Patent ID: 8509575

Claim:
A semiconductor optical modulation device comprising: a metal stem; a lead pin that penetrates through the metal stem; a first support block that is mounted on the metal stem; a temperature control module that is mounted on the metal stem; a first dielectric substrate that is mounted on a side surface of the first support block; a second support block that is mounted on the temperature control module; a signal line that is formed on the first dielectric substrate; a second dielectric substrate that is mounted on a side surface of the second support block; a signal conductor that is formed on the second dielectric substrate; a semiconductor optical modulation element that is mounted on the second dielectric substrate; a first bonding wire that connects the lead pin to an end of the signal line; a second bonding wire that connects the other end of the signal line to an end of the signal conductor; and a third bonding wire that connects another end of the signal conductor to the semiconductor optical modulation element.