TW201107047A - Dispensing method and device for dispensing - Google Patents

Abstract

A method of providing a layer of a first fluid on an area (2) of a surface by means of a dispenser (3) having an opening (8). The method comprises the step of providing a layer of a second fluid (7) on the surface, the second fluid being immiscible with the first fluid. It also includes the step of arranging the opening of the dispenser in the second fluid above the area and the step of dispensing the first fluid (6) through the opening assisted by a third fluid (9) for settling on the first area, the third fluid being immiscible with the first fluid.

Description

201107047 IX. Description of the Invention: [Technical Field] The present invention relates to a method of providing a layer of a first fluid on a first region of a surface by means of a dispenser. The invention also relates to an apparatus for carrying out the method. [Prior Art] The international application WO 2005/098797 discloses a method of providing an oil layer on one of the surfaces of a substrate, which is particularly suitable for the manufacture of electrowetting displays. The surface is initially covered by a layer of water. A dispenser has its opening in and over the aqueous layer. An oil system is fed into the dispenser and an oil droplet is formed between the opening and the surface. The surface includes a first hydrophobic region surrounded by a second hydrophilic region. As the dispenser moves over the surface, the oil droplets are dragged over the first and second regions and the water on the first regions is replaced by an oil layer and the water is retained in the second regions on. One of the disadvantages of this method of providing an oil layer is that it is difficult to control the thickness of the oil layer. One object of the present invention is to provide a method that allows for easier control of the thickness of the oil layer. SUMMARY OF THE INVENTION The object is achieved by a method of providing a layer of a first fluid on a first region of a surface by a first dispenser having an opening. The method comprises the following steps: Providing a layer of a second fluid on the surface, the second flow system being incompatible with the first fluid; - disposing the first dispenser in the second fluid over the first region 130008.doc 201107047 Opening;

- dispensing the first fluid through the auxiliary opening for precipitation on the field; / (HE - assisting the dispensing by a third fluid, the third flow system being incompatible with the first fluid. - the third fluid provides an additional degree of freedom to control deposition of the first fluid on the surface. In other words, the third fluid can be used to remove

