EP1163057A1 - Dipositif d'ejection de gouttes de liquide - Google Patents
Dipositif d'ejection de gouttes de liquideInfo
- Publication number
- EP1163057A1 EP1163057A1 EP00911001A EP00911001A EP1163057A1 EP 1163057 A1 EP1163057 A1 EP 1163057A1 EP 00911001 A EP00911001 A EP 00911001A EP 00911001 A EP00911001 A EP 00911001A EP 1163057 A1 EP1163057 A1 EP 1163057A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- cavity
- mass
- microfluidic system
- percussion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 46
- 238000009527 percussion Methods 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 230000035939 shock Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000000018 DNA microarray Methods 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002966 oligonucleotide array Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
Definitions
- the present invention relates to a device for ejecting drops of liquid.
- liquid drop ejection devices of the prior art include continuous jet devices and controlled drop devices.
- the latter the only ones concerned by the invention, are used in particular in ink jet printer heads. They are subdivided into two large families:
- a heating element 17 is disposed near the cavity 18 provided with an opening 19, and filled with a liquid 20 supplied by a pipe 21.
- Such devices are notably used in office applications. However, they involve a rise in temperature of the liquid medium, which can modify its characteristics and which is therefore incompatible with biological applications.
- the object of the present invention is to propose a device for electing drops of liquid making it possible to overcome the drawbacks of the devices of the prior art, by proposing a structure which is simple to produce and exhibits very rapid dynamics, supporting significant overpressures of the liquid. , without causing the temperature of the liquid to rise.
- the present invention relates to a device for ejecting drops of liquid comprising:
- a body provided with at least one cavity, filled with said liquid, and with an outlet for this liquid;
- Means for transmitting to the liquid a sufficient pulse to cause the ejection of at least one drop characterized in that the body is non-deformable and in that these means comprise means for striking a wall of said body.
- the invention can associate several orifices with the same cavity and the same striker.
- the percussion means comprise a metallic mass driven by an electromagnet, the mass then moving in the axis of the outlet orifice of the cavity.
- the cavity can be produced in a silicon substrate.
- the cavity can for example have a width of the order of a few millimeters and the orifice a width of about 200 ⁇ .
- the same cavity may have an opening with a width of approximately 60 ⁇ m.
- the consumable part of the device consists solely of the substrate. With such a consumable part, simple to produce, operating costs are minimized.
- the cavity forms a capillary located between an upstream microfluidic system and a downstream microfluidic system, the mass moving in a direction perpendicular to the cavity.
- the cavity then has a diameter of between a few micrometers and a few hundred micrometers.
- This first embodiment makes it possible to eject drops without adding a deformable membrane and without adding active elements machined on the substrate.
- the percussion device comprises at least one arm flexible which supports a mass and an electrostatic actuator.
- the cavity forms a capillary arranged between an upstream microfluidic system and a downstream microfluidic system.
- Such a second embodiment makes it possible to miniaturize the device of the invention.
- the device of the invention can have different dimensions, but it is particularly advantageous when it is miniaturized. It is then a question of ejecting drops of very small volume (less than mm 3 ).
- the device of the invention can then be developed using the same technology, for example a technology of the “silicon” type.
- the device of the invention can be used in many fields: for example the field of printer heads, the field of biology with micropipettes for dosing, or systems for depositing liquids or chemical or biological reagents on biochips, or the field of distributing a liquid in the form of droplets (injectors, etc.).
- FIG. 3 illustrates the liquid drop ejection device of the invention
- FIG. 5 and 6 illustrate two exemplary embodiments of liquid drop ejection devices, with percussion added according to the invention
- - Figures 7 and 8 illustrate two embodiments of liquid drop ejection devices, with integrated percussion according to the invention.
- the device for ejecting drops of liquid according to the invention comprises:
- non-deformable body 28 provided with a cavity filled with a liquid 27, and with one (or more) orifice (s), or nozzle (s) 29, this body having a solid wall 30;
- a device 23 for striking this wall 30, comprising a mass 24 moved by an actuator 25.
- the actuator 25 acts on the mass 24 so that it strikes the wall 30 in a movement along the axis of the nozzle 29.
- the propagation of the shock through the wall 30 and the liquid 27 causes the ejection of one (or more) drop (s) 26 of liquid.
- the physical phenomena involved could, in an ideal case, be assimilated to those of an elastic shock. They will be all the more so as the different parts of the device involved in the propagation of the shock will be less absorbent. In particular, a rigid wall will be more efficient in transmitting energy.
- the device is optimized so that the cavity does not deform under the impact of the striker and that energy is efficiently transmitted between the striker and the liquid.
- the device of the invention can be an attached percussion device, that is to say independent of the cavity containing the liquid.
- the percussion system 23 consists for example of a metallic mass 24 which is located in the field of an electromagnet 25. By the action of this, the mass can move in a reciprocating motion back and forth and strike the wall 30 thereby causing the ejection of drops of liquid 26.
- the body, which forms the head 36 can be produced in a silicon wafer or in any other machinable material, for example glass, quartz or plastic. It then has an orifice 29 whose nozzle shape is obtained by etching. It may also have another orifice, not shown in the figure, to allow a supply of liquid.
- the dimensions L (width of the body 28) and 1 (width of the orifice 29) can then be of the order of a few millimeters and approximately 200 ⁇ m respectively.
