Abstract:
The coating agent of the invention is a coating agent to be used between conductor members, comprising a thermosetting resin, a white pigment, a curing agent and a curing catalyst, the coating agent to be used between conductor members having a white pigment content of 10-85 vol % based on the total solid volume of the coating agent, and a whiteness of at least 75 when the cured product of the coating agent has been allowed to stand at 200° C. for 24 hours.
Abstract:
An LED wiring board includes an insulator layer, a conductor layer (a wiring pattern layer) formed on the insulator layer, and a white reflective film which is formed on the insulator layer and which includes a white colorant and a binder thereof. The conductor layer includes a first wiring pattern and a second wiring pattern, and the white reflective film has a portion which is between the first wiring pattern and the second wiring pattern and which is thinner than both of the first wiring pattern and the second wiring pattern.
Abstract:
Systems and methods for simultaneously partitioning a plurality of via structures into electrically isolated portions by using plating resist within a PCB stackup are disclosed. Such via structures are made by selectively depositing plating resist in one or more locations in a sub-composite structure. A plurality of sub-composite structures with plating resist deposited in varying locations are laminated to form a PCB stackup of a desired PCB design. Through-holes are drilled through the PCB stackup through conductive layers, dielectric layers and through the plating resist. Thus, the PCB panel has multiple through-holes that can then be plated simultaneously by placing the PCB panel into a seed bath, followed by immersion in an electroless copper bath. Such partitioned vias increase wiring density and limit stub formation in via structures. Such partitioned vias allow a plurality of electrical signals to traverse each electrically isolated portion without interference from each other.
Abstract:
A layer or layers for use in package substrates and die spacers are described. The layer or layers include a plurality of ceramic wells lying within a plane and separated by metallic vias. Recesses within the ceramic wells are occupied by a dielectric filler material.
Abstract:
A printed circuit board (PCB) and a semiconductor package that are configured to prevent delamination and voids. In one example embodiment, the semiconductor package includes a PCB having a base substrate on which conductive patterns are formed and which includes an interior region having a die paddle for receiving a semiconductor chip and an exterior region disposed outside the interior region. The PCB also includes a first solder resist formed on a portion of the base substrate corresponding to the interior region and a second solder resist formed on a portion of the base substrate corresponding to the exterior region. The second solder resist may also have a greater surface roughness than the surface roughness of the first solder resist.
Abstract:
A metal layer 18 is sandwiched between insulating layers 14 and 20 so that required strength is maintained. Hence it follows that the thickness of a core substrate 30 can be reduced and, therefore, the thickness of a multi-layer printed circuit board can be reduced. Formation of non-penetrating openings 22 which reach the metal layer 18 in the insulating layers 14 and 20 is simply required. Therefore, small non-penetrating openings 22 can easily be formed by applying laser beams. Thus, through holes 36 each having a small diameter can be formed.
Abstract:
Disclosed is a printed circuit board including an electromagnetic bandgap structure. The electromagnetic bandgap structure, which includes a first dielectric material for interlayer insulation and is for blocking a noise, is inserted into the printed circuit board. The electromagnetic bandgap structure can include a first conductive plate, a second conductive plate arranged on a planar surface that is different from that of the first conductive plate, a third conductive plate arranged on a same planar surface as the first conductive plate, and a stitching via unit configured to connect the first conductive plate and the third conductive plate through the planar surface on which the second conductive plate is arranged. A second dielectric material having a permittivity that is different from that of the first dielectric material is interposed between any two of the first conductive plate, the second conductive plate, and the third conductive plate.
Abstract:
A method for forming a wire bonding substrate is disclosed. A substrate comprising a first surface and a second surface is provided. A through hole is formed in the substrate. A conductive layer is formed on the first surface and the second surface of the substrate and covers a sidewall of the through hole. The conductive layer on the first surface of the substrate is patterned to form at least a first conductive pad, and the conductive layer on the second surface of the substrate is patterned to form at least a second conductive pad. An insulating layer is formed on the first surface and the second surface of the substrate and covers the first conductive pad and the second conductive pad. The insulating layer is recessed until top surfaces of the first conductive pad and the second conductive pad are exposed. A first metal layer is electroplated on the first conductive pad by applying current from the second conductive pad to the first conductive pad through the conductive layer passing the through hole.
Abstract:
A new SMD (surface mount devices) package design for efficiently removing heat from LED Chip(s) is involved in this invention. Different from the regular SMD package, which electrical isolated materials like Alumina or AlN are used, the substrate material here is metal like Copper, Aluminum and so on. Also, different from regular design, which most time only has one LED chip inside, current design will at least have two or more LED chips (or chip groups) in one package. All chips are electrical connected via metal blocks, traces or wire-bond. This type of structure is generally fabricated via chemical etching and then filled with dielectric material inside to form a strong package. Because the thermal conductivity of the metal is much higher than the ceramics, the package thermal resistance is much lower than the ceramics based package. Also, the cost of the package is much lower than ceramics package. Moreover, emitting area in one package is much larger than the current arts.
Abstract:
An article comprises first and second electrically responsive elements having a cutting plane which is perpendicular to an x-dimension for separating the elements. The conductive elements of the conductive layers are alternatingly exposed to one of the two opposing faces of the conductive element.