The invention provides a packaging substrate of an embedded passive
assembly. The packaging structure comprises a core board, a
dielectric layer unit, a positioning pad, a passive
assembly, a first line layer and a second line layer. The core board is provided with an opening, and the
dielectric layer unit wraps the core board, full-fills the opening of the core board, and is provided with an upper surface and a lower surface. The positioning pad is embedded in the lower surface of the
dielectric layer unit. The upper surface and lower surface of the passive
assembly are provided with a plurality of
electrode pads, and the passive assembly is embedded in the
dielectric layer unit, arranged in the opening of the core board, and corresponds to the positioning pad. The first line layer is arranged on the upper surface of the
dielectric layer unit, and a first conducting
blind hole is electrically connected between the first line layer and the
electrode pads arranged on the upper surface of the passive assembly. The second line layer is arranged on the lower surface of the
dielectric layer unit, and a second conducting
blind hole is electrically connected between the second line layer and the
electrode pads arranged on the lower surface of the passive assembly. The passive assembly is embedded in the core board and the dielectric layer unit, thereby effectively lowering the height of the overall structure.