The voids of, for example, air trapped on the surface during the second fluid layer are removed to improve the deposition of the first fluid on the surface. The compatibility ensures that only the first fluid is deposited without including the auxiliary third fluid and the effect of the third fluid is not affected by mixing the first fluid. In the case where the second fluid is also incompatible with the first fluid, the stability of the method is increased. " In a first embodiment of the method, a second dispenser is used to apply the second fluid, and the second dispenser has an opening disposed in the second fluid. Removal of the trapped holes can be performed independently of providing the first fluid layer. For example, the second dispenser can be scanned one or more times on the surface and then one or more scans of the first dispenser are performed. When the second and second flow systems are incompatible, mixing of the second and third fluids will be avoided. The third fluid is permeable to the opening of the second dispenser to form a droplet of the third fluid between the opening and the surface. The droplets are shown to effectively remove holes such as air trapped on the surface. The second dispenser having an opening disposed within the second fluid can also be applied independently of the first dispenser and the first fluid can be used to remove (eg,) air from the surface 130008.doc 201107047 hole. The second applicator can scan the surface prior to the first applicator, but advantageously the first applicator scans the surface prior to the second applicator. When the first fluid layer has been deposited on the surface, the trapped holes are more likely to be removed by the droplets of the third fluid than when the first fluid has not been deposited. Moreover, it makes the thickness of the deposited layer of the first fluid more uniform. In a second embodiment of the °H method, the third flow system is applied through the opening of the Q 帛16 adapter. In this case, the amount of the third fluid and its position can be adjusted to affect the amount and manner of deposition of the first fluid. It allows for improved control of one of the thicknesses of the deposited first fluid layer, particularly the uniformity of thickness. In a particular form of the second embodiment, the method comprises the steps of: - dispensing the third fluid through the opening π of the dispenser to form a small one of the third fluid between the opening and the surface And gamma is applied to the first fluid through the opening π for moving along the interface between the second fluid and the third fluid of the crucible 35 and depositing on the first region. The interface between the third fluid droplet between the opening and the surface of the finely-matched surface and the second body provides a path for the first fluid to move from the dispenser - σ to the surface. The amount of first fluid deposited on the first-regions is controlled by the size of the droplets. - The larger size drops provide a thicker first fluid layer on the first zones. The filling can be precisely controlled so that for many applications it is no longer necessary to level the deposited first layer by filling, for example, a squeegee. The first region of the field will improve the deposition of the first fluid for the second fluid having a lower wettability for the S_fluid of 130008.doc 201107047. The difference in wettability promotes replacement of the second fluid by the first fluid on the surface. The first, second and third fluids may be liquid. In a particular embodiment of the method, the first flow system H body, the second fluid system - the second liquid and the third flow system - gas. An interface between the gas and the second liquid forms a preferred quality path for the first liquid to move from the dispenser to the surface. Ο ❹ When the second flow system is polar or electrically conductive, the surface having the first and second fluids and forming part of the substrate is particularly suitable for use in a switchable optical component, such as an electrowetting display. The gas may be m gas, which just forms a preferred droplet. When the second fluid layer is applied to the surface by displacing the second fluid or slamming A- & L 魈 and hunting in the second fluid by immersing the object having the surface in the second fluid The void may be trapped on the first region due to the lower wettability of the second fluid during the first fluid, and the air droplet between the dispenser and the surface will Hole cavitation is intercepted whereby air voids are released from the first region and the entire region is available for the first fluid. When the dispenser moves over the surface, the droplet operates as a one of