摘要:
An object of the present invention is to provide an electronic component mounting structure having no degradation of bonding reliability and small warpage at the same time even when a die becomes more extensive in a mounting structure including a semiconductor device carrying a flip-chip mounting.Such electronic component mounting structure comprises a substrate and a quadrate electronic component mounted on the substrate, wherein a gap between the substrate and the electronic component is filled with a first cured resin filling at least a corner area of the electronic component and a second cured resin filling at least a center area of the electronic component, and a flexural modulus of the first cured resin is higher than a flexural modulus of the second cured resin.
摘要:
The object of the invention is to provide a protective sheet for photovoltaic apparatus best-suited to build up a photovoltaic apparatus having higher light efficiency than could be achieved with conventional structure.The protective sheet for photovoltaic apparatus comprises a transparent substrate, and a transparent resin layer located on the surface of the transparent substrate and having fine convexities and concavities. The transparent resin of the transparent resin layer has a refractive index equal to or less than that of the transparent substrate.
摘要:
The invention has for its object to coat a single layer form of low-refractive organic thin-film layer on a cover glass of a solar battery to enhance the light-collection efficiency of a solar battery module by a simple method, thereby enhancing the ability of collect sunlight.The invention provides a coating layer for solar batteries which can be formed directly on a protective layer of a solar battery module and used in direct contact with the air. The fluorine-containing coating layer for solar batteries is characterized by having a fluorine content of 5% by weight or greater. This coating layer or protective layer is formed by polymerizing and curing a composition comprising a methacrylate compound and/or an acrylate compound containing a fluoroalkyl group and/or a fluorine-containing polymer dissolved or dispersed in an organic solvent, a fluorine-free organic compound containing 1 to 5 acryloyl groups or methacryloyl groups, and a photo-polymerization initiator, optionally with the addition of fumed silica to it.
摘要:
The present invention relates to a composition for low-refractive-index films, components (b) and (c), and an organic solvent. Component (b) is a fluorine-containing polymer. Component (c) is one or more of acrylic acid derivatives and methacrylic acid derivatives having 1 to 5 acryloyl groups or methacryloyl groups. Component (b) is a copolymer comprising 10 to 50 parts by mole of one or more of fluorine-containing polymers having cyclic structures as represented by formulae (1), (2) and (3), and tetrafluoroethylene; 0 to 50 parts by mole of hexafluoropropylene; 90 to 10 parts by mole of vinylidene fluoride; and 10 to 100 parts by mole of vinyl fluoride and component (b) is one or more of methacrylate compounds and acrylate compounds containing a fluoroalkyl group having 1 to 10 carbon atoms.