Abstract: A magnetic ceramic substrate includes a base material made of magnetic ceramic and a conductor pattern formed to be in contact with a surface of the base material. The surface of the base material is smooth, and the conductor pattern contains a metal conductor and amorphous glass. A circulator includes the magnetic ceramic substrate.

Abstract: A light source device that supplies a constant current to a diode load that includes a plurality of light-emitting elements connected in series. The light source device includes a power supply circuit connected to the diode load and a peak current limiting circuit connected in series to the diode load. The peak current limiting circuit includes a current detector that is connected in series to the diode load and a current-regulating circuit that controls a current to the diode load by a detection voltage of the current detector. Further, the current detector has a series circuit including a resistor and a coil.

Abstract: A light source device that supplies a constant current to a diode load that includes a plurality of light-emitting elements connected in series. The light source device includes a power supply circuit connected to the diode load and a peak current limiting circuit connected in series to the diode load. The peak current limiting circuit includes a current detector that is connected in series to the diode load and a current-regulating circuit that controls a current to the diode load by a detection voltage of the current detector. Further, the current detector has a series circuit including a resistor and a coil.

Abstract: A cavity is formed in a surface of a dielectric component on the permanent magnet side. The cavity has a bottom surface extending in a direction along one main surface and a side surface extending in a thickness direction crossing the bottom surface. At least a part of the permanent magnet is disposed in the cavity. A surface of at least a part of the permanent magnet disposed in the cavity is fixed to both of the bottom surface and the side surface through an adhesive.

Abstract: A cavity is formed in a surface of a dielectric component on the permanent magnet side. The cavity has a bottom surface extending in a direction along one main surface and a side surface extending in a thickness direction crossing the bottom surface. At least a part of the permanent magnet is disposed in the cavity. A surface of at least a part of the permanent magnet disposed in the cavity is fixed to both of the bottom surface and the side surface through an adhesive.

Abstract: In a non-reciprocal circuit element, a permanent magnet is connected to one main surface of a magnetic plate, and a circuit board is connected to the other main surface of the magnetic plate, with a solder bump lying between the circuit board and the other main surface. The permanent magnet can control the transmission of electrical signal from each of a plurality of signal conductors of circuit board to a corresponding one of a plurality of input/output terminals of the magnetic plate. The non-reciprocal circuit element further includes an underfill material arranged between the magnetic plate and the circuit board. The magnetic plate has a through hole formed therein, the through hole extending from one main surface to the other main surface. The through hole has an empty space in which at least a part of a conductive film arranged in the through hole is exposed.

Abstract: A process apparatus includes an electrostatic chuck disposed at a substrate holder. The electrostatic chuck includes a dielectric and an electrode. The electrode is disposed in an interior of the dielectric. The apparatus further includes a circuit electrically connected to the electrode of the electrostatic chuck and a first earth wire electrically connected to the circuit. The first earth wire is shielded by a metal with an electrically insulating cover interposed.

Abstract: A light emitting device includes a semiconductor laser element configured to emit a first light, a wavelength converting member configured to emit a second light upon being irradiated by the first light, and a support member defining a through-hole allowing an optical path of the first light to pass through. The through-hole is defined by, in order from a light incident side to a light emitting side with respect to the first light, a lower portion with opening width decreasing from the light incident side to the light emitting side, and an upper portion where the wavelength converting member is fixed. The semiconductor laser element is disposed at a location allowing the first light to enter the lower portion of the through-hole while also allowing a part of the first light to be reflected at a wall defining the lower portion of the through-hole.

Abstract: An irreversible circuit element that can reduce manufacturing costs by preventing faults that lead to product defects includes a magnetic body, a magnetic body securing casing, and a magnet. The magnetic body securing casing is arranged so as to surround the magnetic body. The magnet is arranged on one side of the magnetic body. The magnetic body securing casing includes a first electrode on one casing main surface arranged on the one side, a second electrode on the other casing main surface arranged on the other side opposite to the one side, and a through-conductor that passes through the magnetic body securing casing and electrically connects the first electrode to the second electrode. The first electrode is connected to a first wiring arranged on the one side of the magnetic body.

Abstract: In a non-reciprocal circuit element, a permanent magnet is connected to one main surface of a magnetic plate, and a circuit board is connected to the other main surface of the magnetic plate, with a solder bump lying between the circuit board and the other main surface. The permanent magnet can control the transmission of electrical signal from each of a plurality of signal conductors of circuit board to a corresponding one of a plurality of input/output terminals of the magnetic plate. The non-reciprocal circuit element further includes an underfill material arranged between the magnetic plate and the circuit board. The magnetic plate has a through hole formed therein, the through hole extending from one main surface to the other main surface. The through hole has an empty space in which at least a part of a conductive film arranged in the through hole is exposed.

Abstract: A light emitting device includes a semiconductor laser element configured to emit a first light, a wavelength converting member configured to emit a second light upon being irradiated by the first light, and a support member defining a through-hole allowing an optical path of the first light to pass through. The through-hole is defined by, in order from a light incident side to a light emitting side with respect to the first light, a lower portion with opening width decreasing from the light incident side to the light emitting side, and an upper portion where the wavelength converting member is fixed. The semiconductor laser element is disposed at a location allowing the first light to enter the lower portion of the through-hole while also allowing a part of the first light to be reflected at a wall defining the lower portion of the through-hole.

