Patent ID: 6393907
Filing Date: 2002-05-28
Classification: G01F

Abstract:
A thermo-sensitive flow rate sensor comprising:a flow rate detecting device having: a substantially planar substrate, a heating element made of thermo-sensitive resistor film and formed on a surface of said substantially planar substrate, and a cavity formed within said substrate by removing a part of said substantially planar substrate provided under said heating element to constitute a diaphragm for detecting a flow rate; a thin substantially planar member, attached to a back surface of said substantially planar substrate of said flow rate detecting device, to close said cavity; and a supporting element having a recess portion holding said flow rate detecting device on a top surface thereof said supporting element being arranged so that the top surface thereof is parallel with a direction of flow of a fluid to be measured, wherein said recess portion has a supporting face therein for supporting said flow rate detecting device, wherein said flow rate detecting device is accommodated in said recess portion and is supported with and fixed to said supporting face so that the top surface of said flow-rate detecting device is nearly flush with the top surface of said supporting element.