Mask carrier and evaporation system

A mask carrier and an evaporation system are provided. The mask carrier includes a base and at least two correction fixtures. The at least two correction fixtures are configured to clamp, on the base, a framework of a metal mask which is used for evaporation on the base, the base has a first opening through which organic material passes, and the at least two correction fixtures are around the first opening in a spaced manner. During organic evaporation coating, the at least two correction fixtures on the mask carrier press the framework of the metal mask to prevent the framework from deformation. Thus, a clearance between a substrate and the metal mask is reduced or even eliminated after the substrate is in press-fit with surface of the metal mask. Patterns obtained through evaporation are clear in shape and outline and normal in size. Hence, the product yield is increased.

This application claims priority to Chinese Patent Application No. 201710797457.3, filed with the State Intellectual Property Office on Sep. 6, 2017 and titled “MASK CARRIER AND EVAPORATION SYSTEM”, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to a mask carrier and an evaporation system.

BACKGROUND

The organic evaporation coating technology is an important preparation method of an organic film layer in an organic light emitting diode (OLED) When the organic evaporation coating technology is adopted to prepare the organic film layer, a high-precision metal mask is used as a mould. An organic material is heated to be volatilized at a high-temperature and then the volatilized organic material penetrates an opening of the mask in a molecular state to be evaporated on a substrate.

Particularly, the metal mask comprises a framework and a metal mask sheet provided with an opening and welded on the framework. During evaporation, the framework is disposed on a hollow carrier. The substrate to be evaporated is placed on the metal mask sheet in a fitting manner. A magnetic device is arranged on the side, facing away from the metal mask sheet, of the substrate to be evaporated. By the magnetic device, the metal mask sheet is attracted onto the substrate to be evaporated. The organic material is heated under the carrier to be volatilized at a high temperature, and then the volatilized organic material penetrates the carrier and the framework and is evaporated on the substrate through the opening.

SUMMARY

Embodiments of the present disclosure provide a mask carrier and an evaporation system.

At least one embodiment of the present disclosure provides a mask carrier, comprising a base and at least two correction fixtures disposed on the base, wherein the at least two correction fixtures are configured to clamp a framework of a metal mask on the base, the metal mask is placed on the base and is used for evaporation, a first opening that allows an organic material to pass is disposed on the base, and the at least two correction fixtures are disposed around the first opening in a spaced manner.

Optionally, each of the correction fixtures comprises a support rod, an L-shaped connecting rod and a press-fit plate for compressing the framework, one end of the support rod is mounted on the base, the other end of the support rod is connected to one end of the L-shaped connecting rod, and the press-fit plate is disposed at the other end of the L-shaped connecting rod.

Optionally, an accommodating cavity is formed in the base, a second opening that is communicated with the accommodating cavity is formed in a top surface of the base, the correction fixture has a first state and a second state, is disposed inside the accommodating cavity when in the first state and outside the accommodating cavity when in the second state, and is configured to clamp the framework on the base, and the second opening allows the correction fixture, which is switched from the first state to the second state, to pass.

Optionally, one end of the support rod is rotatably mounted in the accommodating cavity, the support rod may rotate between a first position and a second position around one end of its own, a length direction of the support rod is perpendicular to the top surface of the base when the support rod is in the second position, and the correction fixture is in the first state when the support rod is in the first position.

Optionally, the second opening comprises a long slot and an end portion hole connected to one end of the long slot, a length direction of the long slot is perpendicular to a rotating shaft around which one end of the support rod rotates, a projection of the support rod on the top surface of the base is situated in the long slot when the correction fixture is in the first state, and the end portion hole allows the L-shaped connecting rod and the press-fit plate to pass when the support rod rotates.

Optionally, the correction fixture further comprises a power unit configured to drive the support rod to rotate and connected to the support rod.

Optionally, the power unit comprises a motor that is disposed in the accommodating cavity, and an output shaft of the motor is coaxially connected to the rotating shaft of the support rod.

