摘要:
A method of manufacturing a printed circuit board includes the following steps (A) to (D). (A) Laminating a resin insulating layer on each of two sides of a core member to form a core substrate, (B) forming penetrating openings in the core substrate by applying laser beams, (C) forming a rough surface on the core substrate, and (D) providing a metal film for each penetrating opening to form through holes.
摘要:
A multi-layer printed circuit board including a first insulating layer, a first conductor layer having conductor circuits on one surface of the first insulating layer, a second conductor layer having conductor circuits on the opposite surface of the first insulating layer, a second insulating layer on the second conductor and first insulating layers, and a third conductor layer having conductor circuits on the second insulating layer on the opposite side of the second conductor layer. The first and second insulating layers have first and second via holes which are formed in openings of the first and second insulating layers and made of conductive materials filled to the top of the openings such that conductor circuits in the first and third conductor layers are connected to one or more conductor circuits in the second conductor layer, and the first and second via holes are tapering toward the second conductor layer.
摘要:
A printed circuit board includes a chip capacitor having electrodes and a metal film formed on one or more of the electrodes, an accommodating layer accommodating the chip capacitor inside the accommodating layer, a connection layer formed over the accommodating layer and having a via hole opening extending to the metal film, and a first via hole structure formed in the via hole opening of the connection layer and connected to the metal film on the one or more of the electrodes of the chip capacitor.
摘要:
Chip capacitors are provided in a printed circuit board. In this manner, the distance between an IC chip and each chip capacitor is shortened, and the loop inductance is reduced. In addition, the chip capacitors are accommodated in a core substrate having a large thickness. Therefore, the thickness of the printed circuit board does not become large.
摘要:
A chip capacitor 20 is provided in a core substrate 30 of a printed circuit board 10. This makes it possible to shorten a distance between an IC chip 90 and the chip capacitor 20 and to reduce loop inductance. Since the core substrate 30 id constituted by provided a first resin substrate 30a, a second resin substrate 30b and a third resin substrate 30c in a multilayer manner, the core substrate 30 can obtain sufficient strength.
摘要:
Chip capacitors 20 are provided in a printed circuit board 10. In this manner, the distance between an IC chip 90 and each chip capacitor 20 is shortened, and the loop inductance is reduced. In addition, the chip capacitors 20 are accommodated in a core substrate 30 having a large thickness. Therefore, the thickness of the printed circuit board does not become large.
摘要:
Chip capacitors 20 are provided in a printed circuit board 10. In this manner, the distance between an IC chip 90 and each chip capacitor 20 is shortened, and the loop inductance is reduced. In addition, the chip capacitors 20 are accommodated in a core substrate 30 having a large thickness. Therefore, the thickness of the printed circuit board does not become large.
摘要:
Chip capacitors 20 are provided in a printed circuit board 10. In this manner, the distance between an IC chip 90 and each chip capacitor 20 is shortened, and the loop inductance is reduced. In addition, the chip capacitors 20 are accommodated in a core substrate 30 having a large thickness. Therefore, the thickness of the printed circuit board does not become large.
摘要:
A metal layer 18 is sandwiched between insulating layers 14 and 20 so that required strength is maintained. Hence it follows that the thickness of a core substrate 30 can be reduced and, therefore, the thickness of a multi-layer printed circuit board can be reduced. Formation of non-penetrating openings 22 which reach the metal layer 18 in the insulating layers 14 and 20 is simply required. Therefore, small non-penetrating openings 22 can easily be formed by applying laser beams. Thus, through holes 36 each having a small diameter can be formed.
摘要:
A multi-layer printed circuit board includes a core structure including resin layers and conductor circuits sandwiched by the resin layers, the core structure having first and second surfaces, a first conductor layer including conductor circuits on the first surface of the core structure, and a second conductor layer including conductor circuits on the second surface of the core structure. The core structure includes first and via holes, and the first and second via holes include a metal filling up to the respective top of openings in the resin layers, respectively, sandwich one or more conductor circuits in the core structure and are positioned vertically to form a through hole electrically connecting respective ones of the conductor circuits of the first and second conductor layers, and the first and second via holes are deviated from each other in a vertical direction.