Patent ID: 11965762
Assignee: FLUSSO LIMITED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A flow sensor comprising:
a first substrate comprising an etched portion, wherein the etched portion extends towards a first side of the first substrate from a second side of the first substrate, wherein the first side of the first substrate and the second side of the first substrate are opposite sides;
a dielectric region located on the first side of the first substrate, wherein the dielectric region comprises at least one dielectric membrane located over the etched portion of the first substrate;
a fluid flow sensor located on or within the dielectric membrane;
a second substrate adjoining the second side of the first substrate, wherein the first substrate and the second substrate cooperate to form a sensing channel through the flow sensor, and wherein the second substrate comprises a protrusion extending towards the dielectric membrane, wherein at least one region of the second substrate that is adjacent to the protrusion is substantially parallel to the second side of the first substrate; and
a flow inlet channel forming a first portion of the sensing channel and a flow outlet channel forming a second portion of the sensing channel, wherein the second substrate comprises two opposing surfaces, and wherein one of the opposing surfaces is adjacent to the sensing channel, the flow inlet channel and the flow outlet channel, and wherein the flow inlet channel and the flow outlet channel are formed at a boundary between the first substrate and the second substrate.