Patent ID: 8334481

Claim:
A mounting table structure comprising: a mounting table body made of ceramic, the mounting table body including a power-receiving conductor portion buried therein, a surface formed with a recessed connection hole and a connection terminal electrically jointed to the power-receiving conductor portion and exposed in the connection hole; a power-feeding line member provided with a power-feeding connector portion, a leading end of the power-feeding line member being inserted into the connection hole to feed electricity to the power-receiving conductor portion; and a support column for supporting the mounting table body, wherein the power-feeding line member passes through an internal space of the support column, wherein each of the connection terminal and the power-feeding connector portion is made of a metal or a metal alloy, and the connection terminal and the power-feeding connector portion are jointed together by a brazing material, consisting of an Au wherein the power-feeding connector portion and the power-feeding line member are connected to each other by thread coupling, wherein a female thread is formed in the power-feeding connector portion, and a male thread corresponding to the female thread is formed in an upper end portion of the power-feeding line member, wherein each of the connection terminal and the power-feeding connector is made of one or more materials selected from the group consisting of molybdenum (Mo), a molybdenum alloy, tungsten (W) and a tungsten alloy, wherein the brazing material is formed on the entire surface of an inner end of the connection hole such that the brazing material is in contact with a sidewall of the connection hole, wherein a width of the power-feeding connector portion is greater than a width of the connection terminal and a diameter of the power-feeding connector portion is smaller than that of the connection hole, and wherein a space surrounded by the sidewall of the connection hole, a sidewall of the power-feeding connector portion and the brazing material formed on the inner end of the connection hole exists in the connection hole.