The application claims priority to the Chinese patent application No. 201710289649.3, filed on Apr. 27, 2017, the entire disclosure of which is incorporated herein by reference as part of the present application.
Embodiments of the present disclosure relate to a mask sheet, a mask plate, and an assembling method thereof.
With the continuous development of display technologies, conventional displays include liquid crystal displays (LCDs), organic light emitting diodes (OLEDs), plasma display panels (PDPs), and electronic ink displays etc. Organic electroluminescent displays are increasingly welcomed by the market due to their advantages of low power consumption, light weight and thin thickness, high color gamut, high display brightness, wide viewing angle, and fast response speed.
The fine metal mask (FMM) is assembled by welding a frame, a cover, a support bar (howling), and a fine metal mask sheet (FMM Sheet) together. A fine metal mask sheet is a mask sheet that allows a deposition material or an evaporation material to be deposited or evaporated on a substrate and to form a fine pattern. In general, an FMM sheet includes a plurality of openings, such as a plurality of square slits or a plurality of stripe-shaped slits, allowing a deposition material to pass through, so as to deposit or evaporate the deposition or evaporation material onto a substrate to form a fine pattern.
At least one embodiment of the present disclosure provides a mask sheet, a mask plate, and an assembling method thereof. The mask sheet is a new type of mask sheet, so that the mask plate using the mask sheet does not need to be provided with a cover, thereby reducing tact time of welding of an entire of the mask plate, and improving assembling efficiency of the mask plate.
At least one embodiment of the present disclosure provides a mask sheet, including: a mask region; and a peripheral region surrounding the mask region, wherein, at least one edge portion of the mask sheet located in the peripheral region includes a thickness reduced portion.
For example, in the mask sheet provided by an embodiment of the present disclosure, the mask sheet has an extension direction, and the at least one edge portion includes a first edge portion and a second edge portion which extend along the extension direction, the first edge portion and the second edge portion include the thickness reduced portion, respectively.
For example, in the mask sheet provided by an embodiment of the present disclosure, the thickness reduced portion includes an upper thickness reduced portion or a lower thickness reduced portion, and the upper thickness reduced portion is obtained by removing a part of the mask sheet in thickness from an upper surface of the mask sheet, and the lower thickness reduced portion is obtained by removing a part of the mask sheet in thickness from a lower surface of the mask sheet.
For example, in the mask sheet provided by an embodiment of the present disclosure, a cross-section of the thickness reduced portion includes a step shape or a trapezoidal shape.
For example, in the mask sheet provided by an embodiment of the present disclosure, the thickness reduced portion includes an intermediate thinned portion or a two-side thinned portion, and the intermediate thinned portion is obtained by removing a part of the mask sheet in thickness between an upper surface and a lower surface of the mask sheet, the two-side thinned portion is obtained by simultaneously removing a part of the thickness of the mask sheet in thickness from an upper surface and a lower surface of the mask sheet.
At least one embodiment of the present disclosure provides mask plate, including: a first mask sheet, including a first mask region and a first peripheral region surrounding the first mask region, at least one edge portion of the first mask sheet in the first peripheral region including an upper thickness reduced portion; and a second mask sheet, including a second mask region and a second peripheral region surrounding the second mask region, at least one edge portion of the second mask sheet in the second peripheral region including a lower thickness reduced portion; wherein, the first mask sheet and the second mask sheet are alternately disposed, and the upper thickness reduced portion and the lower thickness reduced portion of adjacent first mask sheet and second mask sheet are at least partially overlapped with each other.
For example, in the mask plate provided by an embodiment of the present disclosure, the first mask sheet has a first extension direction, and the first mask sheet includes a first edge portion and a second edge portion which are located in the first peripheral region and extend along the first extension direction, the first edge portion and the second edge portion each include the upper thickness reduced portion; the second mask sheet has a second extension direction, and the second mask sheet includes a third edge portion and a fourth edge portion which are located in the second peripheral region and extend along the second extension direction, the third edge portion and the fourth edge portion each include the lower thickness reduced portion.
For example, in the mask plate provided by an embodiment of the present disclosure, a thickness of the first peripheral region and a thickness of the second peripheral region are substantially the same, an overall thickness of the upper thickness reduced portion and the lower thickness reduced portion which are overlapped with each other is substantially the same as the thickness of the first peripheral region and/or the second peripheral region.
For example, in the mask plate provided by an embodiment of the present disclosure, a cross-section of the upper thickness reduced portion and the lower thickness reduced portion includes a step shape or a trapezoidal shape.
