It also has same two layers of copper conductor like Double layers MCPCB, but the metal core is in the middle of two conductor, so there're conductors (trace) on both sides of metal core, and were connected to each other by Vias. So we named it "Double sided MCPCB", and you can populated SMD on both top and bottom.

Base material: Aluminum/Copper/Iron Alloy
Thermal Conductivity (dielectrial layer): 0.8, 1.5, 2.0, 3.0 W/m.K.
Board Thickness: 0.5mm~3.0mm(0.02"~0.12")
Copper thickness: 0.5 OZ, 1.0 OZ, 2.0 OZ, 3.0 OZ, 4.0 OZ, 5.0 OZ
Outline: Routing, punching, V-Cut
Soldermask: White/Black/Blue/Green/Red Oil
Legend/Silkscreen Color: Black/White
Surface finishing: Immersion Gold, HASL, OSP
Max Panel size: 600*500mm(23.62"*19.68")
Packing: Vacuum/Plastic bag
Samples L/T: 10~15 Days
MP L/T: 12~15 Days