IP Library › Granted Patent US 12,515,225
Granted Patent B2
US 12,515,225 · App. 17/728,952 · Granted Jan 6, 2026

Digital microfluidics devices and methods of using them

Inventors: Jorge Abraham Soto-Moreno (San Francisco, CA); Ik Pyo Hong (Toronto, CA); Jair Giovanny Beltran-Vera (Bogota, CO); Juan Matias DeCarli (San Francisco, CA); Jobelo Andres Quintero Rodriguez (San Francisco, CA); Rodolfo Wilhelmy-Preciado (San Francisco, CA); Mais Jehan Jebrail (Toronto, CA); Gregory Ray (San Francisco, CA); Mathieu Gabriel-Emmanuel Chauleau (San Francisco, CA); Paul Mathew Lundquist (Emeryville, CA); Alejandro Tocigl (Mountain View, CA); John Peter Cannistraro (San Francisco, CA); Gareth Scott (San Francisco, CA); Spencer Seiler (San Francisco, CA); Rohit Lal (San Francisco, CA); Eugenia Carvajal (San Francisco, CA); Eduardo Cervantes (San Francisco, CA); Nikolay Sergeev (San Francisco, CA); Yu-Hung Chen (San Francisco, CA); Poornasree Kumar (San Francisco, CA); Foteini Christodoulou (San Francisco, CA)
Assignee: INTEGRA Biosciences AG
B01L3/502792C12M1/00C12M23/16C12M23/40H01L21/768B01L3/502715B01L2200/027B01L2200/04B01L2200/0605B01L2200/142B01L2300/023B01L2300/0867B01L2300/0883B01L2300/0887B01L2300/123B01L2300/161B01L2300/1822B01L2300/1827B01L2400/043B01L2400/0487B01L2400/049
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Quick Facts
Patent No.
US 12,515,225
App. No.
17/728,952
Granted
Jan 6, 2026
Kind
B2
Abstract

Digital microfluidic (DMF) methods and apparatuses (including devices, systems, cartridges, DMF readers, etc.), and in particular DMF apparatuses and methods adapted for large volume. For example, described herein are methods and apparatuses for DMF using an air gap having a width of the gap that may be between 0.3 mm and 3 mm. Also described herein are DMF readers for use with a DMF cartridges, including those adapted for use with large air gap/large volume, although smaller volumes may be used as well.

Claims (43)

1 . A cartridge for use with a digital microfluidics (DMF) reader apparatus, the cartridge having a bottom and a top, the cartridge comprising:

a flexible sheet of dielectric material having a first side and a second side, the first side forming an exposed bottom outer surface of the bottom of the cartridge;

a tensioning frame applying tension to hold the flexible sheet of dielectric material flat over the exposed bottom outer surface of the bottom of the cartridge so that the flexible sheet of dielectric material flexes under a vacuum of at least 50 kPa applied by the DMF reader apparatus to secure the flexible sheet of dielectric material against a plurality of drive electrodes on the DMF reader apparatus;

a top plate;

a ground electrode on the first side of the top plate; and

an air gap between the flexible sheet and the top plate, wherein the air gap comprises a separation of greater than 280 micrometers.

2 . The cartridge of claim 1 , wherein the ground electrode comprises a grid pattern forming a plurality of open cells.

3 . The cartridge of claim 2 , wherein the grid pattern of the ground electrode is formed of a non-transparent material.

4 . The cartridge of claim 2 , wherein a minimum width of the grid pattern between the open cells is greater than 50 micrometers.

5 . The cartridge of claim 2 , wherein the open cells of the plurality of open cells comprise a quadrilateral shape or an elliptical shape.

6 . The cartridge of claim 1 , wherein the ground electrode is formed of a conductive ink.

7 . The cartridge of claim 1 , wherein the ground electrode is formed of silver nanoparticles.

8 . The cartridge of claim 1 , wherein the ground electrode extends over more than 50% of the first side of the top plate.

9 . The cartridge of claim 1 , wherein the top plate comprises a plurality of cavities within a thickness of the top plate, further wherein the cavities are filed with an insulating material having a low thermal mass and low thermal conductivity.

10 . The cartridge of claim 9 , wherein the insulating material comprises air.

11 . The cartridge of claim 1 , further comprising a microfluidics channel formed on or in the second side of the top plate, wherein the microfluidics channel extends along the second side of the top plate and at least one opening between the microfluidics channel and the air gap.

