Abstract:
Disclosed is a method for manufacturing a circuit board, including preparing a substrate having a resin layer and a stop layer, forming at least one conduction hole penetrating the resin layer and stopping at the stop layer, forming a first metal layer through a sputtering process, forming a second metal layer on the first metal layer through a chemical plating process, forming a third metal layer having a circuit pattern, exposing part of the second metal layer and filling up the conduction hole through an electroplating process, and etching the second metal layer and the first metal layer under the second metal layer to expose the resin layer under the first metal layer. Since the first metal layer provides excellent surface properties, the second and third metal layers are well fixed and stable. The etched circuit pattern has a line width/pitch less than 10 μm for fine line width/pitch.
Abstract:
Disclosed is a magnetic excitation coil structure including a magnetic coil sheet formed of a thin film and rolled as a cylindrical body with a hollow hole, and an insulation layer covering the outer surface of the cylindrical body formed by the magnetic coil sheet for protection. The magnetic coil sheet includes a flexible substrate, a dielectric layer attached to the flexible substrate, and a plurality of patterned circuit layers embedded in the flexible substrate and in contact with the dielectric layer. Each patterned circuit layer is separate, and the upper surfaces of the patterned circuit layers and the upper surface of the flexible substrate form a co-plane. The magnetic coil structure provides an electrical function of coil, which is enhanced by the patterned circuit layer due to its high aspect ratio of the electrical circuit, thereby greatly increasing the whole magnetic flux and electromagnetic effect.
Abstract:
A carrier board structure includes at least one upper magnetic coil, at least one lower magnetic coil, a flexible board, a dielectric layer, at least one connection pad and at least one gold finger. The flexible board has a middle region having a middle hole, and two side regions thinner than the middle region. A groove used as a fold line is provided on the lower surface of each side region bordering on the middle region. The upper and lower magnetic coils are configured in the flexible board and separated by the dielectric layer. The gold fingers are provided on the two side regions and connected to the upper magnetic coils. The upper and lower magnetic coils are around the middle hole and connected by the connection pads. The fold lines help the two side regions to fold without damage to the upper and lower magnetic coils.
Abstract:
A double sided board with buried element and a method for manufacturing the same are disclosed. At least one buried element is fixed on a dielectric layer and embedded in an insulation layer. First and second electrical circuits are formed on upper and lower surfaces of the insulation layer, respectively. At least one through-hole is formed in the insulation layer and filled with a conductive layer to electrically connect the first and the second electrical circuits. The dielectric layer beneath the buried element and the insulation layer above the buried element are provided with at least one opening, respectively, which is filled with the conductive layer, thereby connecting the conductive layer and external circuits or electrical elements. Additionally, the first and second electrical circuits are covered with first and second solder masks, respectively, so as to avoid environmental effect and improve preciseness of the circuits.
Abstract:
An enhanced chip board package structure includes a chip board and a plurality of enhanced structures, which are formed in the blind openings of the non-effective region of the chip board. Each enhanced structure has an opening. The mechanical strength is reinforced by the enhanced structures without changing the whole thickness so as to overcome the problem of warping. Meanwhile, the three-dimensional stability is thus enhanced. The opening of the enhanced structure can be selectively filled with the filler such that the mechanical strength is further reinforced and the thermally conductive effect is greatly improved.
Abstract:
Disclosed is a method of manufacturing a stacked multilayer structure, including the steps of forming a first circuit layer with bumps on a substrate, punching an aluminum plate to form recesses corresponding to the bumps, forming openings in a plastic film including a glass fiber layer corresponding to the bumps, pressing the aluminum plate, the plastic film and the substrate, removing the aluminum plate, polishing to level the resulting surface, forming a second circuit layer connected to the first circuit layer, and finally removing the substrate to form the stacked multilayer structure. Because the glass fiber layer in the plastic film is not exposed after polishing, the thickness of the dielectric layer is uniform and the reliability of the circuit layer is improved so as to increase the yield.
Abstract:
A chip board package structure includes a circuit board part, a chip board part and a solder used to solder the circuit board part and the chip board part. A chip on the chip board part is connected to an electrical circuit by wiring or soldering. A surface treatment metal layer includes at least nickel, palladium and gold formed on part of the surface of the circuit layer on the chip board. A copper-tin intermetallic compound is formed on joints of the second solder and the surface treatment metal layer, and the other part of the circuit layer is directly connected to the solder to form the copper-tin intermetallic compound. In addition to the lower package cost, with the shape feature of the copper-tin intermetallic compound, it is possible to increase the contact area with the solder, thereby improving the reliability of the soldering process and the yield.
Abstract:
A method of manufacturing a laminate circuit board which includes the sequential steps of metalizing the substrate to form the base layer, forming the first circuit metal layer, forming at least one insulation layer and at least one second circuit metal layer interleaved, removing the substrate, forming the support frame and forming the solder resist is disclosed. The laminate circuit board has a thickness less than 150 μm. The support frame which does not overlap the first circuit metal layer is formed on the edge of the base layer by the pattern transfer process after the substrate is removed. The base layer formed of at least one metal layer is not completely removed. The support frame provides enhanced physical support for the entire laminate circuit board without influence on the electrical connection of the circuit in the second circuit metal layer, thereby solving the warping problem.
Abstract:
Disclosed is a method of manufacturing a stacked multilayer structure, including the steps of forming a first circuit layer with bumps on a substrate, punching an aluminum plate to form recesses corresponding to the bumps, forming openings in a plastic film including a glass fiber layer corresponding to the bumps, pressing the aluminum plate, the plastic film and the substrate, removing the aluminum plate, polishing to level the resulting surface, forming a second circuit layer connected to the first circuit layer, and finally removing the substrate to form the stacked multilayer structure. Because the glass fiber layer in the plastic film is not exposed after polishing, the thickness of the dielectric layer is uniform and the reliability of the circuit layer is improved so as to increase the yield.
Abstract:
A chip support board structure which includes at least a metal substrate, a block layer, a paddle, an insulation layer, a circuit layer and a solder resist is disclosed. The circuit layer connects with the paddle. The material of the block layer is different from that of the metal substrate and the block layer is provided between the metal substrate and the paddle such that the shape and the depth of the paddle is maintained constant and the problem of different depth and easily peeling off is avoided, thereby improving the yield rate of the chip support board.