Patent ID: 11927555
Assignee: SIARGO LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. The fluidic concentration metering device of claim 1 wherein the micro-machined thermal time-of-flight sensing chip is made on a glass substrate and will have a thermistor as a micro-heater and have another multiple thermistors as sensing elements to downstream of the micro-heater, underneath the microheater and the sensing elements, a thermally isolated cushion made of parylene film of 7˜20 μm, each sensing element will be made of insert metals with high-temperature coefficients selected from the group consisting of platinum or nickel, or CMOS compatible materials consisting of doped polycrystalline silicon, surface of the sensing elements will be passivated with high thermal conductive materials selected from the group consisting of silicon nitride or silicon carbide, distances between the microheater and each of the sensing elements is to be within a few tens of micrometers, and to have the nearest sensing element at 20˜40 μm, the second sensing element is at 60 to 120 μm.