Ceramic resistor and method for manufacture thereof
AssigneeK-Tech Devices Corporation
InventorShigeki Takaya
Life of this patent
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Abstract
A method for manufacturing a ceramic resistor wherein the resisting material of the resistor is a ceramic material prepared by a method comprising the steps of providing four or more types of substance, compound, or composite as starting raw materials, admixing the starting raw materials, forming the resultant mixture, and firing the formed material, characterized in that the admixing step is carried out in a mixing vessel (1) by the use of a first agitating blade (2) as a means for allowing the starting materials to flow over the whole mixing vessel and a second agitating blade (3) as a means for diaggregating the aggregates of the starting materials. The method can be employed for suppressing the variation of resistance values.
Claims13
A ceramic resistor comprising a ceramic acting as a resistor material comprising a compound and/or a complex compound which contain at least four metallic and/or metalloid elements,
- wherein the specific resistance of the resistor material is 1 kΩ·cm or less, and
- wherein the temperature coefficient of resistance of the ceramic resistor is −1150 ppm/° C. or more.
A ceramic resistor comprising a ceramic acting as a resistor material comprising a compound and/or a complex compound which contain at least four metallic and/or metalloid elements,
- wherein the specific resistance of the resistor material is in the range of 1 to 8 kΩ·cm, and
- wherein the temperature coefficient of resistance of the ceramic resistor is −1300 ppm/° C. or more.
A ceramic resistor comprising a ceramic acting as a resistor material comprising a compound or a complex compound which contain at least four metallic and/or metalloid elements,
- wherein the specific resistance of the resistor material is in the range of 8 to 30 kΩ·cm, and
- wherein the temperature coefficient of resistance of the ceramic resistor is −1450 ppm/° C. or more.
A ceramic resistor comprising a ceramic acting as a resistor material comprising a compound and/or a complex compound which contain at least four metallic and/or metalloid elements,
- wherein the specific resistance of the resistor material is in the range of 30 to 70 kΩ·cm, and
- wherein the temperature coefficient of resistance of the ceramic resistor is −1530 ppm/° C. or more.
A ceramic resistor comprising a ceramic acting as a resistor material comprising a compound and/or a complex compound which contain at least four metallic and/or metalloid elements,
- wherein the specific resistance of the resistor material is 70 kΩ·cm or more, and
- wherein the temperature coefficient of resistance of the ceramic resistor is −1620 ppm/° C. or more.
A method for manufacturing a ceramic resistor comprising a ceramic acting as a resistor material prepared by a mixing step of mixing starting materials including at least four metallic and/or metalloid simple substances, compounds, or complex compounds, and subsequently by forming and firing steps,
- wherein the mixing step is performed using means for allowing the starting materials to flow in a whole mixing vessel and means for breaking up an aggregate of the starting materials in the mixing vessel.
Dependencies are inferred from the claim text.