Patent ID: 8468883
Filing Date: 2013-06-25
Classification: G01F,Y10T

Abstract:
1. A thermal type fluid flow sensor for measuring an air flow, which is formed on a substrate, comprising: a humidity detecting portion; and an air flow detecting portion, wherein the humidity detecting portion includes: a first heat generating resistor; an air cavity layer on an upper side of the first heat generating resistor; and a first film formed above the air cavity layer, wherein the air flow detecting portion includes: a second heat generating resistor; and a plurality of temperature measuring resistors provided on at least one of an upstream side and a downstream side of the second heat generating resistor to interpose the second heat generating resistor within a face in parallel with a main face of the substrate; a temperature measuring resistor for the second heat generating resistor, and wherein the first film has a plurality of holes reaching the air cavity layer from an upper face of the first film.