摘要:
Provided is a method of manufacturing a circuit board. The method includes: preparing a base substrate including a core layer and a first conductive layer that is formed on at least one surface of the core layer and includes an internal circuit pattern; forming a build-up material to cover the first conductive layer; forming in the build-up material at least one cavity through which the core layer and the first conductive layer are exposed; forming a laminated body by curing the build-up material in which the at least one cavity is formed; and forming a second conductive layer including an external circuit pattern on an outer surface of the laminated body.
摘要:
A circuit board structure and a manufacturing method for a circuit board that ensures an electrical connection between a metal foil and a projection without using a conductive adhesive and is less likely to cause a decrease in the reliability of the connection due to the interlayer separation or the like is provided. A circuit board includes an insulating layer, a lower main surface wiring pattern and an upper main surface wiring pattern disposed on either side of the insulating layer, and an interlayer connection conductor passing through the insulating layer in a thickness direction and electrically connecting to the lower main surface wiring pattern and the upper main surface wiring pattern. The interlayer connection conductor is formed integrally with the lower main surface wiring pattern, and is bonded to the upper main surface wiring pattern via an intermetallic compound.
摘要:
A method for manufacturing printed wiring board includes irradiating laser on first surface of substrate such that first opening portion having first opening on the first surface and inner diameter decreasing toward the second surface is formed, irradiating laser on second surface of the substrate such that second opening portion having second opening on the second surface and inner diameter decreasing toward the first surface is formed and that the second portion joins the first portion and forms a penetrating hole penetrating through the substrate, forming a first circuit on the first surface, forming a second circuit on the second surface, and filling the hole with plating such that a through-hole conductor which electrically connects the first and second circuits is formed. The first opening has diameter same as or greater than diameter of the second opening, and the first portion has depth less than depth of the second portion.
摘要:
Provided is a method of manufacturing a circuit board. The method includes: preparing a base substrate including a core layer and a first conductive layer that is formed on at least one surface of the core layer and includes an internal circuit pattern; forming a build-up material to cover the first conductive layer; forming in the build-up material at least one cavity through which the core layer and the first conductive layer are exposed; forming a laminated body by curing the build-up material in which the at least one cavity is formed; and forming a second conductive layer including an external circuit pattern on an outer surface of the laminated body.
摘要:
A wiring board having a penetrating hole formed by forming holes with different shapes from both surfaces of a substrate. In such a penetrating hole, the depth of a first opening portion formed in the first-surface side of the substrate is shallower than the depth of a second opening portion formed in the second-surface side, and the diameter of a first opening is greater than the diameter of a second opening. Even if the gravity line of the first opening portion and the gravity line of the second opening portion are shifted from each other, the region of the second opening portion inserted into the inner space of the first opening portion may be made larger.
摘要:
A wiring substrate includes a first wiring layer, a first insulating layer, a second wiring layer, and a first wiring pattern. The second wiring layer includes a first metal foil that is thinner than the first wiring layer. A first via in the first insulating layer connects the first and second wiring layers. The first via is arranged to fill a first through hole and a first recess. The first through hole extends through the first insulating layer and has a first open end with a first opening diameter and a second open end with a smaller second opening diameter. The first recess is in communication with the first through hole. The first recess has a larger diameter than the second opening diameter. The first metal foil includes a first opening communicating with the first through hole and having a larger opening diameter larger than the first opening diameter.
摘要:
A multilayer printed wiring board includes one or more resin layers having via-holes and a core layer having via-holes. The via-holes formed in the one or more resin layers are open in the direction opposite to the direction in which the via-holes formed in the core layer are open. A method for manufacturing a multilayer printed wiring board includes a step of preparing a single- or double-sided copper-clad laminate; a step of forming lands by processing the copper-clad laminate; a step of forming a resin layer on the upper surface of the copper-clad laminate, forming openings for via-holes in the resin layer, and then forming the via-holes; and a step of forming openings for via-holes in the lower surface of the copper-clad laminate and then forming the via-holes.
摘要:
A method of manufacturing a wire may include forming a wire pattern, which at least includes a first conductive layer, a second conductive layer, and a third conductive layer arranged in the order stated on a substrate. At least the second conductive layer may have higher etch selectivity than the first and third conductive layers. Side holes may be formed by removing portions of the second conductive layer at ends of the wire pattern, and fine wires may be formed by injecting a masking material into the side holes and patterning the wire pattern by using the masking material as a mask.
摘要:
A method of manufacturing a multi-layer circuit board includes: forming a first circuit layer on a first surface of a first prepreg; stacking a second prepreg on a first surface of the first circuit layer; and forming at least one of a second or a third circuit layer on at least one of a first surface of the second prepreg and a second surface opposite of the first surface of the first prepreg, wherein, in the stacking of the first prepreg, the first prepreg and the second prepreg are semi-cured.
摘要:
A process for fabricating a wiring board is provided. In the process, a wiring carrying substrate including a carry substrate and a wiring layer is formed. Next, at least one blind via is formed in the wiring carrying substrate. Next, the wiring carrying substrate is laminated to another wiring carrying substrate via an insulation layer. The insulation layer is disposed between the wiring layers of the wiring carrying substrates and full fills the blind via. Next, parts of the carry substrates are removed to expose the insulation layer in the blind via. Next, a conductive pillar connected between the wiring layers is formed. Next, the rest carry substrates are removed.