摘要:
In a semiconductor device including a semiconductor element that produces heat and a substrate on which the semiconductor element is mounted, functions of the substrate are divided between a heat dissipating substrate and a wiring substrate. The heat dissipating substrate has a relatively high thermal conductivity, and includes principal surfaces defined by electric insulators, one of which is provided with an outer conductor located thereon. The wiring substrate is mounted on the upper principal surface of the heat dissipating substrate, has a thermal conductivity lower than that of the heat dissipating substrate, and includes a wiring conductor made mainly of silver or copper and located inside the wiring substrate, the wiring conductor being electrically connected to the outer conductor. The semiconductor element is mounted on the upper principal surface of the heat dissipating substrate and disposed in a through hole of the wiring substrate.
摘要:
An ozone generating element includes a laminated body including stacked dielectric layers. A discharge electrode is provided on a first of the dielectric layers. An induction electrode is provided on a second of the dielectric layers that is opposed to the discharge electrode with the first dielectric layer interposed therebetween. A protective layer is arranged on the first dielectric layer so as to cover the discharge electrode, and includes a glass ceramic.
摘要:
In a semiconductor device including a semiconductor element that produces heat and a substrate on which the semiconductor element is mounted, functions of the substrate are divided between a heat dissipating substrate and a wiring substrate. The heat dissipating substrate has a relatively high thermal conductivity, and includes principal surfaces defined by electric insulators, one of which is provided with an outer conductor located thereon. The wiring substrate is mounted on the upper principal surface of the heat dissipating substrate, has a thermal conductivity lower than that of the heat dissipating substrate, and includes a wiring conductor made mainly of silver or copper and located inside the wiring substrate, the wiring conductor being electrically connected to the outer conductor. The semiconductor element is mounted on the upper principal surface of the heat dissipating substrate and disposed in a through hole of the wiring substrate.
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.