Light-emitting device substrate, light-emitting device, and method for producing light-emitting device substrate

A method for producing a light-emitting device including a plurality of light-emitting elements and a light-emitting device substrate including a base that includes aluminum, the method comprising:

• (a) forming, as an integral portion of one side of the base, a light reflecting surface that is exposed to an outside atmosphere by subjecting the one side of the base to anodic oxidation, the light reflecting surface being an anodized aluminum coating;
• (b) forming a first insulating layer on the one side of the base in a region other than the light reflecting surface;
• (c) forming an electrode pattern on the first insulating layer;
• and
• (d) forming a second insulating layer at least on the other side of the base that is opposite the one side of the base, wherein
• the step (a) is performed after the step (b),
• the plurality of light-emitting elements are on the anodized aluminum coating of the light-emitting device substrate,
• a spacing between adjacent ones of the plurality of light-emitting elements is at least two times a thickness of the second insulating layer,
• a thickness of the base is 10 mm or less and at least one-half the spacing,
• the step (c) includes the sub-steps of:
• (h) forming a conductive layer on the first insulating layer;
• and
• (i) forming an electrode pattern on the conductive layer, and
• the step (a) is performed between the sub-step (h) and the sub-step (i).