Patent ID: 11860016
Assignee: LAM RESEARCH CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 21:
22. A flow control system comprising:
N mass flow controller assemblies arranged in parallel, where N is an integer greater than one, each mass flow controller assembly comprising:
a housing defining a cavity, a plurality of internal passages, a first inlet, a first outlet, a second inlet, and a second outlet;
a valve connected to the housing, having an inlet fluidly coupled to the second outlet of the housing and an outlet fluidly coupled to the second inlet of the housing, wherein the valve is configured to control fluid flow from the second outlet of the housing to the second inlet of the housing; and
a microelectromechanical (MEMS) Coriolis flow sensor arranged in the cavity, including an inlet fluidly coupled by at least one of the plurality of internal passages to the first inlet of the housing and configured to measure at least one of a mass flow rate and density of fluid flowing through the MEMS Coriolis flow sensor,
wherein an outlet of the MEMS Coriolis flow sensor is fluidly coupled by at least one of the plurality of internal passages to the second outlet of the housing, and
wherein the second inlet of the housing is fluidly coupled by at least one of the plurality of internal passages to the first outlet of the housing; and
a first valve connected to first inlets of the N mass flow controller assemblies,
wherein outlets of the N mass flow controller assemblies are connected together;
wherein the housing includes:
a first housing portion;
a second housing portion connected to the first housing portion; and
a third housing portion connected to the second housing portion,
wherein the cavity is defined by the second housing portion and the third housing portion;
wherein the valve is connected to the third housing portion; and
wherein a printed circuit board is connected to the third housing portion adjacent to the valve.