Optionally, the power unit comprises a telescopic cylinder and a mounting base, one end of the support rod is mounted on the mounting base, one end of the telescopic cylinder is rotatably connected to the bottom of the accommodating cavity, the other end of the telescopic cylinder is rotatably connected to the middle of the support rod, and the support rod is in the second position when the telescopic cylinder extends to a first length, and is in the first position when the telescopic cylinder retracts to a second length.

Optionally, the support rod is a telescopic rod.

Optionally, the telescopic rod is a hydraulic rod or an electric lifting screw.

Optionally, the mask carrier further comprises a control unit, wherein the control unit is configured to control the power unit to drive the support rod to rotate from the first position to the second position when receiving a first instruction, to control the support rod to retract when the support rod is in the second position, to control the support rod to extend when receiving a second instruction, and to control the power unit to drive the support rod to rotate from the second position to the first position after the support rod extends.

Optionally, a slideway is disposed in the accommodating cavity and extends from the lower portion of the second opening to the middle of the base, and the correction fixture is mounted on the slideway in a slideable manner.

Optionally, the support rod of the correction fixture is rotatably disposed on the base, the rotating shaft of the support rod is superimposed with an axis of the support rod, the support rod rotates to drive the press-fit plate to switch between a third position and a fourth position, the press-fit plate presses the framework when in the third position, and the projection of the support rod on the top surface of the base is situated between a projection of the press-fit plate on the top surface of the base and a projection of the framework on the top surface of the base when the press-fit plate is in the fourth position.

Optionally, the mask carrier comprises four correction fixtures that are respectively disposed at four edges or four vertexes of a rectangle, wherein the four vertexes of the rectangle correspond to four corners of the framework on the base.

At least one embodiment of the present disclosure provides an evaporation system, comprising an evaporation chamber, as well as a mask carrier and a metal mask that are disposed in the evaporation chamber, the metal mask is disposed on the mask carrier, and the mask carrier is any one of the mask carriers described in the first aspect.

DETAILED DESCRIPTION

The embodiments of the present disclosure will be described in further detail with reference to the enclosed drawings, to make the principles and advantages of the present disclosure clearer.

For convenience of the following description, firstly, application scenarios of a mask carrier provided by an embodiment of the present disclosure will be described below with reference toFIGS. 1-3.

FIG. 1is a structural schematic view of an evaporation system.FIG. 2is a structural top view of the evaporation system illustrated byFIG. 1. Referring toFIG. 1andFIG. 2, a mask carrier1is disposed in an evaporation chamber. A framework2is disposed on the mask carrier1. A metal mask sheet3(mould) is disposed on the framework2.

Here, the mask carrier1is columnar or platform-shaped. A first through hole10is formed in the middle of the mask carrier1and penetrates an upper surface and a lower surface of the mask carrier1. The framework2is of a stepped structure and comprises a first step with a first plane21and a second step with a second plane22. The second step is situated on the first step. The first plane21is a step surface of the stepped structure. The framework2may be secured to a top surface of the mask carrier1by means of bolted connection, etc. A second through hole20is formed in the middle of the framework2, penetrates an upper surface and a lower surface of the framework2and is connected with the first through hole10. The metal mask sheet3is secured at an opening of the second through hole20in a top surface of the framework2by means of welding. An opening30that corresponds to a pattern of an organic film layer to be evaporated is formed in the metal mask sheet3.

FIG. 3is a schematic view of an evaporation process of the evaporation system illustrated byFIG. 1andFIG. 2. Referring toFIG. 3, during evaporation, the side, onto which the organic film layer needs to be formed, is press-fit on the metal mask sheet3. A magnetic device (not shown inFIG. 3) is disposed on the side, facing away from the metal mask sheet3, of a substrate4to attract the metal mask sheet3onto the substrate4. A crucible5which contains an organic material50is disposed below the mask carrier1. The organic material50in the crucible is heated for high-temperature volatilization and then penetrates the first through hole10of the mask carrier1and a second through hole20of the framework2, and is evaporated on the substrate4via the opening30to form the organic film layer.

