| 摘要 |
PROBLEM TO BE SOLVED: To provide such a substrate having projection members that the fine projection members with high dimensional precision can be easily formed on the substrate surface, where a conductor layer is formed, without damaging the conductor layer. SOLUTION: In an image forming device (FED) 1 comprising a back plate 2, multiple electron emission elements 3 formed on the surface of the back plate 2, the projection members (spacers) 4 formed on the surface of the back plate 2 where the electron emission elements 3 are formed, and a front plate 5 formed in parallel with the back plate 2 with a predetermined distance kept from the back plate 2 by means of the projection members 4, the projection members 4 are provided on the surface of the back plate 2 and constituted of a joined body of a first projection member 4a higher than that of the conductor layer 6 of the electron emission elements 3 and a second projection member 4b formed integrally on the upper surface of the first projection member 4a, and the joint surface between the first projection member 4a and the second projection member 4b is a curved surface.
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