Abstract:
An ink jet head, includes: an actuator including a plurality of terminals; a wiring material including a base made of a flexible resin film on which a plurality of lands are arranged in arrays corresponding to the plurality of terminals, the wiring material of which one end is superimposed on a surface of the actuator, and which is extended in a direction parallel to the surface of the actuator; and a drive circuit for driving the actuator, wherein: the wiring material includes a small width portion, of which a width in a direction, perpendicular to an extended direction is smaller than that of the one end superimposed on the actuator, arranged on an extended portion; and the drive circuit is mounted on the extended portion; and wiring patterns are formed on the wiring material, for connecting the drive circuit and the plurality of lands.
Abstract:
For a suppressed breakage after a flip chip connection of a semiconductor device using a low-permittivity insulation film and a lead-free solder together, with an enhanced production yield, bump electrodes (2) are heated by a temperature profile having, after a heating up to a melting point of the bump electrodes (2) or more, a cooling in which a temperature within a range of 190 to 210° C. is kept for an interval of time within a range of 3 to 15 minutes, and a condition is met, such that 1.4
Abstract:
A method for connecting circuit boards, comprising: (i) preparing a first circuit board having connection parts assigned to end parts of a plurality of conductor wirings, and a second circuit board having connection parts assigned to corresponding end parts of a plurality of conductor wirings; (ii) disposing the connection parts of the first circuit board to face the connection parts of the second circuit board with a thermosetting adhesive film between the connection parts of the circuit boards; and (iii) applying heat and pressure to the connection parts and to the thermosetting adhesive film sufficiently high to thoroughly push away the adhesive film so as to establish electrical contact between connection parts of the circuit boards facing each other and to allow for curing of the adhesive; wherein the conductor wirings constituting the connection parts of at least one of the first and second circuit boards contain non-linear wirings.
Abstract:
A printed wiring board having an insulating base material; a wiring formed on at least one surface of the insulating base material, the wiring forming a predetermined circuit pattern; a first connection terminal portion formed on the surface and electrically connected to the wiring, the first connection terminal portion having a first width; a second connection terminal portion formed on the surface and electrically connected to the wiring, the second connection terminal portion having a second width; and a cover layer configured to cover the wiring and expose the first and the second connection terminal portion.
Abstract:
A plasma display apparatus comprising a connector is provided. The plasma display apparatus comprises a plasma display panel comprising an electrode of a predetermined width and a connector comprising an electrode line of a width narrower than the predetermined width of the electrode to supply a driving signal to the electrode. A distance between the electrode line and an adjacent electrode line is longer than a distance between the electrode and an adjacent electrode.
Abstract:
An electronic device comprised of a wiring board with a semiconductor component. The device is unlikely to have any defects, such as cracks to a solder joint portion during a reflow process of a flip-chip connection. The semiconductor component is flip-chip bonded at a pad array at a component side thereof to a pad array at a board side by way of an individual solder joint portion. In a solder resist layer at a semiconductor component side and a solder resist layer at a board side, D/D0 is prepared to be in a range of 0.70 to 0.99, where D is a bottom inner diameter of an opening at the board side and D0 is a bottom inner diameter of an opening at the component side.
Abstract:
A circuit module includes connection electrodes on a plate-shaped board and connection electrodes on a frame-shaped board that are bonded together with conductive bonding materials there between. Circuit components are provided in portions of a surface of the plate-shaped board, the portions being located inward relative to the frame-shaped board. A sealing resin is filled and cured in a cavity, which is defined by the frame-shaped board and the plate-shaped board. Since the center of each of the connection electrodes on the frame-shaped board is inwardly displaced relative to the center of a corresponding one of the connection electrodes on the plate-shaped board by α, a curing contraction stress of the sealing resin is mitigated by a curing contraction stress of the conductive bonding materials. Thus, deformation of the frame-shaped board is suppressed.
Abstract:
A structure, for controlled collapse chip connection (C4) between an integrated circuit (IC) and a substrate, that alleviates the adverse effects resulting from induced stresses in C4 solder joints, the structure includes: a first and second array defined on the ball limiting metallurgy (BLM) side of the IC; a first and second array of surface mount (SM) pads arranged on the substrate placement side; and wherein the reduction of the adverse effects resulting from the induced stress in the solder joints is facilitated by varying the relative alignment of the first and second arrays of SM pads to the first and second arrays of solder balls.
Abstract:
A plasma display apparatus comprising a connector is provided. The plasma display apparatus comprises a plasma display panel comprising an electrode of a predetermined width and a connector comprising an electrode line of a width narrower than the predetermined width of the electrode to supply a driving signal to the electrode. A distance between the electrode line and an adjacent electrode line is longer than a distance between the electrode and an adjacent electrode.
Abstract:
A bumpless chip package including at least one chip and an interconnection structure is provided. The chip has an active surface and a non-active surface opposite the active surface, and has a die pad arrangement disposed on the active surface of the chip. The die pad arrangement includes at least one first pad and at least one second pad. On the active surface of the chip, the projection area of the second pad is greater than that of the first pad. The active surface of chip faces the interconnection structure to embed within the interconnection structure. The interconnection structure has an inner circuit and a plurality of contact pads. The contact pads are disposed on a contact surface of the interconnection structure. Moreover, at least one of the first pad and the second pad is electrically coupled to at least one of the contact pads through the inner circuit.