the air pockets of the material (4). The method may be advantageously used to apply a first-fluid-on-surface on which the first-region has an adjacent second region, the second region having a second fluid ratio for the first fluid A higher wettability. Since the i/door spread 14 difference, the first fluid will be biased to adhere to the first regions without adhering to the second regions. Similarly, the second fluid will remain adhered to the second regions 1308000.doc 201107047 and drive away from the first regions. Thus, the first regions will be covered by a layer of the first fluid, the thickness being additionally dependent on the size of the droplets, and the second regions will still be covered by the first fluid. When the size of the first region is small, the deposited first fluid may take nearly one half of the spherical boot. Such curved deposition systems are also covered by the term "one layer of the first fluid". Ο

When the maximum dimension of one of the openings of the first and/or second dispenser is less than the minimum dimension of the first region, the regions can be accurately filled to obtain the desired thickness of the first layer. It is different for different first-areas. When the maximum dimension of one of the openings of the first and/or second dispenser is greater than the minimum dimension of the first region, a plurality of adjacent first regions may be simultaneously filled, thereby allowing for an increase in deposition speed. An opening having an elongated shape allows the first region to be filled in the sweep of one of the first dispensers, and the second is to sweep the air to remove the air. The area or area pattern can be filled by gradually or continuously moving the dispenser over the area within a grid pattern. By using the over-extension dispenser on the table, the filling requires less movement and can accelerate the sinking.

Product program. The edge of the droplet, the I-join boundary (ie, the first and second flows on the surface: the normal of the droplet on the interface line is not parallel to the direction of movement) may cause a local thickness of the deposited layer Inhomogeneity. The elongation application boundary is on the first outer portion of the above (4) to be deposited to thereby avoid uneven thickness of the deposited layer on the first-regions 130008.doc -10·201107047. When the opening of the first dispenser is moved relative to each other in a direction (preferably qualitatively perpendicular to the elongated axis of the elongated shape), a maximum area is covered by a single sweep of the dispenser A: The method is particularly suitable for depositing a - layer on a surface comprising a plurality of _ regions separated by a second region and forming a pattern. ^ is dispensed from a dispenser having an elongated opening In the case of the first fluid, a uniform thickness of the bismuth layer is obtained. Preferably, the long axis of the elongated shape of the opening has a length equal to the size of one of the patterns parallel to the long axis of the § If the first-flow system is deposited in two or more sweeps On the pattern and the portion of the droplet passes over a first region twice, the thickness of the layer deposited on the first region will be different from the first region in which the droplet only passes once. Therefore, the thickness is in the pattern system. The filling in one sweep of an elongate dispenser will be more uniform than in a few sweeps of a smaller dispenser. In a particular embodiment of the method, in a first region and a third A boundary line between the two regions forms a different angle from zero with respect to a local direction of a leading interfaee between the second fluid and the third ground region crossing the boundary line. When at the first and/or Or when the first interface between the second dispenser opening and the 6-layer interface forms a line contact with a boundary line between the first and second regions, the fluid interface tends to be fixed to the boundary line, causing deposition The thickness of a fluid layer is not uniform. When the boundary forms a non-zero angle with the interface, there is no longer any line contact, but only a little contact, so that almost no fixation is shown. Thus, the first fluid layer is deposited. thickness More uniform. One or more angles cause a significant uniformity change 130008.doc -11 - 201107047 Good ρ for an angle of 20 and above, excellent uniformity is obtained. When the dispenser opening is rectangular The local direction of the leading interface is parallel to the long axis of the opening. Therefore, a rectangular pattern of one of the first regions should be arranged, the boundary of which is at a non-zero angle to the long axis.