In the above-mentioned structure, as the metal mask sheet3is secured to the framework2by means of welding, the framework2may be deformed (e.g., edge warping) after the metal mask sheet3is welded on the framework, resulting in a deformation of the metal mask sheet3that is welded on the framework2, and causing a clearance between the substrate4and the metal mask sheet3. The metal mask sheet3situated in the middle of the framework2only has two ends welded on the framework2, and therefore, may be attracted and fit onto the substrate4under a magnetic action of the magnetic device. The metal mask sheets3situated on two sides of the framework2are wholly welded on the framework2, and therefore, may not be attracted onto the substrate4by a magnetic force of the magnetic device when the framework deforms. Thus, there is the relatively larger clearance between the metal mask sheets3situated on the two sides of the framework2and the substrate4. The organic material50will be diffused in the clearance between the substrate4and the metal mask sheets3when evaporated onto the substrate4from the opening30of the metal mask sheet3, resulting in larger and thinner patterns close to the two sides of the framework2than normal patterns, and at last, leading to an unfavorable color mixing of an OLED panel and decrease of the product yield.

Thus, an embodiment of the present disclosure provides a mask carrier with correction fixtures.

FIG. 4is a structural schematic view of a mask carrier provided by one embodiment of the present disclosure. Referring toFIG. 4, the mask carrier comprises a base100and at least two correction fixtures101disposed on the base100. The at least two correction fixtures101are configured to clamp a framework2of a metal mask that is placed on the base100on the base100. A first opening100A that allows an organic material to pass is formed in the base100. The at least two correction fixtures101are disposed around the first opening100A in a spaced manner.

The mask carrier provided by the embodiment of the present disclosure comprises the base100and the at least two correction fixtures101which are disposed on the base100in a spaced manner. The first opening that allows the organic material to pass is formed in the base100. During organic evaporation coating, the at least two correction fixtures on the mask carrier press the framework of the metal mask to prevent the framework from deformation. Thus, a clearance between the substrate and the metal mask is reduced or even eliminated after the substrate is in press-fit with a surface of the metal mask. Patterns obtained through evaporation are clear in shape and outline and normal in size. Hence, unfavorable color mixing is avoided. The product yield is increased.

In the embodiment, the metal mask is configured to perform evaporation of the organic film layer on the substrate, besides the framework2shown in the figure, further comprises a metal mask sheet that needs to be disposed on the framework2. The substrate is in press-fit with a surface of the metal mask sheet.

Here, the base100is of a columnar structure, including but not limited to a cylindrical structure, a prism structure, etc. The framework2is secured to the middle of the top surface of the base100and situated above the first opening100A. Here, the first opening100A is connected with the second through hole20of the framework2. A projection of the second through hole20on the top surface of the base100is situated in the first opening100A. Alternatively, the projection of the second through hole20on the top surface of the base100is superimposed with the first opening100A. That is, the first opening100A is larger than the second opening20. Alternatively, the first opening100A and the second opening20are the same in size. The first opening100A may be in the shape of regular graphics including a circle, a rectangle and the like, and may also be in the shape of an irregular graphic.

As shown inFIG. 4, each correction fixture101comprises a support rod111, an L-shaped connecting rod112and a press-fit plate113configured to compress the framework2. One end of the support rod111is mounted on the base100. The other end of the support rod111is connected to one end of the L-shaped connecting rod112. The press-fit plate113is disposed at the other end of the L-shaped connecting rod112and configured to provide a force for clamping the framework. The correction fixture101comprises the support rod111, the L-shaped connecting rod112and the press-fit plate113. One end of the support rod111is mounted on the base100thereby mounting and fixing of the correction fixture101are guaranteed. The press-fit plate113is disposed at the other end of the support rod111through the L-shaped connecting rod112. The framework is clamped by means of a press-fit plane of the press-fit plate110.

