Mask and fabrication method thereof

1. A mask, comprising:

a frame, which includes a hollow portion and a border surrounding the hollow portion;

an opening plate, which is provided on the frame and includes an opening and a body surrounding the opening, the opening corresponding to the hollow portion, and the body being connected with the border; and

a pattern plate, which is provided on the opening plate and includes a pattern portion and a non-pattern portion positioned in a periphery of the pattern portion, the pattern portion corresponding to the opening, and the non-pattern portion being connected with the body of the opening plate,

wherein the opening plate includes a plurality of opening strips, the opening is provided in each opening strip, each opening strip extends along a first direction, the plurality of opening strips are sequentially arranged along a second direction, and the second direction intersects with the first direction, and

wherein at a position of the border of the frame, the border of the frame, the body of the opening plate and the non-pattern portion of the pattern plate overlap one another in a direction perpendicular to the mask,

wherein at the position of the border of the frame, the body of the opening plate is between the border of the frame and the non-pattern portion of the pattern plate in the direction perpendicular to the mask so that the border of the frame is separated from the non-pattern portion of the pattern plate by the body of the opening plate,

wherein each opening strip includes a first thinned portion and a second thinned portion which are respectively positioned on two opposite sides of the opening strip, the first thinned portion and the second thinned portion are arranged along the second direction, the first thinned portion and the second thinned portion extend along the first direction, and adjacent thinned portions adjacent opening strips overlap each other,

wherein the pattern plate includes a plurality of pattern strips, each pattern strip, includes the pattern portion each pattern strip extends along the first direction, and the plurality of pattern strips are sequentially arranged along the second direction, and

wherein a width of each pattern strip is smaller than a width of the opening strip corresponding to the pattern strip in the second direction, and each pattern strip is provided between the first thinned portion and the second thinned portion of the opening, strip corresponding to the pattern strip in the second direction.

2. The mask according to claim 1 , wherein a surface of the frame, which faces the pattern plate, is flat at a position where the surface overlaps the pattern plate.

3. The mask according to claim 1 , wherein a portion of the pattern plate, which overlaps the border, is positioned in a region where the body of the opening plate is positioned.

4. The mask according to claim 1 , wherein a sum of thicknesses of the overlapped thinned portions is equal to a thickness of the opening strip.

5. The mask according to claim 1 , wherein a width of each opening strip is 50 to 130 mm.

6. The mask according to claim 1 , wherein a material for forming at least one of the opening plate and the pattern plate is an Invar alloy.

7. The mask according to claim 1 , wherein an orthogonal projection of the pattern portion of the pattern plate on the opening plate is positioned in the opening.

8. A fabrication method of a mask, comprising:

providing an opening plate on a frame, wherein the frame includes a hollow portion and a border surrounding the hollow portion, the opening plate includes an opening and a body surrounding the opening, the opening corresponds to the hollow portion, and the body is connected with the border; and

providing a pattern plate on the opening plate, wherein the pattern plate includes a pattern portion and a non-pattern portion positioned in a periphery of the pattern portion, the pattern portion corresponds to the opening, and the non-pattern portion is connected with the body of the opening plate,

wherein the opening plate includes a plurality of opening strips, the opening is provided in each opening strip, each opening strip extends along a first direction, the plurality of opening strips are sequentially arranged along a second direction, and the second direction intersects with the first direction,

wherein at a position of the border of the frame, the border of the frame, the body of the opening plate and the non-pattern portion of the pattern plate overlap one another in a direction perpendicular to the mask,

wherein at the position of the border of the frame, the body of the opening plate is between the border of the frame and the non-pattern portion of the pattern plate in the direction perpendicular to the mask so that the border of the frame is separated from the non-pattern portion of the pattern plate by the body of the opening plate,

wherein each opening strip includes a first thinned portion and a second thinned portion which are respectively positioned on two opposite sides of the opening strip, the first thinned portion and the second thinned portion are arranged along the second direction, the first thinned portion and the second thinned portion extend along the first direction, and adjacent thinned portions of adjacent opening strips overlap each other,

wherein the pattern plate includes a plurality of pattern strips, each pattern strip includes the pattern portion, each pattern strip extends along the first direction, and the plurality of pattern strips are sequentially arranged along the second direction, and

wherein a width of each pattern strip is smaller than a width of the opening strip corresponding to the pattern strip in the second direction and each pattern strip is provided between the first thinned portion and the second thinned portion of the opening corresponding to the pattern strip in the second direction.

9. The fabrication method according to claim 8 , wherein the opening and the body of the opening plate are formed by carrying out a patterning process on a metal layer.

10. The mask according to claim 1 , wherein an entirety of a surface of the frame, which faces the pattern plate, is flat.

11. The mask according to claim 1 , wherein the pattern portion of the pattern plate comprises an opening region.

12. The mask according to claim 1 , wherein the pattern portion of the pattern plate comprises a plurality of shield regions and a plurality of non-shield regions provided within the pattern portion, and the plurality of shield regions and the plurality of non-shield regions are provided alternatively.

13. The mask according to claim 1 , wherein the body of the opening plate is of an integral structure.

14. The mask according to claim 1 , wherein the frame includes only one hollow portion.

15. The mask according to claim 1 , wherein each pattern strip does not overlap the first thinned portion and the second thinned portion of the opening strip corresponding to the pattern strip in the direction perpendicular to the mask.