The above oblique scanning not only facilitates a three-fluid deposition method, but also improves the thickness uniformity of the deposited layer for a two-fluid deposition method in which the first fluid is dispensed in the second fluid without applying the third flow. . This advantage is also applicable to dispensers that do not use the second fluid to deposit the first fluid or only apply the third fluid within the second fluid. In the latter case, the direction of the leading interface between the second fluid and the third fluid is related rather than the direction of the leading interface between the second fluid and the first fluid. The first dispenser can scan once on the surface to deposit a first fluid layer. When the first dispenser is scanned two or more times on the surface, a greater layer thickness uniformity is obtained. During the first scan, the first flow system is deposited on the surface; during a subsequent scan or a plurality of scans, the first flow system replenishes the first fluid by depositing too little in the first scan and by The first fluid is removed to be redistributed on the surface when it is excessive. If a first and second dispenser is used, then one or more scans of the second dispenser after the first dispenser also increase thickness uniformity. When the surface is a portion of the first substrate and provides a second substrate, the first substrate and the second substrate are defined to have a space between the first fluid and the second fluid. The surface of the second fluid layer can be converted into a closed system. The first aspect of the present month relates to an apparatus comprising a first application 130008.doc -12- 201107047 orchester having an opening for use on a first region of a surface using the method according to the invention A layer of a first fluid is provided. In a first embodiment of the apparatus, a second dispenser having an opening for applying the third fluid is provided. In a second embodiment of the apparatus, the first dispenser has a first input for the first fluid and a second input for the third fluid to allow control of the amount of the first fluid The size of the third fluid droplet, thereby controlling the amount of first fluid deposited on the surface. In a particular embodiment of the apparatus, the opening of the first and / or second dispenser is elongated. Advantageously, the apparatus includes a moving platform for moving the dispenser and the surface relative to each other. When the apparatus includes a controller for controlling the first fluid and the third fluid, the thickness of the deposited first fluid layer can be controlled to increase the thickness accuracy of the deposited layer. The controller can control the amount of the first fluid and/or the third fluid. The input for the controller may be provided by a measuring device that determines the thickness of the deposited layer or by a measuring device that determines the shape and/or size of the third fluid droplet. The controller can also use manual wheeling from an operator of the device. BRIEF DESCRIPTION OF THE DRAWINGS The following description of the preferred embodiments of the present invention is intended to [Embodiment] Figure 1 is a cross-sectional view showing a first embodiment of an apparatus for dispensing a first fluid on a surface in accordance with the present invention. A plate has a surface 130008.doc -13 - 201107047 face 2 on which a layer of a first fluid will be deposited. The dispenser is moved in the direction 5 on the surface, and the injection thief has a center channel 4. The first fluid 6 is supplied through the passage 4. Surface 2 consists of a -, and a threat. Covered by the layer of the first fluid-7. The needle has a circular opening 8 that is operatively located within the second fluid and above the surface 2. A third fluid 9 is partially located within the passage 4 and partially between the opening 4 and the crucible surface 2. The third fluid forms a droplet 10 between the opening 4 and the surface. The droplet 10 can partially abut the surface 2. The first fluid 6 moves as a relatively thin layer along the interface (10) of the second fluid 7 and the third fluid 9 = the injector 3 to the surface 2 where it (10) becomes the layer 12. a leading interface between the second fluid 7 and the first fluid 6: „3 pushes the second fluid and replaces it with the first fluid. This remains on the surface of the surface after passing the dispensing The thickness of the layer is additionally dependent on the width of the opening 8, its shape, the speed of movement of the dispenser, the distance between the surfaces of the openings 8 and the surface, the viscosity of the fluids and the size of the droplets, and the amount of the second and third fluids. Interfacial tension and chemical difference of various interfaces, that is, the difference in hydrophobicity between the fluid and the various combinations of the surface and the dispenser. The first fluid 6 may be a hydrocarbon (for example, a sixteen appearance) or an oil (9) such as a furnace. The specific embodiment uses a material. The second fluid can be any fluid that is incompatible with the first fluid. The second fluid may be polar or electrically conductive. And some applications of the plate covered by the second fluid are more useful. The particular embodiment shown uses water as the second fluid. The third fluid continues to be advantageous while simultaneously being incompatible with the first fluid and the second fluid to stabilize The droplet. The third fluid may A gas, such as air, nitrogen 130008.doc -14-201107047 gas or argon. This embodiment uses air as the third fluid. Other immiscible flow systems may be used, fluorocarbons and liquid metals (e.g., mercury). When the surface has a higher wettability for the first fluid than for the second fluid, helium promotes deposition of the first flow on the surface. In the illustrated embodiment, the plate can be hydrophobic The layer is covered, for example, an amorphous gas-containing polymer, such as AF 1600. The hydrophobic layer adds the tendency of the oil to adhere to the surface and repel the water. 施加 Applying the third fluid as shown in Figure 1 can be followed by Subsequent steps are implemented. The first fluid is used to fill the syringe; a quantity of air is introduced into the main emitter, the syringe is inserted into the layer of the second fluid 7, and the fluid is pushed out of the syringe. The size of the drop is determined by the amount of air in the syringe and the properties of the first and second fluids. The syringe can be used as a reservoir for the first liquid and (four) with the first amount of fluid required. Pu institutions to replace Figure 2 shows a top view of a dispenser for dispensing the first fluid raft on a patterned surface. The case 20 contains a first region 21, which in this particular embodiment is a square, A fluid 6 has a greater wettability than the second fluid 7. The squares can be made of an AF 16 layer. An adjacent region 22 is for the second fluid ratio for the first fluid The region 22 can be made of a layer of various materials, including - photoresist (for example). In the figure, the maximum size of the opening σ8 of the needle is less than the minimum size of the square. The size of the needle allows filling only the selected first region of the pattern. When the first fluid is deposited on the first region, the spread of the first fluid layer is limited by the second region, the second region repels the The first stream 130008.doc •15- 201107047 body. The second zone is formed by arranging a separate layer in the form of a shape of the second region on the uninterrupted layer of the first region. When the first region is hydrophobic, the separation layer should be hydrophilic. The cleavage layer can be formed by, for example, a printing method or evaporation. The first region may also be formed by a wall having a height that mechanically constrains the first fluid to the first region. Figure 3 is apparently used to dispense the first flow on a surface having a pattern