In the embodiment of the present disclosure, cross sections of the support rod111and the L-shaped connecting rod112may be circular, rectangular, etc. That is, the support rod111and the L-shaped connecting rod112may be round rods or square rods. The support rod111and the L-shaped connecting rod112may be metal rods, guaranteeing the strength of the whole fixture.

In the embodiment of the present disclosure, the function of the press-fit plate113is to compress the framework and may be cylindrical or prismatic to facilitate manufacture and use.

In the embodiment of the present disclosure, the L-shaped connecting rod112comprises a cross rod121and a vertical rod122connected to the cross rod121. The support rod111and the cross rod121and the vertical rod of the L-shaped connecting rod112may be connected in the following two modes. The first connection mode is that the support rod111and the L-shaped connecting rod112, as well as the cross rod121and the vertical rod122of the L-shaped connecting rod112, are in secured connection, e.g., threaded connection, or adopt an integrated design during manufacture. The second connection mode is that the support rod111and the L-shaped connecting rod112, as well as the cross rod121and the vertical rod122of the L-shaped connecting rod112, are in. For example, the rotatable connection is realized by means of hinging between the support rod111and the L-shaped connecting rod112, as well as between the cross rod121and the vertical rod122of the L-shaped connecting rod112.

To realize a compressing role of the press-fit plate113, the following two design solutions may be adopted. In one design solution, the press-fit plate113may compress the framework by virtue of its own gravity. At this time, the press-fit plate113is relatively heavier and may be made of a high-density material, e.g., a high-density metal (e.g., copper). In the other design solution, the press-fit plate113may compress the framework by virtue of external power. For example, the correction fixture101further comprises a pressure component which is configured to apply a force to the press-fit plate113when the press-fit plate113is above the framework so as to compress the framework. For example, as shown inFIG. 4, an elastic part (e.g., a spring)101A may be connected between the L-shaped connecting rod112and the base100. Before assembly of the framework2and the metal mask sheet3is finished, one end of the elastic part101A is secured to the L-shaped connecting rod112or the base100. The other end of the elastic part101A is released. After the assembly of the framework2and the metal mask sheet3is finished, the other end of the elastic part101A is also connected to the base100or the L-shaped connecting rod112. As the length of the elastic part101A in a natural state is smaller than the distance between connection points at two ends of the elastic part101A, the elastic part101A is elongated. Thus, an opposite (downward inFIG. 4) tensile force is applied to the press-fit plate113to compress the framework2. Exemplarily, a snap ring or a grab may be disposed on the base100or the L-shaped connecting rod112to facilitate connection with the other end of the elastic part101A.

FIG. 4is a structural schematic view of a correction fixture101during operation. For convenient use of the correction fixture101, the correction fixture101provided by the embodiment of the present disclosure may have two states, namely, an operating state and a non-operating state. Here, the non-operating state may adopt two designs which are shown respectively inFIGS. 5-11andFIGS. 12-13.

In an implementation of the embodiment of the present disclosure, the mask carrier provided by the embodiment of the present disclosure may adopt the structures as shown inFIGS. 5-7.

Referring toFIGS. 5-7, an accommodating cavity100B is formed in the base100. A second opening100C communicated with the accommodating cavity100B is formed in a top surface (the side with the framework2) of the base100. The correction fixture101has a first state (namely, the foregoing non-operating state) and a second state (namely, the foregoing operating state). The correction fixture101is disposed inside the accommodating cavity100B when in the first state. The correction fixture101is disposed outside the accommodating cavity100B when in the second state, and is configured to clamp the framework2on the base100. The second opening100C allows the correction fixture101, when it is switched from the first state into the second state, to pass. The correction fixture101which does not work is accommodated by the accommodating cavity100B of the base100, such that the correction fixture101is prevented from impacting such processes as assembly of the framework and the substrate before evaporation.

As shown inFIGS. 5-7, the accommodating cavity100B and the first opening100A are connected with each other to facilitate manufacture and machining of the base100.

