A printed circuit board includes a first insulating layer having a through cavity and containing an insulating material. A length between one side surface and the other side surface opposite to the one side surface of the through cavity is greater than a thickness of the first insulating layer, and the first insulating layer includes a recess located in each of an upper edge and a lower edge of the one side surface of the through cavity.

A method of inspecting a printed wiring board includes preparing a printed wiring board having product and inspection regions such that the board has inner-layer lands in the regions, forming vias on the inner-layer lands in the regions, forming outer peripheral part(s) in the wiring board such that the outer peripheral part(s) expose outer peripheral portion(s) of the inner-layer land in the inspection region, determining a center coordinate of the inner-layer land in the inspection region based on a position of the outer peripheral part(s), determining a center coordinate of the via(s) in the inspection region based on a shape of the via(s) in the inspection region, determining a misalignment amount based on a distance between the center coordinate of the inner-layer land and the center coordinate of the via(s) in the inspection region, and determining alignment accuracy between the via and the inner-layer land based on the misalignment amount.

A method for manufacturing a wiring board includes preparing a core substrate having first and second surfaces, forming a first build-up structure including interlayer insulating layers and conductor layers on the first surface of the substrate, and forming a second build-up structure including interlayer insulating layers and one or more conductor layers on the second surface of the substrate. The forming of the first structure includes laminating the insulating layers and metal layers on first surface side of the substrate and forming the conductor layers from all of the metal layers on the first surface side, and the forming of the second structure includes laminating the insulating layers and metal layers on second surface side of the substrate, forming the one or more conductor layers from one or more of the metal layers on the second surface side, and entirely removing the other metal layers on the second surface side.

A printed circuit board includes: a base substrate including a unit region; a plurality of connection pads disposed on one surface of the base substrate; and first and second lead-in lines disposed on the one surface and respectively connected to at least a portion of the plurality of connection pads. The first and second lead-in lines have first and second cut surfaces on the one surface, respectively. The first cut surface is disposed in a position spaced apart from a side surface of the printed circuit board. The second cut surface is exposed to the side surface of the printed circuit board.

Readily modifiable and customizable, low-area overhead interconnect structures for forming connections between a system-in-a-package module and other components in an electronic device. One example may provide an interposer for providing an interconnection between a system-in-a-package module and other components in an electronic device. Another may provide a plurality of conductive pins or contacts to form interconnect paths between a module and other components.

There are provided a printed circuit board including: an insulation layer in which a via hole is formed; vias formed in the via hole; first circuit patterns formed below the insulation layer and electrically connected to the vias; and second circuit patterns formed on the insulation layer to be bonded to the vias; wherein the via has a diameter smaller than that of the via hole, and a method of manufacturing a printed circuit board.

Provided is a copper foil provided with a carrier in which the laser hole-opening properties of the ultrathin copper layer are good and which is suitable for producing a high-density integrated circuit substrate. A copper foil provided with a carrier having, in order, a carrier, an intermediate layer, and an ultrathin copper layer, wherein the specular gloss at 60° in an MD direction of the intermediate layer side surface of the ultrathin copper layer is 140 or less.

A wiring circuit board includes an insulating layer having a via penetrating in a thickness direction, a first conductive layer disposed on a one-side surface in the thickness direction of the insulating layer, a second conductive layer disposed on the other-side surface in the thickness direction of the insulating layer, and a conductive portion disposed on an inner peripheral surface of the via and electrically connecting the first and second conductive layers. Length L of 1 .Math.m-10 .Math.m inclusive, is measured by: drawing a segment joining first and second connection points from respectively, the one-side surface to the other-side surface in the thickness direction of the insulating layer and the inner peripheral surface in the cross-sectional view; identifying an outermost position farthest outward from the segment on the inner peripheral surface in the cross-sectional view; and measuring the length as the shortest distance from the segment to the outermost position.

A circuit carrier board structure includes a first substrate, a second substrate, an adhesive layer, and a plurality of contact pads. The first substrate includes a first surface and a second surface, and also includes a plurality of first build-up layers sequentially stacked. The first build-up layers include a first dielectric layer and a first circuit layer. The second substrate includes a third surface and a fourth surface, and also includes a plurality of second build-up layers sequentially stacked. The second build-up layers include a second dielectric layer and a second circuit layer. The second surface is combined to the third surface. The connection pads are on the first surface and electrically connected to the first circuit layer. The first substrate is electrically connected to the second substrate. A manufacturing method of the circuit carrier board structure is also provided.

The current disclosure provides a pickup and placing device including a control element, a substrate and a pickup structure. The substrate has an upper surface and a lower surface opposite to each other and a plurality of conductive via structures, wherein the conductive via structures are electrically connected to the control element. The pickup structure includes a plurality of pickup heads used for picking up or placing a plurality of light emitting diodes respectively. The pickup structure is disposed on the lower surface of the substrate or disposed in the substrate and extended outside the substrate, and the substrate is disposed between the control element and the pickup structure, wherein the pickup heads are electrically connected to the conductive via structures.