Abstract:
Embodiments relate to a method and apparatus for rework of a BGA package. Memory shape material is placed adjacent to a plurality of solder joints of the package. Stimulation is applied to the material, with the stimulation causing the material to change from a non-stimulated shape to a stimulated shape. This stimulation causes an expansion of the material. As the material expands, it exerts a tensile force on the BGA package and an adjacently positioned carrier, causing a separation of the two components, while mitigating collateral heat of adjacently positioned components.
Abstract:
Embodiments of the invention relates to a method for rework of a BGA package. Memory shape material is placed adjacent to a plurality of solder joints of the package. Stimulation is applied to the material, with the stimulation causing the material to change from a non-stimulated shape to a stimulated shape. This stimulation causes an expansion of the material. As the material expands, it exerts a tensile force on the BGA package and an adjacently positioned carrier, causing a separation of the two components, while mitigating collateral heat of adjacently positioned components.
Abstract:
A portable input device includes a flexible main body, a sensing electrode layer, a protection layer and a memory metal body. The flexible main body has a first face and a second face. The sensing electrode layer has a first sensing electrode and a second sensing electrode disposed on the second face of the flexible main body. The protection layer is correspondingly disposed on the second face of the flexible main body to cover the sensing electrode layer. The memory metal body is disposed on one face of the flexible main body or one face of the protection layer for curling the flexible main body for easy carry or storage. Accordingly, the convenient portable input device is flexible, lightweight and thin for a user to conveniently carry.
Abstract:
A technique for attaching solder balls of a BGA to a PCB. In one example embodiment, this is accomplished by applying solder paste onto at least one of a plurality of contact pads on a PCB. At least one of a plurality of solder balls of an IC device are then onto the at least one of the plurality of contact pads on the PCB. The temperature is then increased to reflow the solder paste. The IC device is then pulled away from the PCB as a function of a geometric shape of the IC device and held in a new position upon reflowing the solder paste to transform the at least one of the plurality of solder balls and the reflowed solder paste into a high shear strength solder joint structure. The reflow temperature is then lowered to room temperature to attach the high shear strength solder joint structure to the at least one of the plurality of lands on the PCB.
Abstract:
The invention provides a fastener assembly suitable for joining a first element such as a circuit board to a second element such as a casing or another circuit board. The fastener assembly includes a first component which has a pin and a second component which includes a cavity for receiving at least part of the pin. In one aspect, at least part of the second component capable of being received within a bore in the first element. Either the first component or the second component is made of material which can change from a first shape to a second shape at a particular temperature. The pin of the first component is adapted to be locked into the cavity of the second component when the second shape is attained, through interaction of the material with the cavity, without deformation of the pin.
Abstract:
Quick release bolt assembly included shank and head of larger cross-section than that of shank. The screw thread of shank is adapted to rotatably engage with a complementary screw thread in a nut. Disengagement means are adapted in use to disengage the head or the nut without rotation of the nut or shank. The disengagement means includes a material such as shape memory alloy or epoxy resin, adapted to change form to facilitate engagement when activated. Activation may take place by a direct power supply or remotely by a radio frequency, magnetic, ultrasonic or infra red signal. Bolt can be used for anchoring seat belts. Computer systems and methods for the identification of a target, including enquiring as to the status of the target and having means to command the target to change the status are also disclosed and claimed.
Abstract:
In a flexible print circuit having a plurality of signal wires, core wires formed from a shape memory material are provided on the two end portions thereof in the direction of width, and are caused to memorize a wiring completion shape within an electronic instrument in advance. In a wire harness having a plurality of signal wires, core wires formed from a shape memory alloy are disposed on the two sides of the planar signal wire array, or positioned along the central axis of the signal wires which are bundled into circular form. A guide frame for guiding a wire harness having a plurality of signal wires and which is caused to memorize in advance a shape which removes the wire harness from the movement range of a movable component within the electronic instrument.
Abstract:
The present invention relates to apparatus and methods for minimizing open electrical connections between carrier substrates and components connected thereto that occur due to sag in the substrate incurred due to exposure to an increasing heat profile encountered to secure the component to the substrate. A zero insertion force heat activated retention pin expands or bends during the temperature increase, creating an upward force on the printed circuit board. This upward force counters the downward sag forces and enables the carrier substrate to maintain a coplanar relationship with the component being connected.
Abstract:
A method of fabricating and using an interconnection element that includes a first element material adapted to be coupled to a substrate and a second element material comprising a material having a transformable property such that upon transformation, a shape of the interconnection is deformed. An example is a material that has a transformable property such that a volume of the first and/or second element material may undergo a thermal transformation from one volume to a different volume (such as a smaller volume) resulting in the deformation of the interconnection element.
Abstract:
An apparatus to retain an assembled component on one side of a double-sided printed circuit board during reflow of other components subsequently positioned on an opposite side of the double-sided printed circuit board and methods for manufacturing and using the same. The retainer includes a heat-expandable member and a retainer member. Being formed from a heat-expandable material, the heat-expandable member is coupled with the retainer member and is disposed about a periphery thereof. The retainer member is configured to be coupled with a component and, when the component is assembled onto a double-sided printed circuit board, to be received by an opening formed in the double-sided printed circuit board. The heat-expandable member is configured to expand during assembly of the component, engaging an inner surface that defines the opening. Thereby, the component is retained and supported when the double-sided printed circuit board is subsequently inverted, populated, and reflowed.