As shown inFIGS. 5-7, one end of the support rod111is rotatably mounted in the accommodating cavity100B of the base100. The support rod111may rotate between a first position and a second position around one end of its own. The correction clamp101is in the second state when the support rod111is in the second position. At this time, a length direction of the support rod111is perpendicular to a top surface of the base100(as shown inFIGS. 6-7). The correction fixture101is in the first state and is situated in the accommodating cavity100B (as shown inFIG. 5) when the support rod111is in the first position. In a process of rotating the support rod111, the whole correction fixture101extends out of or retracts into the accommodating cavity100B via the second opening100C.

In the embodiment, to ensure that the whole correction fixture101may successfully pass through the second opening100C, the second opening100C comprises two portions, namely a long slot100D and an end portion hole100E that is connected to one end of the long slot100D. Here, a length direction of the long slot100D is perpendicular to a rotating shaft around which one end of the support rod111rotates. A projection of the support rod111on the top surface of the base100is situated in the long slot100D when the correction fixture101is in the first state. The end portion hole100E allows the L-shaped connecting rod112and the press-fit plate113to pass when the support rod111rotates. Here, the end portion hole100E may be circular, rectangular, etc.

In the embodiment of the present disclosure, the correction fixture101further comprises a power unit which drives the support rod111to rotate. The power unit is connected to the support rod111, and accordingly, drives the support rod111to rotate when the power unit works.

Referring toFIGS. 6-7, in this implementation, the power unit may comprise a motor114that is disposed in the accommodating cavity100B of the base100. An output shaft of the motor114is coaxially connected to the rotating shaft of the support rod111. When the motor114works, the output shaft of the motor114rotates to drive the support rod111to rotate between the first position and the second position. Thus, the whole correction fixture101moves.

To ensure that the power unit can provide sufficient power to support rotation of the support rod111, besides the motor114, the power unit may further comprise a reducer that is connected between the output shaft of the motor114and the rotating shaft of the support rod111(that is, an input shaft of the reducer is coaxially connected to the output shaft of the motor, and an output shaft of the reducer is coaxially connected to the rotating shaft of the support rod). The reducer is configured to reduce the rotational speed and to increase the torque, guaranteeing the power provided by the power unit for the support rod111.

Besides that the power unit illustrated inFIGS. 6-7is adopted to realize rotation of the support rod111, the embodiment of the present disclosure further comprises a format of the power unit as shown inFIGS. 8-9which illustrate sectional views of the base100. Referring toFIGS. 8-9, the power unit comprises a telescopic cylinder115and a mounting base116. One end of the support rod111is mounted on the mounting base116. The rotating shaft of the support rod111is secured to the mounting base116. One end of the telescopic cylinder115is rotatably connected to the bottom of the accommodating cavity100B in the base100. The other end of the telescopic cylinder115is rotatably connected to the middle of the support rod111. The support rod111is in the second position when the telescopic cylinder115extends to a first length, and is in the first position when the telescopic cylinder115retracts to a second length. The telescopic cylinder115is controlled to extend and retract to control the state of the whole correction fixture101. Here, the mounting base116is secured to the bottom of the accommodating cavity and is situated below the second opening100C.

Here, the telescopic cylinder includes but not limited to a hydraulic cylinder or a gas cylinder. When the telescopic cylinder is the hydraulic cylinder or the gas cylinder, the power unit further comprises a pump configured to pump a liquid or a gas into the hydraulic cylinder or the gas cylinder.

When the solution illustrated byFIGS. 5-7or the solution illustrated byFIGS. 8-9is adopted to receive the correction fixture101in the non-operating state in the accommodating cavity100B, besides that the support rod111needs to be controlled to rotate, it also needs to be guaranteed that the support rod111may not be blocked by the framework2in the rotating process. The press-fit plate113may smoothly compress tightly the framework2when the support rod111rotates to the second position. Thus, in a process of rotating from the first position to the second position, the length of the support rod111should be larger than that of the support rod111which reaches the second position.

