Abstract: A heater of this invention includes an insulating base made of a ceramic, a resistor buried in the insulating base, and leads connected to end portions of the resistor, in which both the resistor and the leads contain electrical conductors and insulating ceramic particles dispersed in the electrical conductors and the insulating ceramic particles contained in the resistor are smaller than the insulating ceramic particles contained in the leads.

Abstract: A heater includes: a ceramic body having a rod-like shape, including an end face and an outer periphery face; and a heat generating resistor embedded in the ceramic body, a surface roughness of the end face of the ceramic body being larger than a surface roughness of the outer periphery face of the ceramic body.

Abstract: A heater includes a resistor including a heat-generating portion, one or more leads joined to end portions of the resistor, and an insulating base body which covers the resistor and the leads, and a joining portion between the resistor and the leads includes a region where the resistor is spaced apart from the insulating base body by way of the leads over a whole circumference of the resistor when viewed in cross section of the joining portion.

Abstract: A heater of this invention includes an insulating base made of a ceramic, a resistor buried in the insulating base, and leads connected to end portions of the resistor, in which both the resistor and the leads contain electrical conductors and insulating ceramic particles dispersed in the electrical conductors and the insulating ceramic particles contained in the resistor are smaller than the insulating ceramic particles contained in the leads.

Abstract: A heater includes: a resistor including a heat-generating portion; a lead joined to an end portion of the resistor; and an insulating base covering the resistor and the lead. At a junction between the resistor and the lead, the lead has a shape thicker than the resistor and is connected to the resistor such that the end portion of the resistor is inserted into a front end portion of the lead, a recess is provided on an end surface of the resistor, and a portion of the lead is inserted into the recess.

Abstract: A heater includes: a resistor having a heat-generating portion; a lead joined to an end portion of the resistor; and an insulating base body covering the resistor and the lead, the lead being made to have a portion whose profile is narrowed toward a distal end on a heat-generating portion side of the lead, a joining portion of the resistor and the lead being a region where the resistor is spaced apart from the insulating base body through the lead as viewed in cross section perpendicular to an axial direction of the lead.

Abstract: A heater includes a resistor including a heat-generating portion, one or more leads joined to end portions of the resistor, and an insulating base body which covers the resistor and the leads, and a joining portion between the resistor and the leads includes a region where the resistor is spaced apart from the insulating base body by way of the leads over a whole circumference of the resistor when viewed in cross section of the joining portion.

Abstract: The ceramic heater used in a glow plug, which is used under harsh conditions, is required to be improved in durability. The ceramic heater 11 comprising: a heating resistor 13; a first lead member 15 and a second lead member 17; a first electrode lead-out member 19 and a second electrode lead-out member 21 electrically connected, respectively, to the ends of the first and second lead member opposite to the respective ends thereof that are electrically connected to the heating resistor 13; a ceramic base 23 in which the heating resistor 13, the first lead member 15, the second lead member 17, the first electrode lead-out member 19 and the second electrode lead-out member 21 are embedded; and a first electrode 25 and a second electrode 27 that are formed on the surface of the ceramic base, wherein in the first electrode lead-out member 19 the area S1 of the connection part with the first electrode is larger than the area S2 of the connection part with the first lead member.

Abstract: A ceramic heater and method of manufacturing of the ceramic heater are disclosed. A configuration and material composition of component parts of the ceramic heater allow the component parts to be formed together. Thereby, formation of cracks is reduced in a heat-generating resistor, leads, and a ceramic body. Uses of the ceramic heater may include an internal combustion engine glow plug.