Top view of the body & The pattern 3A includes a first area 31 and a second area 32. The needle 33 has an opening 34' which has a maximum dimension (i.e., a constant length) that is larger than the smallest dimension of one of the first regions (i.e., the length of one side of the first region). As the shaw opening moves over the pattern on the surface, a plurality of first-regions are simultaneously covered by the first fluid, thereby increasing the deposition speed of the device. The first fluid is biased adjacent to the first _-region and is repelled by the second region because of its different wettability. Depositing the first fluid through the second fluid layer has several advantages. It reduces the splash of the first fluid. It reduces surface contamination due to the environment. The depleted material does not tend to block through the environment to the second fluid. The presence of the second fluid makes it easier to localize the deposit. The second fluid causes the fluid to be less exposed to oxygen in the air, thereby reducing the first fluid emulsification. If + the second fluid layer is present and the first flow is deposited, the first fluid will be fixed to the impurities on the second region. When the second fluid X contacts the second region prior to depositing the first fluid, the first fluid is less likely to be immobilized to the impurities 因为 because the second fluid must be repelled from a smaller region around the impurities. I30008.doc -16- 201107047 When the second fluid layer is applied to the surface, air may be trapped on the surface, particularly on the first region adjacent the boundary of a second region. When the dispenser sweeps across the first region and the droplet is filled with air, the trapped air will merge with the droplet and its position on the first region will be occupied by the first fluid. The droplet operates as an air cleaner for the surface. After depositing the first fluid on the surface, the plate having the first and second fluid ports can be used, for example, an electrowetting device, such as a display device, an optical component, and an adjustable iris or an adjustable lens. . The second fluid can also be removed after the first fluid deposition and a plate having only the first fluid is used in an application. Figure 4 shows a device having an elongate dispenser for depositing a layer of a first fluid fluid through a layer of a second fluid water provided on the surface and assisted by a third fluid air. The figure shows everything through the dispenser and the plate. The dispenser may be closed on the shorter side by two vertical walls. The dispenser 40 has a U shape with its opening 41 facing the surface 42 of a plate 43. The δH opening is below the surface of the second fluid. The interface between the second fluid and the environment is not shown. The dispenser has a first input in the form of a tube 44 for feeding the oil into the dispenser; and a second input in the form of a tube 45 for controlling the air. A longer dispenser may have two or more first inputs and/or second inputs that are regularly spaced apart by the length of the dispenser to improve control of the fluids. The air forms an elongated droplet 46 surrounded by an oil layer 47. The width of the opening 〇 is less than 10 mm, for example 2 mm. When the opening is wider than 1 mm, 130008.doc • 17-201107047 oil tends to escape from the opening and move upwards in the water. The opening distance above the surface is preferably less than 2 mm, and in a particular embodiment is 0.1 mm. A smaller opening facilitates filling of the dispenser by capillary force through the first fluid. The dispenser has a hydrophobic surface on the inner wall 48 and on the wall portion 49 of the adjacent opening 41. This hydrophobic property fixes the oil to the dispenser. At least a portion of the outer wall 5 of the dispenser adjacent to the water is hydrophilic to avoid oil staining. The dispenser can be made of slightly hydrophobic PMMA. This material has the advantage of a high contact angle hysteresis to improve the potential stability of the oil. Although the first fluid is attached to the two outer edges of the wall portion in the towel, it may also be attached to the two inner edges of the wall portion. Hysteresis refers to the difference in contact angle after the movement of the fluid before and after the boundary. During the deposition procedure, the dispenser moves in a direction 51 that is substantially perpendicular to the long axis of the opening 41, thereby moving a leading interface 52 between the water and the oil on the surface 42. The surface includes a region pattern 53, and each region may be a - region or a - region and a second region sub-pattern. For example, each sub-pattern may be a display device, and two or more display devices are in a parallel The surface is disposed on the surface in the direction of the long axis of the dispenser. Further, a pattern or sub-pattern may have a shape that conveys a meaning to a view (4), such as a logo. This sub-pattern may combine another sub-pattern for a display function while also providing ticket work 35. In a display device, the pattern or sub-pattern can be switched or water-repellent as a common display element, i.e., non-switchable. In another embodiment, the pattern or sub-pattern provides a decorative effect, for example to enhance the viewer experience. 