Abstract: A piezoelectric substrate according to the present disclosure includes: a base body; an electrode formed at the base body; and a piezoelectric layer formed at the electrode and containing potassium, sodium, and niobium. A value of IR2/IR1 obtained by dividing an integrated intensity IR2 at a peak 2 by an integrated intensity IR1 at a peak 1, when a surface of the piezoelectric layer is measured by Fourier transform infrared spectroscopy, is less than 0.086. Here, the peak 1 has a strongest area intensity among peaks detected at wavenumbers of 475 cm?1 to 700 cm?1, and the peak 2 has an area intensity that is a sum of area intensities of peaks detected at wavenumbers of 1200 cm?1 to 1645 cm?1.

Abstract: A transformer includes a core group and a winding group. Each of a plurality of winding layers penetrates through a plurality of closed magnetic circuits formed by a plurality of cores. When viewed from the top, the cores are disposed with spacing along conductor wires through which current of the winding layers flows, and the winding layers are disposed side by side from the inside to the outside with spacing along a direction intersecting the direction of current. With this configuration, a coil device with good heat dissipation performance, compact size, high efficiency, and low costs can be provided.

Abstract: When a liquid crystal panel in which a liquid crystal is enclosed between two substrates is manufactured, a space is provided as an aperture when the liquid crystal is injected, and a sealant for bonding the two substrates is applied to one of the two substrates along a first path encompassing a first area in which the liquid crystal is enclosed, and a second path encompassing a second area facing the first area with the space interposed between the areas. The two substrates to one of which the sealant is applied are bonded. In the system according to the present invention, only the sealant applied along the second path is hardened first on the bonded two substrates. After hardening the sealant applied along the second path, a hole which is an aperture for forcibly removing a gas generated when the sealant of the first path is hardened is formed.

Abstract: An information processing unit of the present invention includes a display control unit that causes an icon display area, in which a plurality of icons related to each other are grouped, to be displayed and an operation unit that receives various operations by a user. When the operation unit inputs a command for expanding or contracting the icon display area in a one-dimensional direction which is the same as an arrangement direction of the plurality of the icons in the icon display area, the display control unit causes the icon display area to be expanded or contracted in the one-dimensional direction. With such a configuration, the operability can be enhanced by shortening a time for searching for a desired icon.