For example, in the mask plate provided by an embodiment of the present disclosure, the mask plate further includes: a frame, including an opening; and a plurality of support bars, both ends of each of the plurality of support bars being fixed on the frame; wherein, the first mask sheet and the second mask sheet are alternately arranged on the plurality of support bars and fixedly arranged on the frame to completely cover the opening.
For example, in the mask plate provided by an embodiment of the present disclosure, an orthographic projection of the plurality of support bars on the first mask sheet falls into the first peripheral region of the first mask sheet, an orthographic projection of the plurality of support bars on the second mask sheet falls into the second peripheral region of the second mask sheet.
For example, in the mask plate provided by an embodiment of the present disclosure, the frame includes a support bar mounting surface, and both ends of each of the plurality of the support bars are fixedly disposed on the support bar mounting surface.
For example, in the mask plate provided by an embodiment of the present disclosure, the first extension direction and the second extension direction are substantially perpendicular to a third extension direction of the plurality of support bars.
For example, in the mask plate provided by an embodiment of the present disclosure, the mask plate is not provided with a cover extending along the first extension direction and between adjacent first mask sheet and the second mask sheet.
At least one embodiment of the present disclosure provides an assembling method of a mask plate, the mask plate including: a first mask sheet, including a first mask region and a first peripheral region surrounding the first mask region, at least one edge portion of the first mask sheet in the first peripheral region including an upper thickness reduced portion; and a second mask sheet, including a second mask region and a second peripheral region surrounding the second mask region, at least one edge portion of the second mask sheet in the second peripheral region including a lower thickness reduced portion; and the assembling method includes: mounting the first mask sheet at intervals; and mounting the second mask sheet beside the first mask sheet, and the lower thickness reduced portion of the second mask sheet at least partially covers the upper thickness reduced portion of the first mask sheet.
For example, in the assembling method of the mask plate provided by an embodiment of the present disclosure, the mask plate further including a frame and a plurality of support bars, the frame including an opening, and the assembling method further including: fixedly mounting both ends of each of the support bars on the frame; and alternately mounting the first mask sheet and the second mask sheet on the support bar, and fixing the first mask sheet and the second mask sheet on the frame to completely cover the opening.
For example, in the assembling method of the mask plate provided by an embodiment of the present disclosure, the frame further including a support bar mounting surface, and the assembling method further including: according to a position of the first mask region of the first mask sheet and a position of the second mask region of the second mask sheet, mounting the plurality of support bars so that an orthographic projection of the plurality of support bars on the first mask sheet falls into the first peripheral region, and an orthographic projection of the plurality of support bars on the second mask sheet falls into the second peripheral region.
For example, in the assembling method of the mask plate provided by an embodiment of the present disclosure, mounting the first mask sheet at intervals including: mounting the first mask sheet sequentially from a middle of the frame to two sides of the frame.
In order to clearly illustrate the technical solution of the embodiments of the disclosure, the drawings of the embodiments will be briefly described in the following; it is obvious that the described drawings are only related to some embodiments of the disclosure and thus are not limitative of the disclosure.
In order to make objects, technical details and advantages of the embodiments of the disclosure apparent, the technical solutions of the embodiments will be described in a clearly and fully understandable way in connection with the drawings related to the embodiments of the disclosure. Apparently, the described embodiments are just a part but not all of the embodiments of the disclosure. Based on the described embodiments herein, those skilled in the art can obtain other embodiment(s), without any inventive work, which should be within the scope of the disclosure.
Unless otherwise defined, all the technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. The terms “first,” “second,” etc., which are used in the disclosure, are not intended to indicate any sequence, amount or importance, but distinguish various components. Also, the terms “comprise,” “comprising,” “include,” “including,” etc., are intended to specify that the elements or the objects stated before these terms encompass the elements or the objects and equivalents thereof listed after these terms, but do not preclude the other elements or objects. The phrases “connect”, “connected”, etc., are not intended to limit to a physical connection or mechanical connection, but may include an electrical connection, directly or indirectly.
The embodiments of the present disclosure provide a mask sheet, a mask plate, and an assembling method thereof. The mask sheet includes at least one mask region and a peripheral region surrounding the mask region; at least one edge portion of the mask sheet in the peripheral region includes a thickness reduced portion. Thus, the mask sheet provides a new type of mask sheet, so that the mask plate using the mask sheet does not need to be provided with a cover, thereby reducing tact time of welding an entire of the mask sheet, and improving assembling efficiency of the mask plate. In addition, in the mask plate using the mask sheet, the degree of direct attachment of adjacent mask sheets is relatively high, and the accuracy of the product can be improved.
Hereinafter, the mask sheet, the mask plate and the assembling thereof provided in an embodiment of the present disclosure will be described with reference to the accompanying drawings.
