoribbon (s1) having a width (w1) and a metallic graphene nanoribbon (s2) bonded to one end of the nanoribbon (s1) in a length direction and having a width (w2) larger than the width (w1). USE - Graphene nanoribbon used for semiconductor device (claimed). Uses include but are not limited to personal computer, supercomputer, server, smartphone, mobile telephone, tablet computer, sensor, camera, audio instrument, measuring apparatus, and inspection apparatus. ADVANTAGE - The graphene nanoribbon has predetermined length and width, and is stably prepared, and provides semiconductor device with high performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a semiconductor device, which consists of the nanoribbon (s1), the nanoribbon (s2), a metallic graphene nanoribbon (s3) bonded to the other end in the length direction of the graphene nanoribbon (s1) and having a width (w3) larger than the width (w1), an electrode (e1), and an electrode (e2) provided on the graphene nanoribbon (s2) and the graphene nanoribbon (s3); (2) manufacture of compound, which involves converting an amino group of a compound (c1) containing a group (Z') and an amino group of formula (1) into a group (Y') to synthesize a phenyl compound (c2) of formula (2) and converting hydrogen atom bonded to the carbon atom of the aromatic ring of the compound (c2) into a group (X) to synthesize a phenyl compound of formula (3); and (3) manufacture of graphene nanoribbon, which involves combining a polymer (p1) of formula (5) from the compound (3) by bonding desorption of mutual X group and the carbon atoms of the aromatic ring, in which the X group is detached, and combining a polymer (p2) of formula (6) from the polymer (p1) by bonding desorption of Y' group and carbon atoms of the aromatic ring, in which the Y' group is desorbed. = 1-3;and t = 0-4.