Patent ID: 8758891
Filing Date: 2014-06-24
Classification: B82Y,G02B,H01B,H01L,Y02E,Y10T

Abstract:
1. A conductive reflective film which is formed on a first surface of a substrate by calcining a layer containing metal nanoparticles, the conductive reflective film comprising: a contact surface contacting the substrate, and pores which appear on the contact surface and has an average diameter in the range of 30 to 95 nm, an average depth in the range of 30 to 95 nm in terms of position of the pores, and a number density of the pores of 30 pores/μm wherein the conductive reflective film has 80% or more reflectance from the substrate in a wavelength range of 500 to 1200 nm and wherein the substrate is a transparent substrate having a transmittance of 98% or more; and wherein the layer is obtained by coating a composition on the substrate, the composition includes the metal nanoparticles where 75% by mass or more of the nanoparticles are silver particles based on 100% by mass of solid components dispersed in a dispersion medium so that the metal nanoparticles are chemically modified by a protective agent which is an organic molecule having a carbon skeleton with 1 to 3 carbon atoms, and that 70% or more of the metal nanoparticles, in terms of number average, contained in the composition will have a primary particle size within a range of 10 to 50 nm, the composition includes at least one additive selected from the group consisting of an organic polymer, a metal oxide, a metal hydroxide, an organic metal compound and a silicone oil, a content of the additive is 0.1 to 20% by mass with respect to the silver particles that constitute the metal nanoparticle, the silver content is within a range of 2.5 to 95% by mass with respect to an entire dispersion, the thickness of the conductive reflective film is within a range of 0.05 to 2.0 μm, and wherein the conductive reflective film has a volume resistivity of 2×10