Abstract:
A ball grid array integrated circuit package which has a plurality of elliptical shaped solder pads located on a substrate of the package. Routing traces are connected to the apexes of the elliptical shaped solder pads. Connecting a routing trace to the apex of an elliptical shaped solder pad reduces the stress points on the trace/pad interface. Vias may be coupled to the solder pads and the routing traces. The vias are located at the apexes of the elliptical shaped solder pads to reduce the stress points of the substrate.
Abstract:
A heat transfer apparatus is carried on a substrate (204) having top and bottom surfaces (212, 214). The heat transfer apparatus includes a pad (220/222), at least one via (224/226), and a plurality of pads (302). The pad (220/222) is carried on the top surface (212) of the substrate (204) to electrically connect to an electronic component (228/230). The via (224/226) intersects the pad (220/222) and extends between the top and bottom surfaces (212, 214) of the substrate (204). The plurality of pads (302) are carried on the bottom surface (214) of the substrate (204) beneath the pad (220/222). The via (224/226) intersects one of the plurality of pads (302) to transfer heat generated during operation of the electronic component (228/230) thereto.
Abstract:
A method and an apparatus align and attach a leadless surface mount component (402) including a termination at each end of the component (402). The termination has bottom (704) and end (702) portions for attaching to a corresponding pad on a substrate (102) by a reflow solder process (1200). A pad arrangement (100) is formed including two opposite pads (108), each pad (108) occupying a tri-oval-shaped area. The tri-oval-shaped area includes an elliptical area (110) substantially centered under the bottom portion (704) of the corresponding termination of the component (402) when the component (402) is aligned with the pad arrangement (100), and an arcuate area (112) contiguous with the elliptical area (110) and extending towards the opposite pad (108) in a central lengthwise direction. A solder paste (202) is applied to the elliptical area (110), and thereafter reflowed, whereby solder (302) in the solder paste (202) liquefies and flows onto the arcuate area (112), thereby facilitating alignment of the component (402) with the pad arrangement (100).
Abstract:
An electrical connecting arrangement is provided between an electrical edge connector and a printed circuit board in which contact pads provided near the edge of the printed circuit board have a convex profile at least in the direction of insertion of the board into an opening in the edge connector. At full board insertion, each spring contact (3, FIG. 1A) of the connector engages a board contact pad (5) at a location (64) on the pad that lies beyond the center (66) of the pad.
Abstract:
Solder pads for surface mounting of devices on a circuit board are given predetermined shapes. By shaping of a solder pad, or contact pad, a device will be held in, or moved to, a desired position on melting of the solder at the pad. Improved alignment and positioning is obtained. Broadly, a contact or solder pad comprises a rectangular portion and a segmental portion, the device end resting on the rectangular portion and the segmental portion being outside of the contact position.
Abstract:
An electronic system is provided. The electronic system includes a base and a semiconductor device. The base having a device-attach region includes a build-up layer structure, a vertical interconnect structure and a first through via. The vertical interconnect structure and the first through via are formed passing through the build-up layer structure and located in the device-attach region. The vertical interconnect structure includes a buried via and a blind via electrically coupled to the buried via. The first through via is a straight through via. The semiconductor device is mounted on the device-attach region of the base.
Abstract:
A manufacturing method of a circuit board including an annular land portion around a through hole through which a terminal that is an object of a soldering penetrates, and that is soldered on the land portion by a soldering process with a solder supply, the manufacturing method includes: previously forming a preliminary solder at a position opposite to a supply position of the solder in the land portion with respect to the through hole before the soldering process.
Abstract:
An electronic device includes a housing; a printed circuit board provided in the housing and including a fastening hole; a pad structure provided on the printed circuit board, the pad structure including: a first pad surrounding at least a portion of the fastening hole; a second pad spaced apart from the first pad in a first direction; and a third pad spaced apart from the first pad in a second direction that is different from the first direction with respect to the fastening hole; a first electronic component provided on the printed circuit board and electrically connected to the second pad; and a metal plate including: a first plate area provided on the first pad; and a second plate area extending from the first plate area and provided on one of the second pad and the third pad.
Abstract:
Embodiments of the present disclosure may relate to a printed circuit board (PCB) that includes a first outer layer and a second outer layer opposite the first outer layer. The PCB may further include a routing layer between the first outer layer and the second outer layer, and an interconnect positioned within the first outer layer and coupled with the routing layer. The interconnect may include a contact within an opening in the first outer layer, wherein the contact is within a plane defined by an outer surface of the first outer layer. The interconnect may further include a plated via directly coupled with the contact and the routing layer. Other embodiments may be described or claimed.
Abstract:
A switch component includes a spring plate and a cover of rubber. The cover of rubber covers at least one part of an upper surface of the spring plate. The cover of rubber includes at least one pair of supporting portions that support the spring plate.