Patent ID: 6886402
Filing Date: 2005-05-03
Classification: F02D,G01F,G01K

Abstract:
1. A gas flow rate and temperature measuring element comprising: a flat substrate; a flow rate detector portion made of a thermosensitive resistor film formed on a front surface of said flat substrate; a gas temperature detector portion made of a thermosensitive resistor film formed on said front surface of said flat substrate so as to be separated from said flow rate detector portion; flow rate detection and gas temperature detection electrode terminals formed on an end portion of said front surface of said flat substrate across said flow rate detector portion from said gas temperature detector portion; flow rate detection wiring formed on said front surface of said flat substrate so as to connect said flow rate detection electrode terminals and said flow rate detector portion; gas temperature detection wiring formed on said front surface of said flat substrate so as to connect said gas temperature detection electrode terminals and said gas temperature detector portion; and cavities formed from a rear surface side of said flat substrate under said flow rate detector portion and said gas temperature detector portion, respectively, wherein said gas temperature detection wiring is provided with: a first wiring portion disposed parallel to and in close proximity to said flow rate detector portion for a length substantially equivalent to a length of said flow rate detector portion; and a second wiring portion disposed so as to extend from said first wiring portion to said gas temperature detector portion, a high-thermal-resistance portion being formed in at least a portion of said second wiring portion.