Abstract:
A method of manufacturing a wiring board for use in mounting of an electronic component includes: forming an outermost wiring layer on a surface side where the electronic component is mounted; forming an insulating layer so as to cover the wiring layer; and forming a concave portion in the insulating layer. The concave portion is formed by removing, using a mask formed in a required shape by patterning, an exposed portion of the insulating layer in a step-like shape until a surface of a pad defined at a portion of the wiring layer is exposed. The concave portion is preferably formed by removing the portion of the insulating layer by sand blast.
Abstract:
A semiconductor device has a flexible substrate which can be folded U-shape, and an outer surface of the flexible substrate being provided concave-convex portions for heat radiation. The semiconductor device also has a semiconductor chip which is mounted on an inner surface of the flexible substrate, and the chip being electronically connected with the flexible substrate.
Abstract:
An arrangement includes an optoelectronic component with two contacts; at least one further component part; at least one contact arranged between the optoelectronic component and the further component part; and at least one web arranged between the optoelectronic component and the further component part.
Abstract:
A method for forming an electronic device provides a casting master having a casting surface, and deposits a substrate material onto the casting surface to form a flexible substrate sheet of predetermined thickness, wherein the flexible substrate sheet has a circuit-side surface that is formed against the casting surface. The flexible substrate sheet is released from the master and secured against a carrier, with the circuit-side surface facing outward. An electronic device is then formed on the circuit-side surface.
Abstract:
A wiring board (package) has a structure in which multiple wiring layers are stacked one on top of another with insulating layers each interposed between corresponding two of the wiring layers, and the wiring layers are connected to each other through vias formed in the insulating layers. In the peripheral region around the chip mounting area of the outermost insulating layer on one of both surfaces of the board, a pad is formed in a bump shape to cover a surface of a portion of the outermost insulating layer, the portion being formed to protrude, and a pad whose surface is exposed from the insulating layer is arranged in the chip mounting area. A chip is flip-chip bonded to the pad of the package, and another package is bonded to the bump shaped pad in a peripheral region around the chip (package-on-package bonding).
Abstract:
A method of forming an asymmetrical encapsulant bead on a series of wire bonds electrically connecting a micro-electronic device to a series of conductors, the micro-electronic device having a planar active surface. The method has the steps of positioning the die and the wire bonds beneath an encapsulant jetter that jets drops of encapsulant on to the wire bonds, the drops of encapsulant following a vertical trajectory, tilting the die such that the active surface is inclined to the horizontal and, jetting the drops of encapsulant to form a bead of encapsulant material covering the series of wire bonds, the bead having a cross sectional profile that is asymmetrical about an axis parallel to a normal to the active surface.
Abstract:
A circuit board structure including a circuit board main body and an injection molded three-dimensional circuit device encapsulating at least a portion of the circuit board main body is provided. The three-dimensional circuit device includes a molded plastic body having a non-plate type, stereo structure, on which a three-dimensional pattern is also fabricated. The three-dimensional pattern is interconnected with a contact pad on the circuit board main body through a conductive via.
Abstract:
The invention relates to a resin film having a high adhesiveness to other materials, an adhesive sheet, a circuit board and an electronic apparatus in which an adhesive layer and the resin film are firmly adhered. A resin film (1) includes a plurality of projected portions (10) each having a filler (9) in an apex portion (10a) and a resin material. The projected portions (10) are formed on at least one surface of a sheet portion (16).
Abstract:
The present invention provides a connector configured to electrically connect two connection objects. The connector comprises an elastic member having a surface and a conductive film placed on the surface of the elastic member. The conductive film comprises two contact portions to be brought into contact with the connection objects, respectively, and a connect portion connecting the contact portions. Each of the contact portions comprises projections and a drainage arranged, at least in part, between the projections.
Abstract:
The range of selection of the material for a primary substrate and the material for a resin mask in a secondary substrate can be broadened, and short circuiting of a circuit can be reliably prevented. The shape of a primary substrate (1) is such that a circuit forming face (11) is in a convex form and a circuit non-forming face (12) is in a concave form, the difference in level between the circuit forming face (11) and the circuit non-forming face (12) is 0.05 mm, and the angle of side walls (13, 14) connecting the circuit forming face to the circuit non-forming face is 90°. In order to apply a catalyst, a palladium catalyst solution was immersed in a bath having a water depth of 500 mm at a liquid temperature of 40° C. for 5 min. Thereafter, a resin mask (3) is dissolved and removed, followed by electroless plating. As a result, the catalyst solution penetrates up to a part in which the creeping distance could have been increased, that is, up to both side walls (13, 14). That is, the catalyst penetration can be prevented, and short circuiting between conductive layers (50), that is, between circuits, can be prevented.