Ceramic heater and gas sensor element using the same
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United States of America Patent
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May 16, 2017
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app pub date -
Feb 9, 2015
filing date -
Feb 11, 2014
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Abstract
A ceramic heater has a plate substrate made of ceramic and a conductive layer. The conductive layer has a heating section and a pair of lead sections. When receiving electric power, the conductive layer generates heat. The lead sections are formed at one section on the plate substrate adjacent to each other in a width direction and formed along a longitudinal direction on the plate substrate. The heating section is formed to meander on the other section in the plate substrate and both ends of the heating section are connected to the lead sections, respectively. In particular, central sections formed at a central area of the heating section in the width direction and the longitudinal direction have a resistance value which is lower per unit length than a resistance value of other linear shaped sections of the heating section.
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