A package structure is provided. The package structure includes a first conductive pad in an insulating layer, a first under bump metallurgy structure under the first insulating layer, and a first conductive via in the insulating layer. The first conductive via is vertically connected to the first conductive pad and the first under bump metallurgy structure. In a plan view, a first area of the first under bump metallurgy structure is confined within a second area of the first conductive pad.

Embodiments are generally directed to module installation on printed circuit boards with embedded trace technology. An embodiment of a printed circuit board includes one or more layers including a top layer; multiple embedded traces that are contained in an area of a surface of a first layer of the one or more layers of the printed circuit board; and a first module, the first module being installed on the plurality of printed traces in the area.

An electronics package is disclosed. The electronics package includes a first radio frequency (RF) substrate layer, a second RF substrate layer, and a plurality of conductive layers disposed adjacent to at least one of the first RF substrate layer and the second RF substrate layer and including an inner conductive layer disposed between and adjacent to both the first RF substrate layer and the second RF substrate layer. The inner conductive layer bonds the first RF substrate layer to the second RF substrate layer. The electronics package also includes a plurality of conductive interconnects extending through the first RF substrate layer and the second RF substrate layer and electrically coupled between at least two of the plurality of conductive layers.

A flexible circuit board includes a flexible substrate, an electronic component and a heat spreader. The electronic component and the heat spreader are disposed on a top surface and a bottom surface of the flexible substrate, respectively. The heat spreader includes a copper layer which contains more than or equal to 50% copper grains by volume with (1,0,0) crystallographic orientation.

Panels of LED arrays and LED lighting systems are described. A panel includes a substrate having a top and a bottom surface. Multiple backplanes are embedded in the substrate, each having a top and a bottom surface. Multiple first electrically conductive structures extend at least from the top surface of each of the backplanes to the top surface of the substrate. Each of multiple LED arrays is electrically coupled to at least some of the first conductive structures. Multiple second conductive structures extend from each of the backplanes to at least the bottom surface of the substrate. At least some of the second electrically conductive structures are coupled to at least some of the first electrically conductive structures via the backplane. A thermal conductive structure is in contact with the bottom surface of each of the backplanes and extends to at least the bottom surface of the substrate.

A connection method for a chip and a circuit board includes: placing the circuit board on the chip, the circuit board having a first surface in contact with the chip having a plurality of contacts, and the circuit board having a plurality of through holes aligned with the plurality of contacts respectively; placing a mask on a second surface of the circuit board, the mask having a plurality of openings aligned with the plurality of through holes respectively; covering a surface of the mask with a conductive adhesive to fill the plurality of through holes with the conductive adhesive; and keeping portions of the conductive adhesive that are respectively in the plurality of through holes to be spaced apart from each other. The portions of the conductive adhesive that fill the plurality of through holes remain to provide an electrical connection between the circuit board and the chip.

Disclosed are a device and techniques for fabricating the device. The device may include a top substrate including a plurality of top vias coupled to a first top metal layer that forms a top winding portion of a first inductor. The device also includes a middle substrate including one or more middle metal layers. The top substrate is disposed on the middle substrate. The one or more middle metal layers form a middle winding portion of the first inductor. The device also includes a bottom substrate electrically coupled to the middle substrate opposite the top substrate, where a first bottom metal layer of the bottom substrate forms a bottom winding portion of the first inductor.

A method is provided for forming waveguides in a PCB. The method may include forming an opening in a PCB core comprising a plurality of conductive layers interleaved with a plurality of insulating layers, the opening extending from a first side of the PCB core to a second side of the PCB core. The method may also include filling the opening with metal. The method may also include forming a cavity enclosed by sidewalls by removing a first portion of the filled opening, the cavity extending from the first side of the PCB core to the second side of the PCB core. A second portion of the filled opening is a heat transfer element configured to transfer heat from the first side of the PCB core to the second side of the PCB core. The at least one waveguide is embedded within the heat transfer element and configured for transmitting signals from the first side to the second side.

A method and system for heat bonding a chip to a substrate by means of heat bonding material disposed there between. At least the substrate is preheated from an initial temperature to an elevated temperature below a damage temperature of the substrate. A light pulse applied to the chip momentarily increases the chip temperature to a pulsed peak temperature below a peak damage temperature of the chip. The momentarily increased pulsed peak temperature of the chip causes a flow of conducted heat from the chip to the bonding material, causing the bonding material to form a bond.

A wiring substrate includes an insulating layer, a pad in a via hole piercing through the insulating layer and exposed at a first surface of the insulating layer, a via conductor on the pad in the via hole, and a wiring part on a second surface of the insulating layer facing away from the first surface. The wiring part is connected to the pad through the via conductor in the via hole.