Hermetic seal cover and manufacturing method thereof

The present invention provides a hermetic seal cover comprised of: a seal cover main body; and a Au-Sn brazing material fusion bonded to a surface of the seal cover main body, and is characterized in that a surface of the seal cover main body, onto which a Au-Sn based brazing material is fusion bonded, has a surface roughness defined by JIS B0601 of 0.005 to 0.25 m. It is preferable if the Au-Sn brazing material is fusion bonded after the seal cover main body is plated with Au. Au plating having a thickness of 0.003 to 0.05 m provides a seal cover capable of preventing a brazing material from flowing into a package during a sealing step.