Abstract:
The present invention relates to a method of making a hybrid wiring board with built-in stopper and interposer. In accordance with one preferred embodiment of the present invention, the method includes: forming a stopper on a dielectric layer; mounting an interposer on the dielectric layer using the stopper as a placement guide for the interposer; attaching a stiffener to the dielectric layer; and forming a build-up circuitry that covers the interposer, the stopper and the stiffener and provides signal routing for the interposer. Accordingly, the stopper can accurately confine the placement location of the interposer and avoid the electrical connection failure between the interposer and the build-up circuitry.
Abstract:
A wiring board includes a wiring forming region in which a plurality of wiring layers are stacked while sandwiching insulating layers, an outer periphery region which is arranged around the wiring forming region and in which a reinforcing pattern is formed in the same layer as each of the wiring layers. An area ratio of the reinforcing pattern to the outer periphery region and an area ratio of the wiring layer to the wiring forming region are substantially the same in each of the layers, and the reinforcing patterns exist without a gap in the outer periphery region when the wiring board is viewed in planar perspective.
Abstract:
A method of depositing one or more stiffener onto a wiring board includes the steps of engaging the wiring board onto a heat-retaining pallet to form an assembly, pre-heating the assembly to a temperature ranged from 70 to 140° C., and disposing the stiffeners onto the pre-heated wiring board of the assembly, wherein the pallet of the assembly retains sufficient heat for the wiring board to at least partially melt the stiffener, more preferably adhesive stiffener, to fix onto the wiring board upon disposition of the stiffeners.
Abstract:
A flexible flat cable assembly comprises: a flexible flat cable having two opposite top and bottom surfaces, and defining a plurality of golden fingers exposed out of the top surface; and a base attached to the bottom surface of the flexible flat cable and defining a protecting portion formed on a front end thereof to shield front ends of the plurality of golden fingers.
Abstract:
A surface mount packaging structure for semiconductor optical device and packaging method. A semiconductor optical device, disposed on a substrate, is electrically connected with a substrate through wires. A lower surface of the substrate is fixed on an upper surface of a flexible printed board that is provided with internal leads and external leads. The internal leads are electrically connected with the substrate through wires. A lower surface of the flexible printed board is fixed on a base board. A glass baffle is provided to form a window in front of a light-emitting or light-receiving surface of the semiconductor optical device. A focusing lens is adhered to the window of the glass baffle and is coupled with an optical path of the semiconductor optical device. The substrate and the semiconductor optical device thereon, the wires, and the internal leads on the flexible printed board are encased into packaging material.
Abstract:
A flexible device for electrically connecting an electric component and a printed circuit board together includes a main extension direction, and the flexible electric-connection device includes a first contact region formed at one end of the flexible electric-connection device in the main extension direction, as well as a second contact region formed at the other end of the flexible electric-connection device in the main extension direction. The flexible electric-connection device includes a stiffener, or the flexible electric connection device is combined with a supporting element. The electric component is provided so as to be in direct electric contact with the flexible electric-connection device via the first contact region.
Abstract:
A wiring board assembly includes: a plurality of insulating substrates of which each includes an insulating layer and a wiring layer; a wiring board that includes pads formed on the insulating substrate; and a semiconductor component that is joined on the pads by using solder bumps. The wiring board embeds a stiffening member whose thickness is thinner than that of the insulating layer and whose thermal expansion coefficient is smaller and Young's modulus is higher than those of the wiring layer and the insulating layer.
Abstract:
An electronic device includes a conductor plate, a circuit board placed with a distance to a surface of the conductor plate, a connector provided on the circuit board, a flexible cable having one end connected to the connector and laid down along the surface of the conductor plate, and a cable holding member which includes a sloped holding surface for holding at least part of a portion of the flexible cable ranging from the connector to the surface of the conductor plate and which is electrically connected to the conductor plate.
Abstract:
According to one embodiment, a flexible printed wiring board includes a component mounting portion to which a component is mounted and to which a reinforcing sheet is bonded. The component mounting portion includes an inner layer comprising a wiring pattern, and an outermost film layer disposed to cover the wiring pattern. The outermost film layer, to which the reinforcing sheet is bonded, is formed with a groove such that, when the reinforcing sheet is bonded, the groove extends in a region between the outermost film layer and the reinforcing sheet and communicates with an outside of the region.
Abstract:
Polymer materials are useful as electrode array bodies for neural stimulation. They are particularly useful for retinal stimulation to create artificial vision, cochlear stimulation to create artificial hearing, and cortical stimulation, and many related purposes. The pressure applied against the retina, or other neural tissue, by an electrode array is critical. Too little pressure causes increased electrical resistance, along with electric field dispersion. Too much pressure may block blood flow. Common flexible circuit fabrication techniques generally require that a flexible circuit electrode array be made flat. Since neural tissue is almost never flat, a flat array will necessarily apply uneven pressure. Further, the edges of a flexible circuit polymer array may be sharp and cut the delicate neural tissue. By applying the right amount of heat to a completed array, a curve can be induced. With a thermoplastic polymer it may be further advantageous to repeatedly heat the flexible circuit in multiple molds, each with a decreasing radius. Further, it is advantageous to add material along the edges. It is further advantageous to provide a fold or twist in the flexible circuit array. Additional material may be added inside and outside the fold to promote a good seal with tissue.