The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 2019
Filed:
Jul. 11, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Nobuyuki Hirayama, Fujisawa, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
According to embodiments of the present invention, an element substrate capable of detecting a temperature immediately below a heater with high sensitivity is provided. The element substrate has a multilayer structure, and includes a heater, a first wiring below a position where the heater is provided, and a second wiring below the first wiring. The element substrate further includes a temperature detection element formed by series-connecting a first conductive via for connecting the first wiring and the second wiring, a constant electric current source which supplies a constant electric current, and a voltage detection circuit which detects a voltage obtained by supplying the constant electric current to the temperature detection element.