12 . The cartridge of claim 1 , wherein the cartridge does not include a drive electrode on the flexible sheet of dielectric material.

13 . The cartridge of claim 1 , wherein the top plate comprises polycarbonate and/or acrylic.

14 . The cartridge of claim 1 , wherein the flexible sheet of dielectric is less than 30 microns thick.

15 . The cartridge of claim 1 , wherein the air gap comprises a separation of greater than 400 micrometers.

16 . A cartridge for use with a digital microfluidics (DMF) reader apparatus, the cartridge having a bottom and a top, the cartridge comprising:

a flexible sheet of dielectric material having a first side and a second side, the first side forming an exposed bottom outer surface of the bottom of the cartridge;

a tensioning frame applying tension to hold the flexible sheet of dielectric material flat over the exposed bottom outer surface of the bottom of the cartridge so that the flexible sheet of dielectric material flexes under a vacuum of at least 50 kPa applied by the DMF reader apparatus to secure the flexible sheet of dielectric material against a plurality of drive electrodes on the DMF reader apparatus;

a top plate having a first side and a second side and a thickness therebetween;

a ground electrode on the first side of the top plate;

an air gap between the flexible sheet and the top plate;

a microfluidics channel formed in or on the second side of the top plate, wherein the microfluidics channel extends along the second side of the top plate;

an opening between the microfluidics channel and the air gap; and

a cover covering the microfluidics channel, wherein the cover includes one or more access ports for accessing the microfluidics channel.

17 . The cartridge of claim 16 , wherein the microfluidics channel is configured to contain more than 1 ml of fluid within the microfluidics channel.

18 . The cartridge of claim 16 , wherein the microfluidics channel comprises a first microfluidics channel and the opening between the microfluidics channel and the air gap comprises a first opening, further comprising a second microfluidics channel formed in the second side of the top plate, wherein the second microfluidics channel extends along the second side of the top plate, and a second opening between the second microfluidics channel and the air gap, wherein the first and second openings are adjacent to each other.

19 . The cartridge of claim 18 , wherein the first and second openings are within about 2 cm of each other.

20 . The cartridge of claim 16 , further comprising a plurality of openings into the air gap from the top of the cartridge.

21 . The cartridge of claim 16 , wherein the top plate comprises polycarbonate and/or acrylic.

22 . The cartridge of claim 16 , further comprising one or more reagent reservoirs on the second side of the top plate.

23 . The cartridge of claim 16 , further comprising one or more freeze-dried reagent reservoirs on the second side of the top plate.

24 . A cartridge for use with a digital microfluidics (DMF) reader apparatus, the cartridge having a bottom and a top, the cartridge comprising:

a flexible sheet of dielectric material having a first side and a second side, the first side forming an exposed bottom outer surface of the bottom of the cartridge;

a tensioning frame applying tension to hold the flexible sheet of dielectric material flat over the exposed bottom outer surface of the bottom of the cartridge so that the flexible sheet may be secured by vacuum to the DMF reader apparatus;

a top plate having a first side and a second side;

a ground electrode on the first side of the top plate; and

an air gap between the flexible of dielectric material and the top plate,

wherein the cartridge does not include a drive electrode on the flexible sheet of dielectric.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 9, 2025
From: SOTO-MORENO, JORGE ABRAHAM; HONG, IK PYO; BELTRAN-VERA, JAIR GIOVANNY; DECARLI, JUAN MATIAS; RODRIGUEZ, JOBELO ANDRES QUINTERO; WILHELMY-PRECIADO, RODOLFO; JEBRAIL, MAIS JEHAN; RAY, GREGORY; CHAULEAU, MATHIEU GABRIEL-EMMANUEL; LUNDQUIST, PAUL MATHEW; TOCIGL, ALEJANDRO; CANNISTRARO, JOHN PETER; SCOTT, GARETH; SEILER, SPENCER; LAL, ROHIT; CARVAJAL, EUGENIA; CERVANTES, EDUARDO; SERGEEV, NIKOLAY; CHEN, YU-HUNG; KUMAR, POORNASREE; CHRISTODOULOU, FOTEINI
To: MIROCULUS INC.
Reel/Frame 071366/0528 →
Continuity (5)
Continuation 16259984 · Jan 28, 2019
Continuation PCTUS2018049415 · Sep 4, 2018
Provisional Application 62557714 · Sep 12, 2017
Provisional Application 62553743 · Sep 1, 2017
Related Publication 20220250078A1 · Aug 11, 2022
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