130008.doc -18- 201107047 The length of the opening is substantially the same as or greater than the size of the pattern parallel to the long axis of the opening. The length should be at least large enough that any deposition irregularities caused at the boundaries of the droplets 46 will occur outside of the pattern. The length of the opening may be substantially equal to the size of the surface in a direction perpendicular to the scanning direction. The area between regions 53 is preferably hydrophilic, such as covered by SU8 to avoid depositing oil in this region of the surface. In a particular embodiment of the apparatus of Figure 4, the oil front interface μ is traveling parallel to the boundary 54 between the first region and the second region. Since the oil 47 does not wish to abut the second region, the shape of the oil under the dispenser is disturbed along the line of contact from the hydrophobic region to the hydrophilic region. Fixing the oil on the boundaries causes a stick-slip movement during movement of the dispenser over the surface, which may result in a strip of oil deposit. Figure 5 (a) shows a first orientation of the dispenser 6 〇 relative to one of the surfaces of the pattern 61 having the first and second regions disposed on the -plate 62. The scanning direction is indicated by arrow 63. The first orientation is the same as the orientation shown in FIG. Figure 5(b) shows a second orientation in which the orientation of the panel 62 is rotated with the pattern 61 at an angle of about 8 degrees as compared to the orientation in Figure 5(a). The adapter front interface 52 is now at the same 8 degree angle as the boundary 54. Since the interface no longer has a line contact with the boundary and only has a single contact, the fixing effect is strongly reduced and the thickness of the deposited layer is more uniform than in the case of Fig. 5(a). Uniformity improvement was observed for angles greater than 5 degrees and uniformity was not significantly improved for angles greater than 22.5 degrees. Fig. 5(c) shows an alternative I1 group i in which the plate 63 has one of its edges parallel to the applicator 6〇 and the pattern 64 has a boundary which is at an angle unequal to zero with the front interface of the dispenser. 130008.doc -19- 201107047 Used for - Straight, Elongate Dispenser Before the interface is straight The side of the long axis of the applicator opening. The person in the direction of the glaze. When the opening of the dispenser is deflected in a plane parallel to the surface, the leading interface will also be curved. In order to avoid the above-mentioned hysteresis motion, the local direction of the leading interface should form a non-zero angle with the direction of the boundary lines. • _ (d) use three fluids for the filling procedure to illustrate the oblique filling of Figures 5(b) and (4), but it may also be advantageous to use it to distinguish the first flow system from the inner surface of a second fluid. The filling method occurs because of a similar hysteresis motion in this case. In a single fluid filling method t, the oblique filling is similarly advantageous, wherein a first-class system is deposited on the surface by air or vacuum. Figure 6 shows a section of a series of electrowetting elements produced using the deposition method in accordance with the present invention. A first substrate 7A has an electrode 71 deposited as a thin film conductor on the substrate. Each electrode is connected to a line 72 for providing a voltage 彳s. The electrodes are covered by a thin hydrophobic layer 73 of amorphous fluoropolymer AF 1600 1600. A pattern of a thin SU8 hydrophilic layer 74 defines the surface of the substrate within the first hydrophobic region 75 between the second hydrophilic regions 74. The size of the first area is! 6 〇 square microns, the second • regions have a 10 micron width and a 3 to 6 micron height. The first substrate 70 having the layers - 71, 73 and 74 undergoes a deposition method in accordance with the present invention using oil as the first fluid, water as the first fluid, and air as the third fluid or another fluid combination. After the method is implemented, the first regions 75 are uniformly covered by an oil layer 76. The oil layer has a thickness of between 3 and 6 microns, e.g., 5 microns. The second regions 74 and the oil layer are covered by water 77 130008.doc • 20· 201107047. The water may contain an eyelash to increase its conductivity and increase the temperature window used for the method. The second fluid (water in this example) used during the method, such as the gate & /±, is preferably the same fluid used in the product comprising the substrate to avoid being protected by another fluid The second fluid is changed after the method is performed. - The second substrate 78 is formed between the first and second substrates by a closed 工 inter-working chamber which is protected from the environment by a seal (not shown) attached to the two substrates. The pattern