Abstract:
A rolled copper or copper alloy foil having a roughened surface formed of fine copper particles is obtained by subjecting a rolled foil to roughening plating with a plating bath containing copper sulfate (Cu equivalent of 1 to 50 g/L), 1 to 150 g/L of sulfuric acid, and one or more additives selected among sodium octyl sulfate, sodium decyl sulfate, and sodium dodecyl sulfate under the conditions of temperature of 20 to 50° C. and current density of 10 to 100 A/dm2. The foil has reduced craters, which are defects unique to rolled foils having a roughened surface, has high strength, adhesive strength with the resin layer, acid resistance and anti-tin plating solution properties, high peel strength, favorable etching properties and gloss level, and is suitable for producing a flexible printed wiring board capable of bearing a fine wiring pattern. A method of roughening the rolled foil is also provided.
Abstract:
Provided is a rolled copper or copper alloy foil having a roughened surface formed of fine copper particles, obtained by subjecting a rolled copper or copper alloy foil to roughening plating with a plating bath containing copper sulfate (Cu equivalent of 1 to 50 g/L), 1 to 150 g/L of sulfuric acid, and one or more additives selected among sodium octyl sulfate, sodium decyl sulfate, and sodium dodecyl sulfate under the conditions of a temperature of 20 to 50° C. and a current density of 10 to 100 A/dm2. The provided rolled copper or copper alloy foil subject to roughening is reduced in craters which are obvious defects unique to rolled copper or copper alloy foils having a roughened surface, has high strength, adhesive strength with the resin layer, acid resistance and anti-tin plating solution properties, high peel strength, favorable etching properties and gloss level, and also suits for use in producing a flexible printed wiring board capable of bearing a fine wiring pattern. Additionally provided is a method of roughening the rolled copper or copper alloy foil.
Abstract:
Provided is a rolled copper or copper alloy foil having a roughened surface formed of fine copper particles, obtained by subjecting a rolled copper or copper alloy foil to roughening plating with a plating bath containing copper sulfate (Cu equivalent of 1 to 50 g/L), 1 to 150 g/L of sulfuric acid, and one or more additives selected among sodium octyl sulfate, sodium decyl sulfate, and sodium dodecyl sulfate under the conditions of a temperature of 20 to 50° C. and a current density of 10 to 100 A/dm2. The provided rolled copper or copper alloy foil subject to roughening is reduced in craters which are obvious defects unique to rolled copper or copper alloy foils having a roughened surface, has high strength, adhesive strength with the resin layer, acid resistance and anti-tin plating solution properties, high peel strength, favorable etching properties and gloss level, and also suits for use in producing a flexible printed wiring board capable of bearing a fine wiring pattern. Additionally provided is a method of roughening the rolled copper or copper alloy foil.
Abstract:
A rolled copper or copper alloy foil having a roughened surface formed of fine copper particles is obtained by subjecting a rolled foil to roughening plating with a plating bath containing copper sulfate (Cu equivalent of 1 to 50 g/L), 1 to 150 g/L of sulfuric acid, and one or more additives selected among sodium octyl sulfate, sodium decyl sulfate, and sodium dodecyl sulfate under the conditions of temperature of 20 to 50° C. and current density of 10 to 100 A/dm2. The foil has reduced craters, which are defects unique to rolled foils having a roughened surface, has high strength, adhesive strength with the resin layer, acid resistance and anti-tin plating solution properties, high peel strength, favorable etching properties and gloss level, and is suitable for producing a flexible printed wiring board capable of bearing a fine wiring pattern. A method of roughening the rolled foil is also provided.
Abstract:
A laminate for flexible wiring in which copper plating is entirely or locally applied on a copper foil that is cladded on an insulating resin substrate, characterized in that a ratio A=[(200)/{(111)+(200)+(220)+(311)}]×100, i.e. a ratio of an area intensity of a peak in the X-ray diffraction of the copper plating surface is more than 90. The present invention can provide the laminate for flexible wiring in which copper plating is entirely or locally applied on a copper foil cladded on an insulating resin substrate, characterized in having particularly high bendability and enables the formation of fine patterns, namely, high dense patterns of wiring.
Abstract:
Disclosed is a copper foil for printed circuits prepared by forming a primary particle layer of copper on a surface of a copper foil, and then forming a secondary particle layer based on ternary alloy composed of copper, cobalt and nickel on the primary particle layer; in which the average particle size of the primary particle layer is 0.25 to 0.45 μm, and the average particle size of the secondary particles layer based on ternary alloy composed of copper, cobalt and nickel is 0.05 to 0.25 μm. Provided is a copper foil for printed circuits, in which powder fall from the copper foil can be reduced and the peeling strength and heat resistance can be improved by forming a primary particle layer of copper on a surface of a copper foil, and then forming a secondary particle layer based on copper-cobalt-nickel alloy plating on the primary particle layer.
Abstract:
Provided is a copper-clad laminate obtainable by bonding a copper foil on which roughening treatment including copper-cobalt-nickel alloy plating is performed and a liquid crystal polymer to each other, wherein the copper-clad laminate is free from a roughening particle residue on a surface of the liquid crystal polymer resin after copper foil circuit etching. The copper-clad laminate obtainable by bonding a copper foil and a liquid crystal polymer to each other, wherein the copper foil includes a copper primary particle layer formed on a surface bonded to the liquid crystal polymer and a secondary particle layer formed on the primary particle layer and made from a ternary alloy including copper, cobalt, and nickel; the primary particle layer has an average particle size of 0.25 to 0.45 μm; and the secondary particle layer has an average particle size of 0.05 to 0.25 μm.
Abstract:
An image shot by a shooting unit is stored in a shot image storing unit. An expected shooting state storing unit stores expected shooting state information which represents an expected shooting state of an object to be shot. A guide direction determining unit references the image stored in the shot image storing unit and the expected shooting state information, and determines in which direction the object to be shot, which is shot by the shooting unit, is to be guided. A guide direction instruction outputting unit notifies a user of a result of the determination made by the guide direction determining unit.
Abstract:
A substrate for packaging a semiconductor device having a bump thereon according to the present invention is characterized by that the substrate has an electrode terminal to which the bump is to be connected, the electrode terminal has a recess formed thereon to the receive at least a top of the bump, and at least a top of the surface of the electrode terminal is covered by a metal layer having a lower melting point than that of the bump.
Abstract:
A method of mounting a plurality of semiconductor elements each having bump electrodes on a wiring board by pressing the semiconductor elements to the wiring board while aligning the electrodes and heating the structure. In the mounting method, one or more heat sinks are previously joined to the backs opposite to the surfaces with the bump electrodes formed thereon of the semiconductor elements.