Abstract:
In a microwave device, for example a microwave local oscillator with a harmonic mixer for feedback control, problems of coupling the mixer circuit to the R.F. cavity are overcome by providing a d.c. blocking capacitor of the mixer on a planar surface of a support extending across an aperture in one wall of the cavity. In preferred embodiments the capacitor is a planar device formed by a plurality of interdigitated fingers. These fingers are oriented to couple magnetically with the R.F. energy at the aperture in the cavity. The support conveniently comprises a printed circuit board having a ground plane on the same surface as the capacitor, which is located in a small opening in the ground plane. A second ground plane is provided on the opposite side of the printed circuit board, overlying the opening. The two ground planes are interconnected by plate-through-holes.
Abstract:
Provided is a mounting structure that can bond a first heat dissipation element to a second substrate through a hole in a first substrate without using a binder such as solder, an adhesive, or the like. A mounting structure of the present disclosure includes a first substrate (10) in which a penetrating hole (11) is formed, a second substrate (20) and a first heat dissipation element (30) overlapped with both surfaces of the first substrate (10), respectively, so as to cover the penetrating hole (11), and a second heat dissipation element (40) sandwiched and attached between the second substrate (20) and the first heat dissipation element (30) inside the penetrating hole (11).
Abstract:
Examples of a thermal management unit and an electronic apparatus utilizing the thermal management unit are described. In one aspect, the thermal management unit includes a heat sink. The heat sink includes a base portion, a first protrusion structure and a second protrusion structure. The base portion has a first side and a second side opposite the first side. The first protrusion structure protrudes from the first side of the base portion, and includes multiple fins. The second protrusion structure protrudes from the second side of the base portion, and includes multiple ribs. The heat sink may be made of silicon.
Abstract:
An optical module includes: a flexible board having a first surface on which a component is mounted and a second surface opposite to the first surface; a bottom electrode part having a bottom surface on which a heat release electrode is provided, the bottom electrode part mounted on the first surface of the flexible board; and a heat release member configured to absorb heat from the bottom electrode part and release the heat to outside. The heat release member is arranged close to said second surface of the flexible board at a position where the bottom electrode part is mounted.
Abstract:
Provided is a circuit board including: a support substrate including a first region and a second region extending to be bent from the first region; light emitting devices mounted to the first region of the support substrate; and a bending portion bent between the first region and the second region, wherein the bending portion comprises: an interconnection line arrangement portion that crosses an interconnection line; and an interconnection line protection portion disposed on the periphery of the interconnection line, wherein the interconnection line protection portion protrudes more than the interconnection line arrangement portion.
Abstract:
Provided are a semiconductor light emitting module and a method of manufacturing the same, which allow achieving high luminance light emission as well as lightweight and compact features. In a semiconductor light emitting module (101), a projecting portion (202) serving as a reflecting member is formed on a metal thin plate (102) to surround a semiconductor light emitting element (104). The semiconductor light emitting element (104) is connected to a printed board (103) by using a wire (201), for example. The projecting portion (202) is formed by pressing and bending the metal thin plate (102) from a back surface, for example, to surround the element and to be higher than the semiconductor light emitting element (104).
Abstract:
A flip chip light emitting diode (LED) packaging structure, including a substrate, an LED chip including a P electrode and a N electrode. A protruding platform is formed in a center of the substrate. The protruding platform includes a first connecting portion and a second connecting portion electrically insulating from each other. The P electrode and the N electrode is conductively fixed to the protruding platform by solder, and a bottom edge of the P electrode and the N electrode are beyond a top edge of the protruding platform.
Abstract:
A light emitting diode (LED) package including a substrate unit, a light emitting unit and an encapsulant. The substrate unit includes a metal substrate and a circuit board. The metal substrate has a first carrier portion and a second carrier portion. The second carrier portion is projected from the first carrier portion. The first carrier portion has a first carrier face. The second carrier portion has a second carrier face located higher than the first carrier face. The circuit board is disposed on the first carrier face, and the second carrier portion passes through the circuit board. The light emitting unit includes at least one LED chip disposed on the second carrier face of the second carrier portion, and the LED chip electrically connected to the circuit board. The encapsulant encapsulates the LED chip.
Abstract:
An assembly for use in a solid state directional lamp is disclosed. The assembly includes a multilayer FR4 printed circuit board and a metal heat spreader assembled with the multilayer FR4 printed circuit board. The assembly is configured to mount a plurality of solid state light emitters. The multilayer FR4 printed circuit board defines an aperture and a least a portion of the metal heat spreader is positioned in the aperture of the multilayer FR4 printed circuit board. The portion of the heat spreader positioned in the aperture of the multilayer FR4 printed circuit board is in communication with heat dissipation means.
Abstract:
A flexible metal core printed circuit board assembly comprises a flexible printed circuit board structure. The flexible printed circuit board structure includes a flexible substrate, a conductive layer on the flexible substrate and a space formed in the flexible printed circuit board structure. The space extends through the flexible printed circuit board structure. The flexible metal core printed circuit board assembly further comprises a flexible conductive structure having a pillar. The flexible conductive structure is provided underneath the flexible printed circuit board structure with the pillar disposed in the space. The pillar has a top surface that is in a planar surface with a top surface of the flexible printed circuit board structure.