摘要:
To provide an LED light source unit which is excellent in heat dissipation performance, able to prevent damage to LED and bright, and which has a long life.An LED light source unit comprising a printed board, at least one light emitting diode provided on the printed board, and an adhesive tape for fixing the printed board on the surface of a heat dissipating member, wherein the thermal conductivity of the adhesive tape is from 1 to 4 W/mK, and the withstand voltage between a rear side conductor circuit and a metal housing is at least 1.0 kV.
摘要:
Provided is a metal base circuit board having a new function of a light reflection in addition to the conventional printed circuit board function for mounting electronic parts. The metal base circuit board has a circuit arranged on a metal plate via an insulation layer. A white film is arranged at least one the insulation layer.
摘要:
Provided is a metal base circuit board having a new function of a light reflection in addition to the conventional printed circuit board function for mounting electronic parts. The metal base circuit board has a circuit arranged on a metal plate via an insulation layer. A white film is arranged at least one the insulation layer.
摘要:
A method of manufacturing a metal-base substrate having an insulative adhesive layer and a conductor layer on a metal-based material is provided. The method includes the steps of dispersing a disperse phase in an insulative adhesive-dispersing medium that contains a wetting dispersant and constitutes the insulative adhesive layer; laminating step of laminating the insulative adhesive on the conductor foil as feeding the roll-shaped conductor foil; curing the insulative adhesive on the conductor foil under heat into a B stage state and thus forming a composite of the conductor foil and the insulative adhesive layer in the B stage state; laminating the metal-based material on the insulative adhesive layer in the B stage state to give a laminate; and then curing the insulative adhesive layer in the B stage state into a C stage state by heat pressurization of the laminate.
摘要:
A method of manufacturing a metal-base substrate having an insulative adhesive layer and a conductor layer on a metal-based material is provided. The method includes the steps of dispersing a disperse phase in an insulative adhesive-dispersing medium that contains a wetting dispersant and constitutes the insulative adhesive layer; laminating step of laminating the insulative adhesive on the conductor foil as feeding the roll-shaped conductor foil; curing the insulative adhesive on the conductor foil under heat into a B stage state and thus forming a composite of the conductor foil and the insulative adhesive layer in the B stage state; laminating the metal-based material on the insulative adhesive layer in the B stage state to give a laminate; and then curing the insulative adhesive layer in the B stage state into a C stage state by heat pressurization of the laminate.
摘要:
A metal base circuit board, having an insulating layer with a linear expansion coefficient of 60 ppm per degree C. or higher and 120 ppm per degree C. or lower, a metal foil provided on one side of the insulating layer, comprising a metal material with a linear expansion coefficient of 10 ppm per degree C. or higher and 35 ppm per degree C. or lower, a circuit portion and a non-circuit potion having a linear expansion coefficient of 10 ppm per degree C. or higher and 35 ppm per degree C. or lower, and a white film formed on top of the insulating layer, circuit portion, and non-circuit portion, the total sum of the areas of the non-circuit portion and the circuit portion on top of the insulating layer being 50% or higher and 95% or lower relative to the area of the metal foil and the relation between the linear expansion coefficients of each of the materials being: linear expansion coefficient of insulating layer>linear expansion coefficient of metal foil>linear expansion coefficient of circuit portion and non-circuit portion, such that Lifespan of LEDs can be lengthened, and the workability of the printed circuit board during circuit formation and during LED mounting can be improved.
摘要:
Lifespan of LEDs can be lengthened, and the workability of the printed circuit board during circuit formation and during LED mounting can be improved.A metal base circuit board, having an insulating layer with a linear expansion coefficient of 60 ppm per degree C. or higher and 120 ppm per degree C. or lower, a metal foil provided on one side of the insulating layer, comprising a metal material with a linear expansion coefficient of 10 ppm per degree C. or higher and 35 ppm per degree C. or lower, a circuit portion and a non-circuit potion having a linear expansion coefficient of 10 ppm per degree C. or higher and 35 ppm per degree C. or lower, and a white film formed on top of the insulating layer, circuit portion, and non-circuit portion, the total sum of the areas of the non-circuit portion and the circuit portion on top of the insulating layer being 50% or higher and 95% or lower relative to the area of the metal foil, and the relation between the linear expansion coefficients of each of the materials being: linear expansion coefficient of insulating layer>linear expansion coefficient of metal foil>linear expansion coefficient of circuit portion and non-circuit portion.
摘要:
A composite sheet comprising at least one layer each of a substrate layer (layer A) made of a polystyrene resin and an ABS resin as the main components, a reinforcing layer (layer B) made of an ABS resin as the main component, and a surface layer (layer C) made of, as the main component, a polystyrene resin which contains a conductive filler, wherein the surface on at least one side is the above surface layer (layer C) is useful for a conductive composite sheet which has a small difference in physical properties between the machine and transverse directions and has high rigidity and folding endurance and which can easily be thermally formed into a tray or an embossed carrier tape.
摘要:
An electronic component packaging container which comprises a multilayer polyester sheet having a base layer comprising a polyethylene terephthalate type resin and a polycarbonate type resin and a surface layer comprising a polycarbonate type resin, formed on at least one side of the base layer, wherein the base layer contains from 70 to 97 wt % of the polyethylene terephthalate type resin and from 3 to 30 wt % of the polycarbonate type resin based on the total amount of the polyethylene terephthalate type resin and the polycarbonate type resin, and the thickness of the surface layer is from 10 to 30% of the total thickness.