Ngk Spark Plug Company, Limited

Kaname Miwa

Tomonori Niwa

Jun Kurano

Akifumi Tosa

Hideaki Yagi

Katsuhiko Horii

Yasuhiko Inui

Yosuke Shinozaki

Shota Saito

A holding apparatus including a holding substrate having a first main face on one side in a thickness direction thereof, and a heat generation section which is disposed in the holding substrate and generates heat when energized. The heat generation section includes a plurality of first heating elements arrayed in a planar direction orthogonal to the thickness direction of the holding substrate, and a second heating element disposed on a side toward the first main face in the thickness direction with respect to the plurality of first heating elements. Any one of the plurality of first heating elements is electrically connected to the second heating element in series through a first via extending in the thickness direction within the holding substrate.

Holding apparatus

A holding device includes: a plate-shaped member having a first surface approximately orthogonal to a first direction; heat generating resistors and temperature measuring resistors disposed in respective segments formed by virtually dividing at least part of the plate-shaped member, the segments being arranged in a direction orthogonal to the first direction; and an electricity supply section that forms electricity supply paths for the heat generating resistors and the temperature measuring resistors. The holding device holds an object on the first surface of the plate-shaped member. The position of the temperature measuring resistors in the first direction differs from the position of the heat generating resistors in the first direction. A specific temperature measuring resistor that is at least one of the temperature measuring resistors includes a plurality of resistor elements disposed at different positions in the first direction and connected to one another in series.

Holding device

A multilayer heating body () includes a ceramic substrate (), an electrode (), heaters (), terminals (), and an electricity supply path (). Through vias which constitute the electricity supply path include at least one combination of through vias &#x3b1;, &#x3b2;, &#x3b3;, and &#x3b4; which meets the following conditions (1) and (2). Condition (1): when the ceramic substrate is viewed from the front surface (3) side toward the back surface (3) side, the through via &#x3b4; is located at a position where the through via &#x3b4; overlaps the through via &#x3b2;, or in the vicinity of the through via &#x3b2;. Condition (2): when the ceramic substrate is viewed from the front surface side toward the back surface side, the through via &#x3b3; is located at a position between the through via &#x3b1; and the through via &#x3b4;, or located at a position where the through via &#x3b3; overlaps the through via &#x3b1;, or in the vicinity of the through via &#x3b1;.

Multilayer heating body

An electrostatic chuck includes an anisotropic heat conductor which is disposed between an attraction substrate and a first heater member, and has an upper surface and a lower surface, and a coefficient of thermal conductivity which varies depending on directions. The anisotropic heat conductor is disposed so that the coefficient of thermal conductivity in a plane direction is larger than the coefficient of thermal conductivity in a thickness direction. Further, the electrostatic chuck includes metal layers which are joined to the anisotropic heat conductor so as to cover the upper surface and the lower surface of the anisotropic heat conductor, and an adhesive layer which is provided on a surface of each metal layer, and joins the metal layer to the attraction substrate or the heater member. Moreover, at least one of the metal layers is a fused metal layer formed by solidifying a melted metal.

Electrostatic chuck

A ceramic member, in a carrier device, including: a plurality of ceramic layers; a clamping electrode formed on a first ceramic layer among the plurality of ceramic layers and inside of the plurality of ceramic layers, and configured to attract a dielectric material by electrostatic force; an electric heating element formed on a second ceramic layer, which is more distant from a side holding a carried object than the first ceramic layer among the plurality of ceramic layers, and configured to generate heat using electric power; a power feed port; a land formed on a third ceramic layer among the plurality of ceramic layers, and configured to receive electric power through the power feed port; and a via arranged to pass through at least one of the plurality of ceramic layers and provided as a conductive material to electrically connect the electric heating element with the land.

Carrier device and ceramic member

A ceramic member, in a carrier device, includes: a plurality of ceramic layers that have insulating properties and are integrally sintered; a clamping electrode formed on a first ceramic layer among the plurality of ceramic layers and inside of the plurality of ceramic layers, and configured to attract a dielectric material by electrostatic force; a power feed port configured to receive a supply of electric power to the clamping electrode from outside of the ceramic member; a land formed on a second ceramic layer, which is different from the first ceramic layer among the plurality of ceramic layers, and configured to receive electric power through the power feed port; and a via arranged to pass through at least one of the plurality of ceramic layers and provided as a conductive material to electrically connect the clamping electrode with the land.

A flat limiting-current sensorincludes a solid electrolyte substrate, a negative electrodeand a positive electrode. The negative and positive electrodesand, respectively, are disposed on the same side of the solid electrolyte substrate. A voltage of 0.8 V is applied between the negative electrodeand the positive electrodein order to determine oxygen concentration. The ratio between the area of the negative electrodeand the area of the positive electrodeis set to 1:2, thereby reducing element resistance to 74% that of the case where the negative electrode and the positive electrode assume the same area. Thus, the measurement accuracy of the flat limiting-current sensoris improved.

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Komaki, Japan

Kaname Miwa