A machining process and a rework process for a mask plate for vapor deposition
A processing technology and mask technology, which is applied in vacuum evaporation coating, metal material coating technology, sputtering coating and other directions, can solve the problems of large upper and lower openings and small middle openings, so as to improve the film forming rate and reduce scrap. The effect of improving the accuracy of opening size and production pass rate
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[0050] Example 1
[0051] The main innovation of the present invention is that the present invention innovatively proposes a processing technology of a mask plate for vapor deposition, please refer to Figure 8 , the processing technology of the present invention comprises the steps:
[0052] Step S1: see figure 1 , image 3 , the etching starts, part of the surface of the metal mask 2 is protected by the patterns (exposure dry film) 1 and 3, and the rest of the surface of the metal mask 2 is in contact with the etching solution. At this time, the etching is carried out vertically to the depth (direction of arrow 4).
[0053] In this embodiment, the material of the mask can be Invar; the thickness of the mask is 30-150 μm.
[0054] Step S2: See figure 2 , when the upper surface of the metal mask plate 2 is etched to a certain depth, new metal mask plate surfaces appear on the exposed sides. At this time, the etching solution is not only in the vertical direction (the d...
Example Embodiment
[0070] Embodiment 2
[0071] The invention provides a repairing process for a mask plate for evaporation, which adopts sandblasting micro-treatment to repair the mask plate with unqualified openings. see Image 6 , Figure 7 , sandblasting the protrusion 10 at the opening, such as Image 6 In the direction indicated by the middle arrow 8, a new opening 9 is formed; the difference between the upper and lower dimensions of the opening and the middle dimension shall meet the set requirements.
[0072] After the sandblasting micro-treatment, the opening of the mask is checked for a second time to judge whether it is qualified or not; if the difference between the upper and lower dimensions of the opening and the middle dimension is still greater than the set value, continue sandblasting without treatment until the opening size deviation is controlled within ±20μm .
[0073] In one embodiment of the present invention, the sandblasting micro-treatment process sequentially incl...
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