For example, the support rod111provided by the embodiment of the present disclosure may be a telescopic rod. The support rod111is in an elongated state in the rotating process, and starts to be shortened when reaching the second position. Thus, the press-fit plate113is driven to press the framework2.

In this case, the press-fit plate113may compress the framework2through a contractive tensile force of the support rod111. To guarantee that the support rod111may compress the framework2during a contraction, the correction fixture101adopts the first connection solution. That is, the support rod111and the L-shaped connecting rod112, as well as the cross rod121and the vertical rod122of the L-shaped connecting rod112, are connected in secured connection mode.

Here, the telescopic rod may be a hydraulic rod, an electric lifting screw or the like, which will not be limited by the embodiment of the present disclosure. When the telescopic rod is the hydraulic rod, it is easy to know that the support rod further comprises a pump configured to pump a liquid into the hydraulic rod.

In the embodiment of the present disclosure, the mask carrier further comprises a control unit configured to control the power unit to work and also to control the length of the support rod111. The control unit controls the power unit and the support rod111to work so as to guarantee normal operation of the correction fixture101.

Alternatively, the control unit is configured to control the power unit to drive the support rod to rotate from the first position to the second position when receiving a first instruction, to control the support rod111to retract when the support rod is in the second position, to control the support rod111to extend when receiving a second instruction, and to control the power unit to drive the support rod to rotate from the second position to the first position after the support rod111extends. Here, the first instruction and the second instruction may be input by a worker. The first instruction is for instructing the correction fixture101to start to work. The second instruction is for instructing the correction fixture101to finish working.

Here, when the power unit or the support rod is a hydraulic cylinder or a hydraulic rod, during control, the control unit directly controls a pump that provides the liquid for the hydraulic cylinder or the hydraulic rod.

When the solution illustrated byFIGS. 5-7or the solution illustrated byFIGS. 8-9is adopted, the support rod111has the same second position but slightly different first positions. As shown inFIGS. 6-7, the support rod111is transversely (parallel to the top surface of the base100) disposed in the accommodating cavity100B of the base100when in the first position. As shown inFIGS. 8-9, referring toFIG. 8, the support rod111is obliquely disposed in the accommodating cavity100B of the base100.

Optionally, a slideway is disposed in the accommodating cavity100B of the base100. Referring toFIG. 10andFIG. 11, the slideway1140extends from the lower portion of the second opening100C to the middle of the base100. The correction fixture101is mounted on the slideway1140in a slideable manner, and may transversely move in the accommodating cavity100B by means of the slideway1140. That is, the correction fixture101moves in a plane that is parallel to the top surface of the base100, e.g., moves from the lower portion of the second opening100C to the middle of the accommodating cavity100B. Thus, the correction fixture101may be completely concealed in the non-operating state for protection.

FIG. 10andFIG. 11are structural views of a slideway on the basis of the structures shown byFIG. 6andFIG. 7. The support rod111, the L-shaped connecting rod112, the press-fit plate113and the motor114may move between two positions via the slideway1140.

Here, the slideway may comprise a slide rail, a slider and a driving motor. A rack is disposed on the slider. A gear is disposed on an output shaft of the driving motor and meshed with the rack. Further, the slider is driven to slide by the driving motor.

Besides, when receiving the first instruction, the control unit is configured to control the driving motor to transport the power unit and the support rod to be below the second opening, and then executes follow-up control actions. Similarly, when the correction fixture retracts into the accommodating cavity after use, the driving motor is controlled to transport the power unit and the support rod to be away from the lower portion of the second opening.

