Abstract:
A circuit board is provided for improving signal quality, including a signal plane for a plurality of signal traces arranged thereon and a ground plane formed by a plurality of tiles connected to each other in an array. Each tile is formed by ground traces. Different line segments of a signal trace mapped on the ground plane cross ground traces of the tiles at similar angles, thereby minimizing interaction between the ground traces and the signal traces to reduce differences in impedances of the signal traces.
Abstract:
A printed circuit board has a substrate formed of an insulator, a strip line provided on a front surface of the substrate, and a ground metal layer provided on a rear surface of the substrate. An opening is provided in the ground metal layer to reach the substrate. A radio wave receiving converter and an antenna device each include the printed circuit board.
Abstract:
Fundamental interconnect systems for connecting high-speed electronics elements are provided. Interconnect system has the means, which could reduce the microwave loss by reducing the effective dielectric loss and dielectric constant of the interconnect system, and increase the bandwidth of the interconnects and also reduce the signal propagation delay, respectively. Ideally, the speed of the electrical signal on the signal line can be reached to speed of the light in the air, and the bandwidth can be reached to closer to the optical fiber. The interconnect systems consists of the signal line, dielectric system with opened trench or slot filled up with the air or lower dielectric loss material, and the ground plan. The signal line proposed in this invention could be made any type of signal line configuration for example, microstripline, strip line or coplanar line. The signal line can also be made as single ended or differential pairs of any configurations. The interconnect system based on the fundamental techniques provided in this invention, can be used for on-chip interconnects where the high speed electronics devices are connected by the signal line laid on the oxide or dielectric material. Again, the interconnect system based on the fundamental techniques provided in this invention, can also be used for off-chip interconnects (chip-to-chip interconnects), where the whole portion or portion of the PCB on which high speed chips are to be connected, are having the dielectric system with opened trench or slot to reduce the microwave loss. High scale chip-to-chip interconnection using of the multilayered PCB is possible. The fundamental techniques provided in this invention can also be used for high-speed connectors and high-speed cables. The main advantages of this invention are to make high speed interconnects systems for on-chip and off-chip interconnects. More over, this fundamental technology is also used for the high sped die package, high speed connector, and high speed cables where conventional manufacturing technology can be used and yet to increase the bandwidth of the interconnects.
Abstract:
Circuit board assemblies and methods that employ integrated heatspreaders to cool the assemblies and serve as electrical ground planes for the assemblies. Such a circuit board assembly includes a substrate having at least one circuit device on at least a first surface thereof and an electrical ground plane. The circuit device has a first set of solder connections electrically connected to the electrical ground plane and a second set of solder connections electrically connected to power and signal traces on the first surface of the substrate. The assembly further includes a heatspreader embedded in the substrate and defining an electrical element of the electrical ground plane as a result of being electrically connected to the first set of solder connections. The heatspreader is configured as a plate-mesh-plate laminate that defines a cavity containing a fluid for transferring heat from the circuit device.
Abstract:
A semiconductor-embedded substrate device according to the present invention can relax a thermal stress during fabrication or use and therefore has sufficient heat radiation properties and reliability. A semiconductor-embedded substrate (100) is a multilayer substrate obtained by stacking resin layers and has, inside of the resin layer (2), a semiconductor device (30) having a bump (32) connected to a terminal electrode (11) via an internal wiring (13) and connection plug (12). A heat radiation member (20) having an opening P in which one or more openings H have been formed is arranged immediately above and opposite to the back surface (30b) of the semiconductor device (30) and heat generated therein is transferred to and released from the heat radiation member (20).
Abstract:
A display device includes a display panel provided with an electrode pad, a light source to emit light to the display panel, a mold frame to support the light source; a bottom chassis to accommodate the mold frame, a driving part to apply a driving signal to the display panel connected to the electrode pad, and a driving circuit part that controls the driving part. The driving circuit part includes a first driving circuit board connected to the driving part and on which circuit components are mounted toward the mold frame, and a second driving circuit board connected to the first driving circuit board. The display device further includes a flexible circuit board to connect the first driving circuit board and the second driving circuit board.
Abstract:
The present disclosure is generally directed to illumination devices, and methods for making the same. The device, in particular, includes a first conductor layer, a first insulator layer disposed on the first conductor layer and having at least one first aperture defined therein through the first insulator layer, a second conductor layer disposed on the first insulator layer and having at least one second aperture defined therein through the second conductor layer and positioned to align with the at least one first aperture, and a light manipulation layer disposed on the second conductor layer and having at least one pair of apertures defined therein through the light manipulation layer including a third aperture and a fourth aperture, where the third aperture is positioned to align with the at least one second and first apertures.
Abstract:
A method and structures with an EMI shielding electrically conductive coating are provided for implementing EMI shielding for rigid cards and flexible circuits. An EMI shielding electrically conductive coating is deposited on an outer layer, for example, using a vacuum sputtering deposition, chemical vapor deposition (CVD) or physical vapor deposition (PVD) process. A solder mask is applied. Mechanically cleaning removes the sputtered copper coating in areas of the outer layer that are not protected by the solder mask.
Abstract:
A capacitive structure and technique for allowing near-instantaneous charge transport and reliable, wide-band RF ground paths in integrated circuit devices such as integrated circuit dies, integrated circuit packages, printed circuit boards, and electronic circuit substrates is presented. Methods for introducing resistive loss, dielectric loss, magnetic loss, and/or radiation loss in a signal absorption ring implemented around a non-absorptive area of one or more conductive layers of an integrated circuit structure to dampen laterally flowing Electro-Magnetic (EM) waves between electrically adjacent conductive layers of the device are also presented.
Abstract:
In a printed circuit board and its heat dissipating metal surface layout, a layer of copper foil is coated onto the printed circuit board for dissipating heat, and the surface of the copper foil is covered by an insulating coating, and a bare copper is formed on the surface of copper foil which is not covered by the insulating coating, and the bare copper is arranged in a cross shape, or in the shape of “#”, so that when the printed circuit board goes through a soldering furnace, the cohesion of solder is even instead of aggregating at a same position or the center, so as to obtain a larger protruding area and facilitate dissipating heat and transmitting current.