Abstract:
An electrical contact pad for electrically contacting a connector includes first, second and third regions. The first region is connected to a trace. The second region is adjacent to the first region and has a width less than the first region. The third region is adjacent to the second region and has a width that is greater than the second region. The third region is sized to make contact with a connector. Having the width of the second region be smaller than the width of the first and third regions increases an impedance of the electrical contact pad.
Abstract:
A wiring substrate (1) includes an electrode (12) including Cu or a Cu alloy, and a plated film (14) including an electroless nickel-plated layer (18) formed on the electrode (12) and an electroless gold-plated layer (22) formed on the electroless nickel-plated layer (18). The electroless nickel-plated layer (18) is formed by co-precipitation of Ni, P, Bi, and S, the electroless nickel-plated layer (18) includes a content of P of 5% by mass or more and less than 10% by mass, a content of Bi of 1 ppm by mass to 1,000 ppm by mass, and a content of S of 1 ppm by mass to 2,000 ppm by mass, and a mass ratio of the content of S to the content of Bi (S/Bi) is more than 1.0.
Abstract:
A wiring substrate (1) includes an electrode (12) including Cu or a Cu alloy, and a plated film (14) including an electroless nickel-plated layer (18) formed on the electrode (12) and an electroless gold-plated layer (22) formed on the electroless nickel-plated layer (18). The electroless nickel-plated layer (18) is formed by co-precipitation of Ni, P, Bi, and S, the electroless nickel-plated layer (18) includes a content of P of 5% by mass or more and less than 10% by mass, a content of Bi of 1 ppm by mass to 1,000 ppm by mass, and a content of S of 1 ppm by mass to 2,000 ppm by mass, and a mass ratio of the content of S to the content of Bi (S/Bi) is more than 1.0.
Abstract translation:布线基板(1)包括包含Cu或Cu合金的电极(12)和包括形成在电极(12)上的化学镀镍层(18)的镀膜(14)和无电镀金层 (22)形成在无电镀镍层(18)上。 化学镀镍层(18)通过Ni,P,Bi和S的共沉淀形成,化学镀镍层(18)的P含量为5质量%以上且小于10倍 质量%,Bi含量为1质量ppm〜1,000质量ppm,S含量为1质量ppm〜2000质量ppm,S含量与Bi含量的质量比( S / Bi)大于1.0。
Abstract:
Described are various configurations of high-speed via structures. Various embodiments can reduce or entirely eliminate insertion loss in high-speed signal processing environments by using impedance compensation structures that decrease a mismatch in components of a circuit. An impedance compensation structure can include a metallic structure placed near a via to lower an impedance difference between the via and a conductive pathway connected to the via.