Abstract: Input/output terminals 6a, 6b and 6c are formed within portions of cutouts 5a, 5b and 5c provided in a ground conductor 5 on the underside of a magnetic material 3; signal conductors 9a, 9b and 9c are formed within portions of cutouts 8a, 8b and 8c provided in a ground conductor 8 on the top surface of a dielectric substrate 7 at the same places as the cutouts 5a, 5b and 5c of the ground conductor; through holes 10a, 10b and 10c electrically connect a center conductor 4 to the input/output terminals 6a, 6b and 6c; metal bumps 11a, 11b and 11c electrically connect the input/output terminals 6a, 6b and 6c to the signal conductors 9a, 9b and 9c facing each other; and metal bumps 16 electrically connect the ground conductor 5 to the ground conductor 8.

Abstract: Input/output terminals 6a, 6b and 6c are formed within portions of cutouts 5a, 5b and 5c provided in a ground conductor 5 on the underside of a magnetic material 3; signal conductors 9a, 9b and 9c are formed within portions of cutouts 8a, 8b and 8c provided in a ground conductor 8 on the top surface of a dielectric substrate 7 at the same places as the cutouts 5a, 5b and 5c of the ground conductor; through holes 10a, 10b and 10c electrically connect a center conductor 4 to the input/output terminals 6a, 6b and 6c; metal bumps 11a, 11b and 11c electrically connect the input/output terminals 6a, 6b and 6c to the signal conductors 9a, 9b and 9c facing each other; and metal bumps 16 electrically connect the ground conductor 5 to the ground conductor 8.

Abstract: According to one embodiment, a semiconductor device includes first layer that includes a first metal element and a second layer that is provided on the first layer and includes the first metal element and a second metal element that is different from the first metal element. The semiconductor device also includes a solder layer that is provided on the second layer such that the second layer is between the first and solder layers. The solder layer includes the second metal element.

Abstract: The semiconductor device includes a first semiconductor layer of the first conductive type, a second semiconductor layer having the cubic crystalline structure formed on the first semiconductor layer, an electrode formed on the second semiconductor layer, and a reactive region formed between the second semiconductor layer and the electrode. The second semiconductor layer includes an upper surface that is tilted from the (100) plane. The reactive region includes at least one element constituting the second semiconductor layer, at least one element constituting the electrode, and forming a protuberance extending toward the second semiconductor layer.

Abstract: A semiconductor device includes a first metal layer disposed on a first surface of a semiconductor layer, or a portion thereof. The first metal layer is made of a first metal. At least a portion of the first metal layer is crystallized. A second metal layer is disposed on a second surface of the semiconductor layer. The second surface is opposite the first surface. The second metal layer is also made of the first metal and has at least a portion that is crystallized. In some embodiments, the first metal may be nickel. In some embodiments, the semiconductor device may be a power semiconductor device, such as an insulated gate bipolar transistor and a fast recovery diode.

Abstract: A method of inspecting a semiconductor device includes attaching an inspection tool on a back surface of a semiconductor substrate including the semiconductor device, the inspection tool including a sheet and a holding frame, the sheet being larger than the semiconductor substrate and being provided with an opening in a center portion of the sheet, the opening being smaller than the semiconductor substrate, the holding frame holding an outer periphery of the sheet, and a supporting substrate being attached on a front surface of the semiconductor substrate, removing the supporting substrate attached on the front surface of the semiconductor substrate, and measuring electrical characteristics of the semiconductor device.

Abstract: According to one embodiment, a method is disclosed for manufacturing a semiconductor device. The method can include forming a base region and an emitter region in a front surface of a semiconductor layer. The method can include forming a first impurity implantation region by implanting first impurity of a first conductivity type into a back surface of the semiconductor layer. The method can include selectively forming a second impurity implantation region by selectively implanting second impurity of a second conductivity type into the first impurity implantation region. In addition, the method can include irradiating the first impurity implantation region and the second impurity implantation region with laser light. A peak of impurity concentration profile in a depth direction of at least one of the first impurity implantation region and the second impurity implantation region before irradiation with the laser light is adjusted to a depth of 0.05 ?m or more and 0.

Abstract: The semiconductor device includes a first semiconductor layer of the first conductive type, a second semiconductor layer having the cubic crystalline structure formed on the first semiconductor layer, an electrode formed on the second semiconductor layer, and a reactive region formed between the second semiconductor layer and the electrode. The second semiconductor layer includes an upper surface that is tilted from the (100) plane. The reactive region includes at least one element constituting the second semiconductor layer, at least one element constituting the electrode, and forming a protuberance extending toward the second semiconductor layer.

Abstract: An aspect of the present embodiment, there is provided a shield plate configured to cover a semiconductor substrate including a semiconductor device in which a first semiconductor element and a second semiconductor element are included, in implanting charged particles into the semiconductor substrate to provide a lifetime control layer in the semiconductor substrate, including, an alignment mark configured to align with respect to a semiconductor substrate, a first region configured to cover the first semiconductor element, and a second region configured to cover the second semiconductor element, a thickness of the second region being thinner than a thickness of the first region.