A method of manufacturing a component carrier includes forming a poorly adhesive structure on at least one layer structure, thereafter removing part of the poorly adhesive structure to thereby define a lateral limit of the poorly adhesive structure, thereafter attaching at least one further layer structure to the at least one layer structure and to the poorly adhesive structure, and forming a cavity by removing material of the at least one further layer structure above the poorly adhesive structure.

A component carrier with a stack including an electrically insulating layer structure and an electrically insulating structure has a tapering blind hole formed in the stack and an electrically conductive plating layer extending along at least part of a horizontal surface of the stack outside of the blind hole and along at least part of a surface of the blind hole. A minimum thickness of the plating layer at a bottom of the blind hole is at least 8 μm. A demarcation surface of the plating layer in the blind hole and facing away from the stack extends laterally outwardly from the bottom of the blind hole towards a lateral indentation and extends laterally inwardly from the indentation up to an outer end of the blind hole. An electrically conductive structure fills at least part of a volume between the plating layer and an exterior of the blind hole.

A power module for PCB embedding includes: a leadframe; a power semiconductor die with a first load terminal and control terminal at a first side of the die and a second load terminal at the opposite side, the second load terminal soldered to the leadframe; a first metal clip soldered to the first load terminal and forming a first terminal of the power module at a first side of the power module; and a second metal clip soldered to the control terminal and forming a second terminal of the power module at the first side of the power module. The leadframe forms a third terminal of the power module at the first side of the power module, or a third metal clip is soldered to the leadframe and forms the third terminal. The power module terminals are coplanar within +/−30 μm at the first side of the power module.

A printed circuit board (PCB) comprises a blind via and a discrete component vertically embedded within the blind via.

A wiring board includes: first and second insulating layers; a first wiring conductor layer located between the first and second insulating layers and including a first via land; a second wiring conductor layer located on the second insulating layer and including a second via land; a via hole penetrating from the upper to lower surfaces of the second insulating layer; and a via conductor located in the via hole and electrically connecting the first second via lands. The via conductor is located on the inner surface of the via hole and on the first via land via a first base layer containing nichrome and a second base layer located on the upper surface of the first base layer and containing the same metal as the via conductor. An alloy layer containing tin and nichrome is located between the first via land and the first base layer.

Forming, in a printed-wiring board, a via sufficiently filled without residual smear, for use in an insulating layer and the size of the via to be formed. A via of a printed-wiring board comprises a first filling portion which fills at least a center portion of a hole, and a second filling portion which fills a region of the hole that is not filled with the first filling portion. An interface which exists between the second and first filling portions, or an interface which exists between the second filling portion and an insulating layer and the first filling portion has the shape of a truncated cone comprising a tapered surface which is inclined to become thinner from a first surface toward a second surface, and an upper base surface which is positioned in parallel to the second surface and closer to the first surface than to the second surface.

A power module for PCB embedding includes: a leadframe; a power semiconductor die with a first load terminal and control terminal at a first side of the die and a second load terminal at the opposite side, the second load terminal soldered to the leadframe; a first metal clip soldered to the first load terminal and forming a first terminal of the power module at a first side of the power module; and a second metal clip soldered to the control terminal and forming a second terminal of the power module at the first side of the power module. The leadframe forms a third terminal of the power module at the first side of the power module, or a third metal clip is soldered to the leadframe and forms the third terminal. The power module terminals are coplanar within +/−30 μm at the first side of the power module.

A wiring circuit board includes a porous insulating layer, and a first conductive layer sequentially toward one side in the thickness direction. The first conductive layer includes a first signal wire and first ground wires. Each of the first ground wires is thicker than the first signal wire.

The main technical problem solved by the present disclosure is to provide a circuit board preparation method. The method includes: obtaining a to-be-processed plate comprising an insulating layer, a first copper layer, a second copper layer opposite to the first copper layer, a blind metalized hole, and a first tab facing the blind metalized hole; obtaining a white insulating material; laminating the white insulating material to a surface of the insulating layer, a surface of the first copper layer, a surface of the first tab, and a surface of the second copper layer to form a first white insulating medium layer and a second white insulating medium layer opposite to the first while insulating medium layer; and performing surface polishing for the first white insulating medium layer and grinding the first white insulating medium layer until the first tab is exposed to form a first white reflective layer.

A manufacturing method for a printed circuit board includes: passing a first laser beam output from a laser output device through a first aperture so as to define an outer diameter of the first laser beam, positioning the first laser beam by an optical axis positioning device including a galvano device and an fθ lens, and irradiating the printed circuit board with the first laser beam such that a through-hole is formed in a copper layer; and passing a second laser beam output from the laser output device through a second aperture so as to define an outer diameter of the second laser beam whereby a diameter of the second aperture is smaller than a diameter of the first aperture, positioning the second laser beam by the optical axis positioning device, and irradiating the printed circuit board with the second laser beam such that an insulating layer is processed.