摘要:
The present invention is aimed to provide an electroless gold plating solution which requires less amount of a reducing agent, retains a sufficient deposition rate for a practical use, and has an excellent stability as a plating solution; and a method for carrying out an electroless gold plating. The present invention provides an electroless gold plating solution comprising a gold salt, a phenyl compound based reducing agent and a water-soluble amine and a method for plating using the gold plating solution.
摘要:
A field-pole magnet manufacturing apparatus manufactures magnet pieces that constitute a field-pole magnet arranged in a rotary electric machine by fracturing the magnet. This manufacturing apparatus includes: a support unit on which the magnet is placed; a fracture unit that is arranged opposite to the support unit across the magnet and is configured to fracture the magnet by pressing the magnet while in contact with the magnet; and a powder removal unit that is configured to remove crush powder produced by fracture of the magnet.
摘要:
Provided are an X-ray analyzer and a mapping method for an X-ray analysis which, in a inspection for a harmful substance contained in, for example, a material or a composite electronic component, enable determination as to whether a sample is normal or abnormal to be performed visually based on an image obtained by the X-ray mapping analysis. In the X-ray analyzer, an X-ray mapping image of a sample which is confirmed to be normal in advance is obtained as a reference mapping image. A mapping analysis is performed on a inspection sample. A difference from the reference mapping image is obtained for each pixel, to thereby display a difference mapping image. A region in which the amount of specific element is larger than a reference amount is displayed with high brightness, and hence an abnormal portion may be easily found.
摘要:
It is an object of the invention to provide a method for producing a substrate for mounting a semiconductor chip, that can reduce bridging and allows excellent wire bondability and solder connection reliability to be obtained, even when forming fine-pitch wirings. The method for producing a substrate for mounting a semiconductor chip according to the invention comprises a resist-forming step in which a resist is formed on the first copper layer of a stack comprising an inner board with an inner layer circuit on the surface and a first copper layer formed on the inner board separated by an insulating layer at the sections other than those that are to constitute a conductor circuit, a conductor circuit-forming step in which a second copper layer is formed by electrolytic copper plating on the first copper layer to obtain a conductor circuit, a nickel layer-forming step in which a nickel layer is formed by electrolytic nickel plating on at least part of the conductor circuit, a resist removal step in which the resist is removed, an etching step in which the first copper layer is removed by etching, and a gold layer-forming step in which a gold layer is formed by electroless gold plating on at least part of the conductor circuit.
摘要:
The invention relates to an adhesion assisting agent-bearing metal foil comprising a layer of an adhesion assisting agent containing an epoxy resin as an indispensable component on a metal, wherein the adhesion assisting agent layer has a thickness of 0.1 to 10 μm. The invention also relates to a printed wiring board being a multilayer wiring board having a plurality of layers, wherein an adhesion assisting agent layer is formed between insulating layers.
摘要:
An apparatus and method for surface finishing a workpiece is disclosed as including a workpiece supporting mechanism supporting a workpiece having a target shaped periphery with a given width to be surface finished and a tool holder holding a surface finish tool in abutting contact with the target shaped periphery of the workpiece. A pressure applying mechanism is operative to apply a pressure force to the surface finish tool through the tool holder to cause the surface finish tool to be held in pressured contact with the target shaped periphery, with the pressure force exhibiting a given distribution pattern depending upon an axial direction of the workpiece. A drive mechanism rotates the workpiece to allow the surface finish tool to surface finish the target shaped periphery into a given geometrical profile, variably contoured along an axis of the workpiece depending on the given pressure distribution pattern.
摘要:
A printed wiring board having a conductor circuit comprising a copper layer adjacent to an insulating layer and an electroless gold plating, wherein the insulating layer has ten-point mean surface roughness (Rz) of 2.0 μm or less is provided. According to the present invention, there is no such a defect that gold plating is deposited on a resin, and fine wiring formation with accuracy is realized.
摘要:
A printed wiring board having a conductor circuit comprising a copper layer adjacent to an insulating layer and an electroless gold plating, wherein the insulating layer has ten-point mean surface roughness (Rz) of 2.0 μm or less is provided. According to the present invention, there is no such a defect that gold plating is deposited on a resin, and fine wiring formation with accuracy is realized.
摘要:
A lapping apparatus lapping a work having a pre-machined surface comprises a lapping film which includes a thin substrate having a surface provided with abrasive grains, a shoe disposed at a back surface side of the lapping film, a shoe driving unit which drives the shoe toward the work in order to press the abrasive-grained surface of the lapping film to the pre-machined surface of the work, a rotational driving unit which drives the work rotationally, a detecting unit which detects the position of the rotating work in the rotating direction, and a controlling unit which controls the pressing force of the shoe driving unit so as to drive the shoe correspondingly to the position of the work in the rotating direction during machining.
摘要:
A semiconductor package includes a semiconductor chip having a major surface and first pads formed on the major surface. The semiconductor package also includes a package substrate having (a) opposite first and second major surfaces, (b) a side surface extending between the first and second major surfaces, (c) a pad forming region adjacent to and along the side surface, (d) second pads formed on the pad forming region, (e) external electrodes formed on the first major surface of the package substrate, wherein the second major surface of the package substrate is fixed to the major surface of the semiconductor chip, and wherein the external electrodes are electrically connected to the second pads. The semiconductor package further includes bonding wires electrically connecting the first pads to the second pads and a sealing material covering the bonding wires and first and second pads.