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US 10,241,066 B2Granted
Microfluidic sensing device
AssigneeHewlett-Packard Development Company, L.P.
InventorsNicholas Matthew Cooper McGuinness, Melinda M. Valencia, Manish Giri, Chantelle Elizabeth Domingue, Jeremy Sells, Matthew David Smith
Life of this patent
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Abstract
A microfluidic sensing device comprises a channel and an impedance sensor within the channel. The impedance sensor comprises a local ground and an electrode within the channel. The local ground and the electrode are to form an electric field region that is elongated along the channel.
Claims16
A microfluidic sensing device comprising:
- a channel having
- an impedance sensor within the channel, the impedance sensor comprising:
- a local ground within the channel;
- and
- an electrode within the channel, wherein the local ground and the electrode are to form an electric field region that is elongated along the channel;
- a circuit to generate an electric field region using the electrode and the local ground of the impedance sensor;
- a thermal inkjet (TIJ) resistor to move fluid and particles through the channel;
- and
- a thermal sensor.
6 more elements
A method comprising:
- moving fluid containing particles within a channel of a sensing device using a bubble jet pump;
- forming a first electric field region within the channel;
- forming a second electric field region within the channel;
- sensing impedance changes in the first electric field region and the second electric field region during flow of fluid containing particles within the channel, wherein the first electric field region and the second electric field region have different sizes;
- and
- identifying particle characteristics based on the sensed impedance changes.
3 more elements
A microfluidic sensing device comprising:
- a platform supporting a channel;
- an impedance sensor within the channel, the impedance sensor comprising a local ground and an electrode, wherein the electrode and the local ground are separated by size varying gap across the channel;
- a circuit supported upon the platform to generate an electric field region using the electrode and the local ground of the impedance sensor;
- a thermal inkjet (TIJ) resistor supported upon the platform within 5 mm of the impedance sensor;
- and
- a thermal sensor supported upon the platform within 5 mm of the impedance sensor and the TIJ resistor.
3 more elements
A microfluidic sensing device comprising:
- a platform supporting a channel;
- an impedance sensor within the channel, the impedance sensor comprising a local ground and an electrode, wherein the local ground and the electrode are to form an electric field region that is elongated along the channel;
- a circuit supported upon the platform to generate an electric field region using the electrode and the local ground of the impedance sensor;
- and
- a piezo element pump supported upon the platform to move fluid and particles through the channel.
2 more elements
Dependencies are inferred from the claim text.