of layer 74 defines an element defining an oil layer 76 on the substrate. Each element has an -electrode 71. The other electrode 79 connected to a signal line 8 turns into contact with water 77' to form a common electrode for a plurality of elements. When a voltage is applied between the common electrode 79 and the electrode 71 of the plurality of pieces, the oil layer 76 in the element moves to the side of the element or is broken, and then the first surface will be at least β-shaped by the water 77. Covered. This so-called electrowetting effect is more fully described in International Patent Application No. 3/7i346. When the oil and/or the water has specific optical properties for light absorption, reflection and/or transmission. The component 〇 can be operated as a light valve in, for example, a display. The electrowetting elements can be used in a display device in which a plurality of electrowetting elements I are mounted as display devices; Display drive system provides • for setting these The voltage in the desired state. Figure 7 shows an apparatus for depositing a layer on a surface in accordance with the present invention. A tray 82 can be filled with the second fluid. The tray includes a platform 84 on which a The substrate has one opening % on the lower side. The dispenser 85 is mounted on a translation platform (not shown) that enables the dispenser to sweep across the platform 84. Alternatively, the dispenser is stationary and the dispenser is stationary. 130008.doc -21- 201107047 The surface is worn on a translational platform. In operation, the dispenser opening is below the level of the second fluid. One of the first fluids 87 for the first fluid is connected to - A first control unit 88 (e.g., a pump or a pump) that controls the amount of first fluid to be delivered to the dispenser 85 via a connection 89. The second container 9 for the third fluid is similarly connected And a second control unit Μ for delivering the third fluid to the dispenser via a connection 92. When the first flow system is air, the second container can be dispensed and the control unit can be better The system is surrounded by a filter from the surroundings The air is extracted or any excess air is expelled. The connection 92 can also be used to vent air from the dispenser when it has to reduce the size of the droplets or when the air removed from the workmanship becomes quite large. The device 93 is configured to set the first and second controllers to the desired signal. The device may include one of determining thicknesses of the deposited layer: =, and the thickness value may be used to set the control Input to the unit. The 2 may also include, for example, measuring the shape and/or size of the third fluid droplet or using the camera in the long axis direction of the dispenser to view the dispenser and the surface a device for the first fluid volume, and using the input to set the control units. Above the surface (4) dispensing = south degrees may be measured, for example, by measuring two degrees at the distal end of the elongate dispenser And maintaining the heights at an equal value to maintain a desired value. This can be done using manual input from one of the devices rather than the weight value. Figure 8 shows an alternative embodiment of the method according to the invention. The permeate tube (8) is filled with [fluid 6 and in the second ejecting layer having a 130008.doc • 22· 201107047 opening one of the dispensers 100 is scanned on the surface 42 of the plate 43 in a direction 1〇2, thereby A layer 1 〇 3 of the first fluid is deposited on the surface. A dispenser 105, which is filled with a third fluid 9 through a tube 106 and has an opening in the second fluid layer 7, follows the dispenser 1 and scans the surface 42 in a direction ι7. The third fluid is in the dispenser! A droplet is formed between the opening of the crucible 5 and the surface 42. The droplet removes air voids trapped on the surface after the second fluid layer is provided on the surface. The above specific embodiments are to be understood as illustrative examples of the invention. It is to be understood that any of the features described with respect to any particular embodiment may be used alone or in combination with one or more of the other specific embodiments. The use of this document, or any combination of any of the specific embodiments, may also be used in the context of the invention as defined by the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows a device for dispensing oil on a surface using an air droplet according to the present invention; Figures 2 and 3 show the application of oil on a surface having a pattern One of the dispensers; Figure 4 shows one of the devices having an elongated dispenser; Figures 5(a), (b) and (c) show the first, second and third positions for scanning one of the surfaces. Figure 6 shows a section of an electrowetting element; Figure 7 shows a controller for the device; and 130008.doc -23- 201107047 Figure 8 shows one dispenser for dispensing oil and for applying air A separate dispenser. [Main component symbol description] 1 plate 2 area/surface 3 dispenser/injector needle 4 center channel/opening 6 first fluid

