| 摘要 |
PURPOSE: A screen mask for manufacturing improved phosphor screen is provided to achieve an improved yield rate, lengthen lifespan of screen mask and enhance quality of the phosphor screen. CONSTITUTION: A screen mask comprises a frame for fixing a mesh(2), wherein the frame is formed into a double structure including a first frame(1) and a second frame(1-2). One of the first frame or the second frame has the mesh attached to the frame, and is movable so as to adjust size of the mesh. The other of the first frame or the second frame supports the frame where the mesh is attached. One of the first frame or the second frame is an integrated type and the other is a split type. The split type frame has a plurality of connection rings(4) and is fixed to the integrate type frame. The size of the mesh and the size of an effective screen(3) are adjusted by controlling the split type frame through the connecting rings.
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