CERAMIC HEATER AND GLOW PLUG

PROBLEM TO BE SOLVED: To suppress generation of a clearance gap near an electrode portion in manufacturing a ceramic heater.SOLUTION: In a ceramic heater provided with a base including ceramic, and a resistor which is a resistor buried inside of the base, and including ceramic, and which has two lead portions extended in parallel with each other, a connecting portion connecting end portions respectively at one side of two lead portions, and an electrode portion which is formed integrally with the lead portion of at least one of two lead portions and extended in a direction intersecting an axial direction of the lead portion, and which has a basic end portion connected to the lead portion, a tip end portion exposed to an outer surface of the base, and a connecting portion disposed between the basic end portion and the tip end portion and connecting the basic end portion and the tip end portion. The cross-sectional shape of a virtual surface orthogonal to the extending direction of the electrode portion, of at least one of the basic end portion, the tip end portion and the connecting portion, is the streamline shape.SELECTED DRAWING: Figure 3 【課題】セラミックヒータ作製時に、電極部近傍に空隙が生じることを抑制する。【解決手段】セラミックを含有する基体と、基体の内部に埋設され、セラミックを含有する抵抗体であって、互いに平行に延在された２つのリード部と、２つのリード部における一方の端部同士を連結する連結部と、２つのリード部のうちの少なくとも一方のリード部と一体形成され、リード部の軸線方向と交わる方向に延在する電極部であって、リード部に接続されている基端部と、基体の外表面に露出している先端部と、基端部と先端部との間に配置されて基端部と先端部とを接続する接続部と、を有する電極部と、を有する抵抗体と、を備えるセラミックヒータであって、基端部と先端部と接続部とのうちの少なくとも１つの電極部の延在方向と直交する仮想面による断面の形状は、流線形である。【選択図】図３