Abstract:
A lighting arrangement (10) is disclosed, comprising a substrate (11) for mechanically and electrically connecting at least one light-emitting element (12) thereto. The substrate (11) comprises at least a first side (13) and a second side (14), and a circumferential edge (20) along a periphery of the substrate, the circumferential edge (20) extending between the first side (13) and the second side (14), and at least one electrically conductive region (16) disposed on the first side (13). The lighting arrangement (10) comprises at least one thermally conductive element (18) arranged such that the at least one thermally conductive element (18) is coupled to at least a portion of the second side (14) and to at least a portion of an outer surface (17) of the circumferential edge (20), and such that the at least one thermally conductive element (18) is not coupled to the at least one electrically conducting region (16).
Abstract:
A circuit board according to an embodiment includes: a first insulating layer that does not include a reinforcing material; a conductive pad that protrudes above a surface of the first insulating layer, and a second insulating layer that is disposed below the first insulating layer and includes a reinforcing material. A corner of the conductive pad has a curved shape.
Abstract:
A substrate including a base substrate and first to fourth identification codes on the base substrate, wherein the substrate is one of a plurality of substrates at a row ‘c’ and a column ‘d’ in a (b)th strip of an (a)th panel, where ‘a’, ‘b’, ‘c’ and ‘d’ are natural numbers, the plurality of substrates being included in the (b)th strip of the (a)th panel, the first identification code includes information on the ‘a’, the second identification code includes information on the ‘b’, the third identification code includes information on the ‘c’, and the fourth identification code includes information on the ‘d’, may be provided.
Abstract:
A printed circuit board includes an insulating layer, a circuit pattern on the insulating layer, and a surface treatment layer on the circuit pattern. The surface treatment layer includes a bottom surface having a width wider than a width of a top surface of the circuit pattern.
Abstract:
A solder resist is configured such that pattern covering portions of the solder resist covering straight portions of adjacent wiring patterns are separated from each other in an area outside of a resin mold part. Thus, even if the solder resist is cracked, cracks will not be formed so as to connect between the adjacent wiring patterns. As such, even if moisture generated by condensation or the like enters in the crack, it is less likely that a short circuit will occur between the adjacent wiring patterns.
Abstract:
A printed wiring board includes: a core substrate having a core layer, first and second conductor layers, and through-hole conductors penetrating through the core layer and connecting the conductor layers; and first and second build-up layers each including an insulating layer, an inner side conductor layer, an outermost insulating layer, an outermost conductor layer, and a solder resist layer. Each of the conductor layers includes conductor circuits having substantially a trapezoid cross-sectional shape, and spaces between adjacent conductor circuits, and includes a metal foil, a seed layer, and an electrolytic plating film. The inner side conductor layers have the smallest minimum circuit width, the smallest minimum space width and the largest base angle among the conductor layers. The insulating layers have the smallest ten-point average roughness rz3, rz7 among the ten-point average roughness rz3, rz7, rz1, rz2, rz5 and rz9 of the core layer, insulating layers and outermost insulating layers.
Abstract:
A via conductor connected to a mounting electrode near a corner portion of a circuit substrate is provided in a position in a corresponding mounting electrode, located closer to the center of the circuit substrate. Thus, concentration of a stress in a portion of the via conductor is effectively reduced, and a break, a chip, or a crack is prevented from occurring to the circuit substrate. Even if the portion located closer to the corner portion of the mounting electrode is peeled from the circuit substrate, the electrical characteristics of the circuit module are secured because disconnection between the corresponding mounting electrode and the via conductor is prevented.
Abstract:
A printed circuit board includes: an insulating layer; a plating seed layer disposed on the insulating layer; a circuit pattern layer disposed on the plating seed layer and formed of copper (Cu); and a surface treatment layer disposed on the circuit pattern layer and formed of gold (Au), wherein a width of a bottom surface of the surface treatment layer is narrower than a width of a top surface of the plating seed layer, wherein the bottom surface of the surface treatment layer includes: a first portion contacted with the circuit pattern layer; and a second portion non contacted with the circuit pattern layer, and wherein a width of a top surface of the circuit pattern layer is narrower than a width of a bottom surface of the circuit pattern layer.
Abstract:
A printed substrate includes: a substrate; a copper layer formed on the substrate; and a resin formed on the substrate to cover a part of the copper layer, wherein the copper layer includes a first region covered by the resin and a second region in which a shield sheet metal is installed, the shield sheet metal surrounding a predetermined region of the substrate, and wherein an angle formed between an outer edge portion of the copper layer covered by the resin and an outer edge portion of the resin which covers the copper layer at a location at which the outer edge portion of the copper layer and the outer edge portion of the resin intersect each other as viewed in plan is an obtuse angle.
Abstract:
A microwave device can include a printed circuit board substrate having a first microwave device subcircuit and a microdevice substrate having a second microwave device subcircuit. The first microwave device subcircuit may be formed at a low resolution and a low tolerance, while the second microwave device subcircuit may be formed at a high resolution and a high tolerance. The first microwave device subcircuit and the second microwave device subcircuit may be electrically coupled using a conductor.