Abstract: A multilayer wiring board includes a core insulating layer with a first conductive wiring, a first insulating layer with a softening temperature lower than the core insulating layer, and a second insulating layer formed on the core insulating layer through the first insulating layer, the second insulating layer with a second conductive wiring electrically connected to the first conductive wiring and a softening temperature higher than the first insulating layer. The first insulating layer is mainly formed of a liquid crystal polymer. The core insulating layer and the second insulating layer are mainly formed of a polyimide resin or a bismaleimide triazine resin. The first conductive wiring and the second conductive wiring are electrically connected through a conductive via formed penetrating through the first insulating layer and the second insulating layer in a thickness direction.

Abstract: A multilayer wiring board includes a core insulating layer with a first conductive wiring, a first insulating layer with a softening temperature lower than the core insulating layer, and a second insulating layer formed on the core insulating layer through the first insulating layer, the second insulating layer with a second conductive wiring electrically connected to the first conductive wiring and a softening temperature higher than the first insulating layer. The first insulating layer is mainly formed of a liquid crystal polymer. The core insulating layer and the second insulating layer are mainly formed of a polyimide resin or a bismaleimide triazine resin. The first conductive wiring and the second conductive wiring are electrically connected through a conductive via formed penetrating through the first insulating layer and the second insulating layer in a thickness direction.

Abstract: An electromagnetic flow meter comprises a ceramic measuring pipe formed into a straight cylinder through which fluid to be measured flows, electromagnetic field generating device disposed adjacent to a central portion of an outer surface of the central portion of the ceramic measuring pipe for generating an electromagnetic field into a radial direction of the ceramic measuring pipe, electrodes for detecting an electric potential generated in the fluid, a case which accommodates the ceramic measuring pipe, the electromagnetic field generating device and the electrodes, and sealing members which are disposed between inner surfaces of the flanges of the case and ends of outer circumference of the ceramic measuring pipe. The case has a length longer than that of the ceramic measuring pipe and flanges at both ends thereof. Inner diameters of the flanges are slightly larger than an outer diameter of the ceramic measuring pipe.