US Patent 7136543 Mount assembly, optical transmission line and photoelectric circuit board

A mount assembly which amplifies a light signal from an optical transmission line and transmits the light signal to another optical transmission line and does not require a highly precise perpendicularity at a connection portion between the optical transmission line and the mount assembly. The mount assembly (100) is obtained by connecting a photo-electro conversion device (10a), spherical semiconductor devices (12a) and (12b) and an electro-photo conversion device (10b) through electrical-connection portions (14) so that a light received by the photo-electro conversion device (10a) is amplified by the spherical semiconductor devices (12a) and (12b) and then emitted from the electro-photo conversion device (10b).