An embodiment of the present disclosure provides a mask sheet.
In the mask sheet provided in the present embodiment, at least one edge portion of the mask sheet located in the peripheral region includes a thickness reduced portion. Thus, in the mask plate using the mask sheet, the thickness reduced portions of adjacent mask sheets can be at least partially overlapped with each other, so that the overlapped thickness reduced portions can function as a cover, i.e., to prevent a deposition or evaporation material from being deposited or evaporated in a region between adjacent mask sheets. Therefore, the mask plate using the mask sheet can be not provided with a cover, on the one hand, cost of the mask plate can be reduced, on the other hand, overall welding tact time of the mask plate can be reduced, and assembling efficiency of the mask plate can be improved. In addition, because the mask plate using the mask sheet can be not provided with a cover, a distance between the mask sheet and the substrate to be deposited or evaporated can be set small, that is, a degree of attachment of the mask sheet and the substrate to be deposited or evaporated can be set high, so that accuracy of the pattern deposited or evaporated onto the substrate to be deposited or evaporated can be improved.
For example, in the mask sheet provided in an example of the present embodiment, as illustrated in
For example,
For example, in some examples, the thickness reduced portion can adopt other structures. For example,
For example,
For example, as illustrated in
For example,
It should be noted that, the above-mentioned thickness reduced portions of the first edge portion and the second edge portion of the mask sheet illustrated in
For example,
For example,
It should be noted that, the shape of the cross-section of the thickness reduced portion provided by the embodiments of the disclosure includes but is not limited to the above-mentioned shapes illustrated in
An embodiment of the present disclosure further provides a mask plate.
In the mask plate provided in the present embodiment, at least one edge portion of the first mask sheet in the first peripheral region includes an upper thickness reduced portion, at least one edge portion of the second mask sheet in the second peripheral region includes a lower thickness reduced portion, and the upper thickness reduced portion and the lower thickness reduced portion which belong to adjacent first mask sheet and second mask sheet respectively are at least partially overlapped with each other. Thus, where the upper thickness reduced portion and the lower thickness reduced portion are at least partially overlapped of the adjacent first and second mask sheets can serve as a cover, i.e., to prevent a deposition or evaporation material from being deposited or evaporated in a region (gap) between adjacent first and second mask sheets. Therefore, the mask plate can be not provided with a cover. On the one hand, cost of the mask plate can be reduced. On the other hand, overall welding tact time of the mask plate can be reduced, and assembling efficiency of the mask plate can be improved. In addition, because the mask plate is not provided with a cover, a distance between the first/second mask sheets and the substrate to be deposited or evaporated can be set small, that is to say, a degree of attachment of the first/second mask sheets and the substrate to be deposited or evaporated can be set higher, thereby improving accuracy of a pattern deposited or evaporated on the substrate to be deposited or evaporated.
For example, in the mask plate provided by an example of the present embodiment, as illustrated in
It should be noted that, a case that the upper thickness reduced portion and the lower thickness reduced portion of adjacent first mask sheet and second mask sheet are at least partially overlapped includes a case that the upper thickness reduced portion and the lower thickness reduced portion are completely overlapped, and also includes a case that the upper thickness reduced portion and the lower thickness reduced portion are not completely overlapped, as long as the overlapped upper and lower thickness reduced portions can play a role of preventing a deposition or evaporation material from being deposited or evaporated in the region (gap) between adjacent first mask sheet and second mask sheet. For example, as illustrated in
For example, in the mask plate provided in an example of the present embodiment, as illustrated in
For example, in the mask plate provided by an example of the present embodiment, a thickness of the first peripheral region of the first mask sheet and a thickness of the second peripheral region of the second mask sheet are substantially the same, and an overall thickness of the upper thickness reduced portion of the first mask sheet and the lower thickness reduced portion of the second mask sheet is substantially the same as a thickness of the first peripheral region or the second peripheral region. Thus, flatness of the first mask sheets and the second mask sheets alternately disposed in the mask plate is high, so that accuracy of a pattern deposited or evaporated on the substrate to be deposited or evaporated can be further improved. It should be noted that, the above-mentioned “thicknesses are substantially the same” refers to that the thicknesses of the two are within 5%.
For example, in the mask plate provided in an example of the present embodiment, the cross-section of the upper and lower thickness reduced portions include a step shape or a trapezoidal shape. For details, reference can be made to the related description in the first embodiment, which will not be repeated herein in the present embodiment.
