Abstract:
Electrical components such as integrated circuits may be mounted on a printed circuit board. To prevent the electrical components from being subjected to electromagnetic interference, radio-frequency shielding structures may be formed over the components. The radio-frequency shielding structures may be formed from a layer of metallic paint. Components may be covered by a layer of dielectric. Channels may be formed in the dielectric between blocks of circuitry. The metallic paint may be used to coat the surfaces of the dielectric and to fill the channels. Openings may be formed in the surface of the metallic paint to separate radio-frequency shields from each other. Conductive traces on the surface of the printed circuit board may be used in connecting the metallic paint layer to internal printed circuit board traces.
Abstract:
Stacked arrays of components are disclosed. In one embodiment, a first and a second layer of components are electrically and mechanically coupled to an interposer with an encapsulated third layer of components disposed between the first and second layers. The first layer can be configured to attach the stacked array to a host printed circuit board. The interposer can couple signals between the components on the first and second layers.
Abstract:
Electrical components such as integrated circuits may be mounted on a printed circuit board. To prevent the electrical components from being subjected to electromagnetic interference, radio-frequency shielding structures may be formed over the components. The radio-frequency shielding structures may be formed from a layer of metallic paint. Components may be covered by a layer of dielectric. Channels may be formed in the dielectric between blocks of circuitry. The metallic paint may be used to coat the surfaces of the dielectric and to fill the channels. Openings may be formed in the surface of the metallic paint to separate radio-frequency shields from each other. Conductive traces on the surface of the printed circuit board may be used in connecting the metallic paint layer to internal printed circuit board traces.
Abstract:
Stacked arrays of components are disclosed. In one embodiment, a first and a second layer of components are electrically and mechanically coupled to a thin interposer disposed between the first and second layers. The first layer can be configured to attach the stacked array to a host printed circuit board. The interposer can insulate the components from one another and also couple signals between the components on the first and second layers. In one embodiment, the components in the first and second layers are passive components.
Abstract:
Stacked arrays of components are disclosed. In one embodiment, a first and a second layer of components are electrically and mechanically coupled to an interposer with an encapsulated third layer of components disposed between the first and second layers. The first layer can be configured to attach the stacked array to a host printed circuit board. The interposer can couple signals between the components on the first and second layers.
Abstract:
A printed circuit board may have patterned traces. Components may be mounted to the printed circuit board using solder. Solder paste may be printed onto the printed circuit board using a stencil. Following reflow operations, the solder paste may form solder bumps that connect component leads to traces on the printed circuit board. Misalignment between the mounted components and printed circuit board traces can be minimized by forming fiducials from solder paste. During the process of printing solder paste patterns on the printed circuit board, solder paste printing equipment may form the solder paste fiducials. Component mounting equipment may use cameras or other imaging equipment to gather information on the location of the solder paste fiducials. The component mounting equipment may then mount the components on the printed circuit using the information on the location of the solder paste fiducials.
Abstract:
Stacked arrays of components are disclosed. In one embodiment, a first and a second layer of components are electrically and mechanically coupled to a thin interposer disposed between the first and second layers. The first layer can be configured to attach the stacked array to a host printed circuit board. The interposer can insulate the components from one another and also couple signals between the components on the first and second layers. In one embodiment, the components in the first and second layers are passive components.
Abstract:
The described embodiment relates generally to the field of PCB fabrication. More specifically conductive spheres are used in a bonding sheet to enable inter-layer communication in a multi-layer printed circuit board (PCB). The conductive spheres in the bonding sheet can be used in place of or in conjunction with conventional electroplated vias. This allows the following advantages in multi-layer PCB fabrication: dielectric substrate layers made of varying types of material; PCBs with higher resilience to stress and shock; and PCBs that are more flexible.
Abstract:
An electronic device may be provided with antenna structures. Circuitry such as radio-frequency transceiver circuitry and impedance matching and filter circuitry may be implemented using one or more circuit components and embedded within an insulator to form packaged circuitry. The insulator may be formed from multiple layers of printed circuit board material or from plastic molded onto a printed circuit board substrate over the circuitry. A metal shield layer may be interposed between the packaged circuitry and the antenna structures. The metal shield layer may be mounted on the surface of the packaged circuitry using a layer of adhesive. A layer of polymer may be interposed between the layer of adhesive and the metal shielding layer. The metal shield layer may have an opening through which conductive paths may pass to couple the packaged circuitry to antenna terminals on the antenna structures.
Abstract:
An electronic device may be provided with antenna structures. Circuitry such as radio-frequency transceiver circuitry and impedance matching and filter circuitry may be implemented using one or more circuit components and embedded within an insulator to form packaged circuitry. The insulator may be formed from multiple layers of printed circuit board material or from plastic molded onto a printed circuit board substrate over the circuitry. A metal shield layer may be interposed between the packaged circuitry and the antenna structures. The metal shield layer may be mounted on the surface of the packaged circuitry using a layer of adhesive. A layer of polymer may be interposed between the layer of adhesive and the metal shielding layer. The metal shield layer may have an opening through which conductive paths may pass to couple the packaged circuitry to antenna terminals on the antenna structures.