- the cavity has the shape of a capillary, produced in a substrate 40, located between an upstream microfluidic system 41 and a downstream microfluidic system 42.
- the percussion device 23 is then placed perpendicular to the cavity.
- the cavity can then have a diameter of between a few micrometers and a few hundred micrometers.
- a microfluidic system is a fluid handling system (pumps, filters, mixers ...), or a chemical or biochemical reaction system, or a measurement or detection system ....
- microfluidic systems are for example microfluidic systems for biological analysis. This is called “ ⁇ TAS” ( ⁇ Total Analysis System) or “Lab-on-ship”.
- the device of the invention can also be an integrated percussion device, by integrating the percussion device directly on the substrate of the cavity.
- the percussion device comprises flexible arms 45, for example membranes, which support a mass 46 and an electrostatic microactuator 47.
- the principle of electrostatic bonding is then used to strike the mass 46, which is also integrated into the substrate of the cavity.
- the flexible arms 45 can also be etched in the substrate.
- the electrostatic force being in 1 / d 2 where d is the air gap of the electrostatic actuator 47, speeds and therefore significant energies are obtained at the time of the impact.
- FIG 8 illustrates a variant of this embodiment using an upstream microfluidic system 54 and a downstream microfluidic system 55 arranged on either side of the cavity 48 in the form of a capillary.
- the microfluidic systems are then integrated into a support which acts as an intermediary between the mass and the capillary.
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Coating Apparatus (AREA)
- Nozzles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9903589 | 1999-03-23 | ||
| FR9903589A FR2791280B1 (fr) | 1999-03-23 | 1999-03-23 | Dispositif d'ejection de gouttes de liquide |
| PCT/FR2000/000684 WO2000056463A1 (fr) | 1999-03-23 | 2000-03-20 | Dipositif d'ejection de gouttes de liquide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1163057A1 true EP1163057A1 (fr) | 2001-12-19 |
| EP1163057B1 EP1163057B1 (fr) | 2003-05-21 |
Family
ID=9543522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00911001A Expired - Lifetime EP1163057B1 (fr) | 1999-03-23 | 2000-03-20 | Dipositif d'ejection de gouttes de liquide |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6722580B1 (fr) |
| EP (1) | EP1163057B1 (fr) |
| JP (1) | JP2002539965A (fr) |
| DE (1) | DE60002841T2 (fr) |
| FR (1) | FR2791280B1 (fr) |
| WO (1) | WO2000056463A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020106812A1 (en) * | 2001-01-26 | 2002-08-08 | Fisher William D. | Fluid drop dispensing |
| WO2002064255A1 (fr) * | 2001-02-15 | 2002-08-22 | Scientific Generics Limited | Jeu de biopuces |
| FR2930457B1 (fr) * | 2008-04-24 | 2010-06-25 | Commissariat Energie Atomique | Procede de fabrication de microcanaux reconfigurables |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4015914A (en) * | 1972-05-18 | 1977-04-05 | Delta Scientific Corporation | Metering pump wherein tubular pump is responsive to force impulses |
| JPS5581163A (en) * | 1978-12-13 | 1980-06-18 | Ricoh Co Ltd | Recorder |
| ATE53188T1 (de) * | 1985-08-06 | 1990-06-15 | Dataproducts Corp | Tintenstrahleinrichtung mit veraenderung des farbstoffzustandes. |
| SE465756B (sv) * | 1990-03-02 | 1991-10-28 | Qenico Ab | Anordning foer flaeckvis applicering av loedpasta, lim, e d, paa ett substrat |
| DE4314343C2 (de) * | 1993-04-30 | 1995-03-16 | Vermes Technik Gmbh & Co Kg | Vorrichtung zur Dosierung von Flüssigkeiten |
| US5423481A (en) * | 1993-09-20 | 1995-06-13 | The United States Of America As Represented By The Secretary Of The Navy | Meniscus regulator system |
| DK0923957T3 (da) * | 1997-11-19 | 2002-02-18 | Microflow Eng Sa | Dyseemne og væskedråbesprøjteindretning til en inhalator egnet til respirationsterapi |
-
1999
- 1999-03-23 FR FR9903589A patent/FR2791280B1/fr not_active Expired - Fee Related
-
2000
- 2000-03-20 EP EP00911001A patent/EP1163057B1/fr not_active Expired - Lifetime
- 2000-03-20 WO PCT/FR2000/000684 patent/WO2000056463A1/fr not_active Ceased
- 2000-03-20 JP JP2000606354A patent/JP2002539965A/ja not_active Withdrawn
- 2000-03-20 US US09/936,031 patent/US6722580B1/en not_active Expired - Fee Related
- 2000-03-20 DE DE60002841T patent/DE60002841T2/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0056463A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2791280A1 (fr) | 2000-09-29 |
| DE60002841T2 (de) | 2004-01-22 |
| US6722580B1 (en) | 2004-04-20 |
| DE60002841D1 (de) | 2003-06-26 |
| EP1163057B1 (fr) | 2003-05-21 |
| WO2000056463A1 (fr) | 2000-09-28 |
| FR2791280B1 (fr) | 2001-04-13 |
| JP2002539965A (ja) | 2002-11-26 |
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