For example, in the mask plate provided in an example of the present embodiment, as illustrated in
For example, in the mask plate provided in an example of the present embodiment, as illustrated in
For example, in the mask plate provided in an example of the present embodiment, the frame 500 includes a support bar mounting surface 540. Two ends of each of the support bars 400 are fixed on the support bar mounting surface 540. Thus, grooves are not provided on the frame for each support bar, and thus, the support bars can be set according to the size and parameters (for example, a position and the number of mask patterns on the mask sheet) of the mask sheet. A frame can be used for assembling of multiple mask plates to increase utilization of the frame.
In the mask plate provided in the present embodiment, a cover along the first extension direction and between adjacent first mask sheet and second mask sheet can be not provided (omitted). Thus, on the one hand, cost of the mask plate can be reduced, and on the other hand, overall welding tact time of the mask plate can be reduced, and assembling efficiency of the mask plate can be improved. In addition, because the mask plate is not provided with a cover, a distance between the first mask sheet and the second mask sheet and the substrate to be deposited or evaporated can be set small, that is to say, a degree of attachment of the first/second mask sheets and the substrate to be deposited or evaporated can be set higher, so that accuracy of a pattern deposited or evaporated on the substrate to be deposited or evaporated can be improved.
An embodiment of the present disclosure further provides an assembling method of a mask plate, the mask plate including: a first mask sheet and a second mask sheet, the first mask sheet including a first mask region and a first peripheral region surrounding the first mask region, at least one edge portion of the first mask sheet in the first peripheral region including an upper thickness reduced portion; and the second mask sheet including a second mask region and a second peripheral region surrounding the second mask region, at least one edge portion of the second mask sheet in the second peripheral region including a lower thickness reduced portion; as illustrated in
Step S301: mounting the first mask sheets at intervals; and
Step S302: mounting the second mask sheet beside the first mask sheet, and the lower thickness reduced portion of the second mask sheet at least partially covers the upper thickness reduced portion of the first mask sheet.
Thus, the upper and lower thickness reduced portions of adjacent first and second mask sheets are at least partially overlapped. Therefore, the mask plate can be not provided with a cover. On the one hand, cost of the mask plate can be reduced. On the other hand, overall welding tact time of the mask plate can be reduced, and assembling efficiency of the mask plate can be improved. In addition, because the mask plate is not provided with a cover, a distance between the first/second mask sheets and the substrate to be deposited or evaporated can be set small. That is to say, a degree of attachment of the first mask sheet and the second mask sheet and the substrate to be deposited or evaporated can be set high, so that accuracy of a pattern deposited or evaporated on the substrate to be deposited or evaporated can be improved. In addition, because the first mask sheet having the upper thickness reduced portion is provided first, and then the second mask sheet having the lower thickness reduced portion is mounted, the assembling difficulty of the mask plate can be reduced.
For example, in the assembling method of the mask plate provided in an example of the present embodiment, the mask plate further includes a frame and a plurality of support bars, the frame includes an opening, and the assembling method can further include: fixedly mounting two ends of the support bars on the frame; and alternately mounting the first mask sheet and the second mask sheet on the support bar and fixing the first mask sheet and the second mask sheet on the frame to completely cover the opening.
For example, in the assembling method of the mask plate provided in an example of the present embodiment, the frame includes a support bar mounting surface. The assembling method includes: according to a position of the first mask region of the first mask sheet and a position of the second mask region of the second mask sheet, mounting the plurality of support bars so that an orthographic projection of the plurality of support bars on the first mask sheet falls into the first peripheral region of the first mask sheet, and an orthographic projection of the plurality of support bars on the second mask sheet falls into the second peripheral region of the second mask sheet. Thus, on the one hand, the plurality of support bars plays a role of supporting the first mask sheet and the second mask sheet, and does not block the first mask pattern of the first mask sheet and the second mask pattern of the second mask sheet. In addition, the support bars can be set according to the size and parameters (e.g., a position and the number of mask patterns of the mask sheet) of the mask sheet. A frame can be used for assembling of multiple mask plates to increase utilization of the frame.
For example, in the assembling method of the mask plate provided in an example of the present embodiment, mounting the first mask sheets at intervals includes: mounting, such as welding, the first mask sheet at intervals sequentially from a middle of the frame to two sides of the frame.
The following statements should be noted:
(1) The accompanying drawings involve only the structure(s) in connection with the embodiment(s) of the present disclosure, and other structure(s) can be referred to common design(s).
(2) In case of no conflict, features in one embodiment or in different embodiments can be combined.
What have been described above are only specific implementations of the present disclosure, the protection scope of the present disclosure is not limited thereto. Any changes or substitutions easily occur to those skilled in the art within the technical scope of the present disclosure should be covered in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.
Number | Date | Country | Kind |
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201710289649.3 | Apr 2017 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2017/112910 | 11/24/2017 | WO | 00 |