7 second fluid 8 opening 9 third fluid 10 droplet 11 interface 12 layer 13 leading interface 20 pattern 21 first region 22 second region 30 pattern 31 first region 32 second region 33 pin 34 opening 40 dispenser 130008.doc -24- 201107047

41 opening 42 surface 43 plate 44 tube 45 tube 46 droplet 47 oil layer 48 inner wall 49 wall portion 50 outer wall 52 leading interface 53 area pattern 54 boundary line 60 dispenser 61 pattern 62, 63 plate 64 pattern 70 first substrate 71 electrode / layer 72 Signal line 73 thin hydrophobic layer 74 hydrophilic layer / second hydrophilic region 75 first hydrophobic region 76 oil layer 130008.doc -25- 201107047

77 Water 78 Second substrate 79 Electrode 80 Signal line 82 Pallet 84 Platform 85 Dispenser 86 Opening 87 First container 88 First control unit 89 Connection 90 Second container 91 Second control unit 92 Connection 93 Controller 100 Dispenser 101 Tube 103 layer 105 dispenser 106 tube 130008.doc -26-

Claims (1)

201107047 X. Patent Application Range: 1. A method for providing a layer of a first fluid on a first region of a surface by a first dispenser having an opening, the method comprising the steps of providing on the surface a layer of a second fluid that is incompatible with the first fluid; disposing an opening of the first dispenser in the second fluid over the first region; and dispensing the opening through the opening A first fluid is used to kill on the first region; the dispensing is assisted by a third fluid that is incompatible with the first fluid. 2. The method of claim 1, wherein a second dispenser is provided having an opening configured in the second fluid for applying the third fluid. 3. The method of claim 2, comprising the step of applying the third fluid through the opening of the second dispenser to form a droplet of the second fluid between the opening and the surface. 4. The method of claim 2 or 3, wherein the first dispenser knows the surface prior to the second dispenser. 5. The method of claim 1, wherein the third flow system is applied through the opening of the first dispenser. 6. The method of claim 5, comprising the step of: dispensing the third fluid through the opening to form a droplet of the third fluid between the opening and the surface; and 130008.doc 201107047 through the opening Dispensing the first fluid for movement along an interface between the second fluid and the third fluid and depositing on the first region. 7. 7. The method of claim 1, wherein the first The zone has a lower wettability for the second fluid than for the first fluid. 8. The method of claim 1, wherein the first fluid and the second fluid system are in a liquid and the third stream is a gas. Ο 9. The method of claim 8, wherein the second flow system is polar or electrically conductive. 10. The method of claim 8, wherein the gas system is air. 11. The method of claim </ RTI> wherein the first region has an adjacent second region and the second region has a higher wettability for the second fluid than for the first fluid. The method of claim 11, wherein the surface comprises a plurality of first regions separated by a second region and formed into a pattern. The method of claim 12, wherein the pattern or a sub-pattern of the pattern has a decorative function or is used as a sign. 14. The method of claim 2, wherein the maximum size of the dispenser is less than a minimum dimension of one of the first regions. 15) The method of claim 2, wherein the maximum size of the dispenser is greater than a minimum dimension of one of the first regions. 16. The method of claim 2, wherein the applicator has an elongated shape. One of the ports has a port as claimed in claim 16 wherein the opening and the surface are moved relative to each other in a direction substantially perpendicular to the long axis of the elongated shape 130008.doc 201107047. 18. The method of claim 17, wherein the surface comprises a plurality of first regions separated by a second region and formed into a pattern, and the major axis of the elongated shape has a size that is at least the same as a pattern parallel to the major axis length. The method of claim 16, wherein the # line between a first region and a second region forms a local direction with a leading interface between the second fluid and the first fluid that crosses the boundary - Different from the angle of zero. ❹ 20. If printed! The method includes the step of scanning the first dispenser one or more times on the surface. 21. The method of claim 1, wherein the surface is part of a first substrate and the method comprises the steps of: providing a second substrate defining the first fluid between the first substrate and the second substrate a space with the second fluid. 22. The method of claim 21, wherein the first substrate and the second substrate form an electrowetting element. A device comprising: a first dispenser having an opening for using a method as claimed in any one of claims 1, 2, 3, 5 to 1, 3 or 17 to 22 A layer of a first fluid is provided on a first region of the surface. 24. The device of claim 23, comprising a second dispenser having an opening for applying a third fluid. 25. The first dispenser device has a first input for the first fluid and a second input for the third fluid, as disclosed in claim 23. 26. The device of claim 23, wherein the opening of the dispenser is elongated. 130008.doc 201107047 27. The device of claim 23, comprising a mobile platform and the surface moving relative to each other. 28. The device of claim 23, comprising a controller, a fluid and the third fluid. 29. The device of claim 23, comprising a controller at a height above the surface. For making the application for controlling the first for controlling the dispensing 130008.doc