| 摘要 |
PURPOSE:To reduce a noise generated at an external lead terminal to a minimum and to reduce an attenuation of a signal to a minimum at the external lead terminal by a method wherein an insulating container is formed of a forsterite sintered substance or a zirconia sintered substance, the external lead terminal is formed of a metal of a specific physical property and a glass member is formed of a glass of a specific composition. CONSTITUTION:An insulating substrate 1 and a lid body 2 are formed of a forsterite sintered substance or a zirconia sintered substance; glass members 6, for sealing use, applied to opposite main faces of the insulating substrate 1 and the lid body 2 are formed of a glass composed of the following: 60.0 to 70.0wt.% of silica; 10.0 to 20.0wt.% of at least one kind of oxides of sodium and potassium; and 5.0 to 15.0wt.% of barium oxide. Regarding external lead terminals 5, their permeability is 200 (CGS) or lower, their electric conductivity is 10% (IACS) or higher and their coefficient of thermal expansion is 100 to 110X10<-7>/ deg.C. |
