Abstract:
An electronic package which includes first and second circuitized substrates secured together by a solder member which includes a first contact portion for attachment to a printed circuit board and a second contact portion used to bond the two substrates together (e.g., to form a multi-chip module). Semiconductor chips can be positioned on and electrically coupled to the formed solder members.
Abstract:
An I-channel surface mount connector includes a length of cylindrical rod having a generally I-shaped cross section is improved by providing an extended mounting flange. When a first circuit device is connected to a second circuit device with the extended flange extending outward of the first device, the flange can extend beyond the periphery of the first device. This extension has the advantage that the solder bond between the flange and the second device can be easily inspected from above using visual inspection equipment.
Abstract:
A wiring substrate 7 is attached by pressure to a substrate overhang with an ACF 6b, and substrate terminals 21 formed on the substrate overhang 2c from ITO and the first terminals 21 formed on the rear surface of wiring substrate 7 are electrically connected. The wiring substrate 7 has second terminals 27 on its surface and these second terminals 27 are electrically connected to the first terminals located on the rear surface via a throughhole. The wiring pattern on the wiring substrate 7 is formed from a material with an electric resistance lower than that of the ITO forming the substrate terminals 21, which makes it possible to hold the resistance of the wiring on the substrate overhang 2c to a low value.
Abstract:
A module of a combination card can be incorporated into a card body with solder being easily melted, and heat transmission to portions other than the antenna connection terminals is reduced. A card body is provided with an antenna. The module includes a substrate which has a terminal surface on which at least one external connection terminal is formed and a mounting surface opposite to the terminal surface. An IC chip is mounted on the mounting surface. The module includes at least one antenna connection terminal located on the mounting surface. The antenna connection terminal is connected to the antenna, and at least a part of the antenna connection terminal is exposed on the terminal surface.
Abstract:
An inter-substrate conductive mount for a surface mountable circuit board, a method of manufacturing the circuit board and a surface mountable power magnetic device. In one embodiment, the circuit board includes: (1) a substrate, (2) an inter-substrate conductive mount composed of a material having a melting point above a solder reflow temperature and including a compliant solder joint at an interface of the substrate and (3) a solder located proximate the conductive mount, the conductive mount of a sufficiently low weight such that a surface tension of a liquid state of the solder is sufficient to maintain the conductive mount in contact with the substrate as the solder is brought to the reflow temperature, the conductive mount being capable of mounting the substrate to an adjacent substrate and providing a conductive path therebetween.
Abstract:
An electronic package which includes first and second circuitized substrates secured together by a solder member which includes a first contact portion for attachment to a printed circuit board and a second contact portion used to bond the two substrates together (e.g., to form a multi-chip module). Semiconductor chips can be positioned on and electrically coupled to the formed solder members.
Abstract:
An interconnect for connecting two printed circuit boards (30, 32) directly together and a method for achieving same. A through hole (70) is formed in a first printed circuit board (30), which is surrounded by a conductive layer (62). A conductive layer (82) is also deposited on a second printed circuit board (32) opposite the through hole (70). The conductive layers (62, 82) allow for the conduction of electrical signals between and about the two printed circuit boards (30, 32). In the preferred embodiment, the conductive layer (62, 82) is copper metalization and the through hole (70) is plated with copper. A solder joint (58) is applied to fill the through hole (70) and establish electrical connection between the conductive layers (62, 82) on the two printed circuit boards (30, 32). Electrical connection is established by applying the solder joint (58) to and between the conductive layers (62, 82) on both boards (30, 32). In an alternative embodiment using a non-plated through hole (70), the interconnect is achieved by either repetitious localized impact, induced vibration or ultrasonic vibration applied to the solder joint (58) after the solder (56) is deposited.
Abstract:
A ball-grid array connector structure for an electronic package in which the ball pitch can be reduced to increase the packaging density has a plastic substrate having at least one hollow through-hole and an electrode covering the wall of the through-hole and forming an electrode pad surrounding the through-hole on each surface of the substrate. A metallic ball is joined, either directly or through a solder or a combination of a metallic bump and a solder, to the electrode pad on at least one surface of the substrate at the position of the through-hole. The connector structure can be formed either by sealing an open end of the through-hole on the side to which the ball is not joined, or increasing the pressure within the through-hole by a pressure-control mechanism, before the through-hole is blocked by reflowing the ball itself or the metallic bump or solder used to connect the ball.
Abstract:
The specification describes techniques for attaching double sided circuit boards having plated through holes to interconnection substrates using solder bump arrays. The through holes are filled with a high melting point solder which allows solder bumps to be located directly on the through hole thus saving board area and reducing the interconnection length.
Abstract:
A die-up configuration includes a rigid circuit board with electrically conductive plated-through holes formed therethrough and an integrated-circuit die mounted to the upper surface of which a flexible insulated tape layer is fixed to the upper surface of a rigid circuit board and which has a number of wire-bonding sites. Conductive vias or plated-through holes are provided for connecting the wire-bonding sites on the upper surface of the flexible insulated tape layer to the contact areas formed on the lower surface of the flexible insulated tape layer. Conductors are provided for connecting respective contact areas on the lower surface of the flexible insulated tape layer to solder balls on the bottom of the rigid circuit board.