摘要:
A method for forming a hole plug in a laminate structure is provided. A laminate structure, is formed, including at least a dielectric layer and a first conductive foil on a first side of the dielectric layer. An unpierced or blind hole is formed in the laminate structure extending toward the first conductive foil from a second side of the dielectric layer and at least partially through the dielectric layer, the hole having a hole depth to hole diameter aspect ratio of less than ten (10) to one (1). In yet another example, the hole aspect ratio may be less than one (1) to one (1). Via fill ink may then be deposited in the hole. The via fill ink is then dried and/or cured to form a hole plug.
摘要:
The method includes the steps of: positioning an electronic component (14) using main marks (A and B) formed on a metal layer (4) as references and mounting the electronic component (14) on a second surface (5) of the metal layer (4) with an adhesive layer (18) interposed between the metal layer (4) and both of the electronic component (14) and terminals (20); then burying the electronic component (14) and the main marks (A and B) in an insulating substrate (34); then removing part of the metal layer (4) and forming a first window (W1) for exposing the main marks (A and B) therefrom and a second window (W2) for exposing the adhesive layer (18) including a position corresponding to the terminal (20) therefrom; then determining the position of the terminal (20) using the exposed main marks (A and B) as references and forming a laser via hole LVH (46) reaching the terminal (20) in the adhesive layer (18) exposed from the second window (W2); and thereby forming a wiring pattern (50) from the metal layer (4) electrically connected to the terminal (20) through a first conductive via (47) formed by plating the LVH (46) with copper.
摘要:
A wiring board unit includes a connector having a plurality of terminals; and a wiring board on which the connector is mounted. The wiring board includes a first wiring pattern provided on a first wiring layer, a second wiring pattern provided on a second wiring layer at a position shallower than the first wiring layer, a first via formed in a first recess having a first depth, the first via being in contact with the first wiring pattern, and a second via formed in a second recess having a second depth that is smaller than the first depth, the second via being in contact with the second wiring pattern.
摘要:
In a multilayer printed wiring board, insulating layers and conductor layers are alternately stacked, and the conductor layers are electrically connected through via holes arranged on the insulating layers. The via hole is formed to have a swell at least on a part of it, in a substantially vertical direction to a thickness direction of the insulating layer. External stresses, such as a force of impact when dropped, are suppressed to have an insulating substrate not to easily warp, and cracks, disconnection, and the like of the conductor circuit are prevented. Thus, deterioration of reliability and drop impact resistance of a mounting substrate can be reduced.
摘要:
Copper plating baths containing a leveling agent that is a reaction product of a certain benzimidazole with a certain epoxide-containing compound that deposit copper on the surface of a conductive layer are provided. Such plating baths deposit a copper layer that is substantially planar on a substrate surface across a range of electrolyte concentrations. Methods of depositing copper layers using such copper plating baths are also disclosed.
摘要:
A multilayer printed circuit board (5010) comprises a core board (5030) and, as constructed on both sides thereof, a buildup wiring layer obtainable by building up an interlayer resin insulating layer (5050, 5150) and a conductor layer (5058, 5158) alternately with said conductor layers (5058, 5158) being interconnected by via holes (5160). The via holes (5060, 5160) are formed immediately over plated-through holes (5036) in the manner of plugging the through holes (5016) in the core board (5030). In a process for manufacturing the multilayer printed circuit board (5010), the through holes (5016) are pierced by laser light to be not larger than 200 µm in diameter.