Abstract:
A mechanism and method are provided for assembling a printed circuit board having a first surface, a second surface and an edge. The printed circuit board may include at least one female member to receive a corresponding male member. The mechanism may include an extension board having an edge to couple to the edge of the printed circuit board. The extension board may include a male member to extend from the edge of the extension board and to couple to the at least one male member so as to couple the extension board to the printed circuit board.
Abstract:
A system comprising a scavenging blade, a printed wiring board receiving portion, and a movement mechanism adapted to move the scavenging blade and printed wiring board receiving portion relative to each other, and to a method of removing excess fill material comprising providing a printed wiring board having filled holes and at least some excess fill material on a surface of the printed wiring board, providing a system comprising a scavenging blade, positioning the printed wiring board in the system, and causing the scavenging blade to traverse at least a portion of the printed wiring board in a manner that causes the scavenging blade to remove at least a portion of the excess fill material from the printed wiring board.
Abstract:
The invention provides a method of plating an integrated circuit. An activation plate is positioned adjacent to at least one integrated circuit. The integrated circuit includes a plurality of bond pads comprising a bond-pad metal, and the activation plate also comprises the bond-pad metal. A layer of electroless nickel is plated on the bond pads and the activation plate, and a layer of gold is plated over the layer of electroless nickel on the bond pads and the activation plate. An integrated circuit with bond pads plated using the activation plate, and a system for plating an integrated circuit is also disclosed.
Abstract:
A mechanism and method are provided for assembling a printed circuit board having a first surface, a second surface and an edge. The printed circuit board may include at least one female member to receive a corresponding male member. The mechanism may include an extension board having an edge to couple to the edge of the printed circuit board. The extension board may include a male member to extend from the edge of the extension board and to couple to the at least one male member so as to couple the extension board to the printed circuit board.
Abstract:
A filling system includes a pressurized source of fill material and a pressure fill head wherein the fill head also includes a heating element positioned so as to transfer heat to fill material passing through the fill head. A method of filling holes using a fill material passing through a pressure fill head includes the steps of causing fill material to enter the fill head, modifying the viscosity of the fill material while it is within the fill head, and causing the modified viscosity fill material to exit the fill head and enter at least one hole.
Abstract:
An electrical system includes a printed circuit board with conductive traces formed thereon. An electrical connector includes an insulative base with an array of cells defined therein. Each cell receives and retains a conductive contact having a tail portion corresponding to the conductive traces. Soldering pre-forms are arranged between the conductive traces and the tail portions. A heat distributor includes a thermally conductive base plate positioned on the connector base and thermally conductive pins extending from the base plate. The base plate is positioned on the connector base with the pins inserted into the cells and thermally engaging selected contacts so as to create a homogenous heat transfer to/from the soldering pre-forms thereby eliminating heat stress among the soldering pre-forms
Abstract:
Disclosed is a foolproof polarity indication of poled electronics parts or devices to be given to a printed circuit board to assure that poled electronics parts and/or devices be correctly mounted in respect of their polarities to meet occasional requirements dependent on different specifications. Each pair of terminal holes are allotted to a given poled electronics part or device. Two symbols representative of such electronics part or device are arranged side by side on either side of the line drawn from one to the other terminal hole. The poled electronics part or device symbols are of reversed polarities. This dual symbol arrangement is effective to draw workers' attention in mounting electrode components in terms of their polarities. When extra components or dummy ones are combined with such a poled component, they are encircled by a boundary line, thereby showing the correct polarity direction of the poled component in respect of whether it is enclosed or not.
Abstract:
A ball grid array unit suitable for calibrating an inspection system, comprising a substrate and an array of balls mounted on a surface of the substrate, the balls having a melting point greater than 400 degrees centigrade or a Britnell hardness number greater than 150.
Abstract:
A printed wiring board device includes circuit parts which are mounted on a wiring board and constitute parts of a circuit in the printed wiring board device. Pads are provided on the wiring board in the circumference of the circuit parts, and the pads being electrically isolated from the circuit. Heat-absorbing dummy parts are mounted on the pads, and the dummy parts absorb heat from the circuit parts through the pads during reflow soldering.
Abstract:
A circuit board permits common use of the same circuit board without separately manufacturing the circuit board per providing destinations when similar circuit boards are manufactured for a plurality of providing destinations in the same factory. The circuit board has at least a first providing destination indicating region on which a first providing destination is indicated and a second providing destination indicating region located adjacent the first providing destination indicating region, on which second providing destination region, a second providing destination is indicated, the providing destination indicating regions other than that indicating an intended providing destination being hidden by mounting parts thereon.