| 主权项 |
1. A metal substrate, comprising:
a first insulating substrate having a first modified surface and a second surface opposite to the first modified surface; a first metal layer facing the second surface; a second insulating substrate bonding on the first modified surface, such that the first insulating substrate is between the second insulating substrate and the first metal layer; and a second metal layer disposed on a side of the second insulating substrate, such that the second insulating substrate is between the first modified surface and the second metal layer, wherein each of the first insulating substrate and the second insulating substrate is made of a material selected from the group consisting of polyimide (PI), polyethylene terephthalate (PET), Teflon, liquid crystal polymer (LCP), polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), Nylon (polyamide), acrylic resin, acrylonitrile-butadiene-styrene (ABS), phenolic resin, epoxy resin, polyester, silicone, polyurethane (PU), polyamide-imide (PAI) and a combination thereof, and the first modified surface has an original surface roughness, and the original surface roughness has a variation substantially less than 10% after the first modified surface is released from the second insulating substrate. |
