摘要:
Disclosed herein is a recording medium comprising a base material and a porous surface layer containing particles of a thermoplastic resin, wherein the breadth of the particle size distribution of the particles of the thermoplastic resin is within 3.sigma., and the proportion of particles having a particle size at most a fifth of the average particle size of the particles of the thermoplastic resin is 10% or lower.
摘要:
A recording medium comprises a porous outermost layer on a substrate, the porous outermost layer containing a particulate thermoplastic resin, and the particulate thermoplastic resin exhibiting a &Dgr;E value of not higher than 20 after light exposure. The difference of glass transition temperature of the particulate thermoplastic resin from minimum film-forming temperature thereof may be not less than 10° C., and the minimum film-forming temperature is not lower than 50° C. A process for producing the recording medium comprises forming a porous outermost layer by heat treatment at a temperature of not lower than the glass transition temperature of the particulate thermoplastic resin, but not higher than the minimum film-forming temperature thereof.
摘要:
There is provided a recording medium comprising a substrate and an ink-receiving layer containing alumina hydrate formed thereon, wherein the alumina hydrate is present unoriented in the ink-receiving layer and a diffraction intensity fluctuation &dgr; in a diffraction pattern is not more than 5%, when irradiating an electron beam to a cross section of the ink-receiving layer.
摘要:
A recording medium comprising on a base material an ink-receiving layer containing an alumina hydrate, said ink-receiving layer being formed by applying a coating liquid containing said alumina hydrate to said base material followed by drying to form a layer to be said ink-receiving layer, swelling said layer to be said ink-receiving layer again, and pressing the swollen layer to a heated mirror-finish drum for drying, the glossiness of the surface of the recording medium on the side of the ink-receiving layer as measured at 20° being 20% or more.
摘要:
Provided is a fine powder material for forming an ink-receiving layer on a recording medium, wherein a pore radius maximum exists within a range of from 90 to 120 Å in a pore radius distribution of said fine powder material and wherein a total volume of pores having radii not exceeding 50 Å is not more than 6.0% of a volume of all pores.
摘要:
Provided is a recording medium provided with an ink-receiving layer on at least one surface of a substrate, wherein said ink-receiving layer is composed of a porous layer comprising pigment particles and mutually fused thermoplastic resin particles.
摘要:
In a semiconductor light-emitting device including a substrate, a first compound semiconductor layer including an active layer formed on the substrate, a second compound semiconductor layer of a ridge type formed on the first compound semiconductor layer, and a protective film formed above the first compound semiconductor layer on both sides of the second compound semiconductor layer, the disclosed semiconductor light-emitting device has a current blocking layer formed above the first compound semiconductor layer outside the protective film. This semiconductor light-emitting device is with a high production yield since readily cleaved and assembled, with adequately squeezed currents, and with, when assembled in the junction-down type, a high output and a longer life span.
摘要:
The present invention provides a semiconductor light-emitting device including a first clad layer comprising a first conductive type of AlGaAsP compound, a second clad layer that is located next to the first clad layer, comprises a first conductive type of AlGaInP compound and has a thickness of up to 0.5 .mu.m, an active layer that is located next to the second clad layer and comprises a first or second conductive type AlGaInP or GaInP, a third clad layer that is located next to the active layer, comprises a second conductive type of AlGaInP compound and has a thickness of up to 0.5 .mu.m, and a fourth clad layer that is located next to the third clad layer and comprises a second conductive type of AlGaAsP compound, and/or a light-extracting layer that comprises a second conductive type AlGaP or GaP and has a thickness of 1 .mu.m to 100 .mu.m.
摘要:
In a semiconductor light-emitting device including a substrate, a first compound semiconductor layer including an active layer formed on the substrate, a second compound semiconductor layer of a ridge type formed on the first compound semiconductor layer, and a protective film formed above the first compound semiconductor layer on both sides of the second compound semiconductor layer, the disclosed semiconductor light-emitting device has a current blocking layer formed above the first compound semiconductor layer outside the protective film. This semiconductor light-emitting device is with a high production yield since readily cleaved and assembled, with adequately squeezed currents, and with, when assembled in the junction-down type, a high output and a longer life span.
摘要:
A process for producing a magnetic recording medium includes coating a nonmagnetic substrate with a magnetic paint and applying a rotating magnetic field for orientation to the raw fabric with magnetic paint in a yet unsolidified state on the substrate, in which a magnetic field is applied to the above raw fabric so that the magnetic lines of force may pass from the back face to the front surface or from the front surface to the back surface of the raw fabric before application of the rotating magnetic field for orientation, thereby effecting preliminary orientation.