In another example of the embodiment of the present disclosure, the mask carrier provided by the embodiment of the present disclosure may adopt the structures as shown inFIG. 12andFIG. 13. Referring toFIG. 12andFIG. 13, the support rod111of the correction fixture101is rotatably disposed on the base100. The rotating shaft of the support rod111is superimposed with an axis of the support rod111. The support rod111drives the press-fit plate113to switch between a third position and a fourth position during rotation. A press-fit plane of the press-fit plate113presses the framework when the press-fit plate113is in the third position (as shown inFIG. 13). The projection of the support rod111on the top surface of the base100is situated between a projection of the press-fit plate113on the top surface of the base100and a projection of the framework2on the top surface of the base100when the press-fit plate113is in the fourth position (as shown inFIG. 12). When the correction fixture101starts to work, the support rod111rotates to ensure that the press-fit plate113rotates from the third position to the fourth position. When the correction fixture101finishes working, the support rod111rotates to ensure that the press-fit plate113rotates from the fourth position to the third position. The support rod111rotates to adjust the position of the press-fit plate113, such that the press-fit plate113may play a correcting role during evaporation and may not impact assembly of the framework, the substrate, etc. when not working.

As shown inFIG. 12andFIG. 13, in this example, the lower end of the support rod111penetrates the top surface of the base100to be connected to a power mechanism117disposed in the base100. The power mechanism117rotates to drive the support rod111to rotate. Exemplarily, the through hole100D is formed in the top surface of the base100. The lower end of the support rod111penetrates the through hole100D formed in the base100. Here, the power mechanism117may be a motor and may be controlled by the control unit. Referring to the description of the control unit in the another foregoing example for the example of the control unit, which will not be limited herein.

Here, the through hole100D may be a circular hole or other through holes in regular or irregular shapes.

In this example, the power mechanism117may not only be disposed in the base100but also be directly disposed on the top surface of the base100. In contrast, the space may be saved by disposing the power mechanism117in the base.

In this example, the correction fixture101may adopt the foregoing first connection mode or the foregoing second connection mode.

In the embodiment of the present disclosure, the mask carrier comprises four correction fixtures101which are respectively disposed at the four edges or the four vortexes of a rectangle. The four vortexes of the rectangle correspond to four corners of the framework2disposed on the base100. Here, that the four vortexes of the rectangle correspond to the four corners of the framework2disposed on the base100means that the four edges of the rectangle are respectively parallel to the four edges of a rectangle formed by the four corners of the framework2. As the four fixtures are disposed, the framework is press-fit in all directions, guaranteeing a press-fit effect and the quality of evaporated patterns.

Exemplarily, refer to the structure illustrated byFIG. 5for that the four correction fixtures101are respectively disposed at the four edges of the rectangle, and refer to the structure illustrated byFIG. 14for that the four correction fixtures101are respectively disposed at the four vortexes of the rectangle. Here,FIG. 14is a structural schematic view of a base provided by an embodiment of the present disclosure. As shown inFIG. 14, the base100may be a cuboid. When the mask carrier includes the four correction fixtures101, the through holes100D in the base may be formed in four corners of a top surface of the cuboid as shown in the figure. The four vortexes of the rectangle formed by the four through holes100D correspond to four corners of the framework2on the base100.

An embodiment of the present disclosure further provides an evaporation system, comprising an evaporation chamber, as well as a mask carrier and a metal mask that are disposed in the evaporation chamber, wherein the metal mask is disposed on the mask carrier, the mask carrier is the mask carrier shown in any one ofFIG. 4toFIG. 14.

The mask carrier provided by the embodiment of the present disclosure comprises a base and at least two correction fixtures which are disposed on the base in a spaced manner. A first opening which allows the organic material to pass is formed in the base. During organic evaporation coating, the at least two correction fixtures on the mask carrier press the framework of the metal mask to prevent the framework from deformation. Thus, a clearance between a substrate and the metal mask is reduced or even eliminated after the substrate is in press-fit with a surface of the metal mask. Patterns obtained through evaporation are clear in shape and outline and normal in size. Hence, unfavorable color mixing is avoided. The product yield is increased.

The foregoing descriptions are only exemplary embodiments of the present disclosure, and are not intended to limit the present disclosure. Within the spirit and principles of the disclosure, any modifications, equivalent substitutions, improvements, etc., are within the scope of protection of the appending claims of the present disclosure.