Abstract:
Provided herein are devices comprising a printed wiring board that comprise, singulated capacitors fabricated from known good, thin-film, fired-on-foil capacitors. Provided are methods of incorporating the singulated capacitors into the build-up layers of a printed wiring board to minimize impedance. The singulated capacitors have a pitch that allows each power and ground terminal of an IC to be directly connected to a power and ground electrode, respectively, of its own singulated capacitor. Using a feedstock of known good, fired-on-foil capacitors allows for improved PWB yield.
Abstract:
There is disclosed a method, system, and screen for reducing solder voids on circuit boards. In an embodiment, there is provided a method of reducing solder voids on a circuit board, comprising: locating via holes provided at a conductive landing pad; and covering at least some of the via holes with a coating, whereby gases from the covered via holes are prevented from expanding and forming voids. In another embodiment, the method further comprises covering the location of at least some of the via holes in a pattern of strips, whereby more of the via holes may be covered by the coating while reducing areas of the conductive landing pad covered by the coating. In another embodiment, the coating and removal process may be performed at the same time as when all other areas of the circuit board are coated and removed, such that a separate manufacturing step is not required.
Abstract:
There is provided a circuit board including a first and a second circuit substrate located with a spacing, on which a first and a second conductor pad are provided respectively; and a connection substrate including a first and a second conductor post projecting from one or the other side; the connection substrate being disposed so as to cover a portion of the first and the second circuit substrate, and bridged therebetween; the first conductor post and the first conductor pad, as well as the second conductor post and the second conductor pad, being disposed so as to oppose each other; the circuit board also including a connector portion to be formed upon melting a metal coating layer, formed in advance on a surface of at least one of the first conductor post and the first conductor pad, and on a surface of at least one of the second conductor post and the second conductor pad; the first and the second circuit substrate and the connection substrate being electrically connected through the connector portion.
Abstract:
[PROBLEMS] To promote thinning of a surface illuminator while realizing higher and more uniform luminance by dissipating heat from a point light source more efficiently. [MEANS FOR SOLVING PROBLEMS] A heat dissipation path is constituted to transmit heat generated from a point light source (3) to a metallic heat dissipation plate (5a) through an electrode terminal (3a) of the point light source (3), a land portion (12) on the front surface (10F) of an FPC (10), a through hole (16) of a conductor pattern (14) and a high heat conduction resin (18). The path for efficiently dissipating heat from the conductor pattern (14) of the FPC (10) to the metallic heat dissipation plate (5a) is widened and a direct heat dissipation area is also secured sufficiently. Especially, even when a large current LED is employed in the point light source (3), sufficient heat dissipation effect can be attained. Since the degree of freedom of the wiring pattern and outline of the FPC (10) is not different from that of conventional FPCs, the request for thinning the surface illuminator can be met sufficiently.
Abstract:
By use of a simple structure, also without enlarging thickness and size too much, provided is a light emitting module which can improve heat dissipation of a light emitting component. On a surface of a wiring substrate, a pair of lands face to each other, and two wiring line is connected to the land, respectively. A mounting side outside electrode of a light emitting component is connected to a lead frame to which a light emitting element is die-bonded, and a non-mounting side outside electrode is connected to a lead frame which is connected to the light emitting element through a bonding wire. And, the mounting side outside electrode is bonded to the land by solder, and the non-mounting side outside electrode is bonded to the land by solder and thereby, the light emitting component is mounted on the wiring substrate. A line width of the wiring line at a side to which the mounting side outside electrode of the light emitting component is soldered is made to be larger than a line width of the wiring line at a side to which the non-mounting side outside electrode is soldered.
Abstract:
Bei einer elektrischen Schaltung mit einer Mehrlagen-Leiterplatte und einem gegen elektro-magnetische Störungen abschirmenden Gehäuse (14,15) sind Teile mindestens einer äußeren Lage (1) als Kontaktfläche (6) ausgebildet, die mit jeweils einer Leiterfläche (10) auf einer weiteren Lage (2,3) kontaktiert sind, die einen gegenüber der Kontaktfläche (6) versetzten Flächenbereich einnimmt und mit einer gegenüber liegenden Massefläche (5) der äußeren Lage (1) einen Durchführungskondensator bildet.
Abstract:
Disclosed herein are a sheet-like connector that electrode structures each having a front-surface electrode part small in diameter can be formed, a stable electrically connected state can be surely achieved even to a circuit device, on which electrodes have been formed at a small pitch, and the electrode structures are prevented from falling off from an insulating sheet to achieve high durability, and a production process and applications thereof. The sheet-like connector of the invention has an insulating sheet and a plurality of electrode structures arranged in the insulating sheet and extending through in a thickness-wise direction of the insulating sheet. Each of the electrode structures is composed of a front-surface electrode part exposed to a front surfaces of the insulating sheet and projected from the front surface of the insulating sheet, a back-surface electrode part exposed to a back surface of the insulating sheet, a short circuit part continuously extending from the base end of the front-surface electrode part through the insulating sheet in the thickness-wise direction thereof and linked to the back-surface electrode part, and a holding part continuously extending from a base end portion of the front-surface electrode part outward along the front surface of the insulating sheet.
Abstract:
By use of a simple structure, also without enlarging thickness and size too much, provided is a light emitting module which can improve heat dissipation of a light emitting component. On a surface of a wiring substrate, a pair of lands face to each other, and two wiring line is connected to the land, respectively. A mounting side outside electrode of a light emitting component is connected to a lead frame to which a light emitting element is die-bonded, and a non-mounting side outside electrode is connected to a lead frame which is connected to the light emitting element through a bonding wire. And, the mounting side outside electrode is bonded to the land by solder, and the non-mounting side outside electrode is bonded to the land by solder and thereby, the light emitting component is mounted on the wiring substrate. A line width of the wiring line at a side to which the mounting side outside electrode of the light emitting component is soldered is made to be larger than a line width of the wiring line at a side to which the non-mounting side outside electrode is soldered.