| 摘要 |
PROBLEM TO BE SOLVED: To provide a metal substrate.SOLUTION: There is provided a metal substrate which comprises: a first insulating base material having a first modified surface and a second surface opposite to the first modified surface; a second insulating base material bonded to the first modified surface so that the first insulating base material is located between the second insulating base material and a first metal layer; the first metal layer facing the second surface; and a second metal layer which is located on one side of the second insulating base material so that the second insulating base material is located between the first modified surface and the second metal layer. When the first modified surface is separated from the second insulating base material, the change amount of the initial surface roughness of the first modified surface is substantially smaller than 10%.SELECTED DRAWING: Figure 1D |
