Abstract: To provide an ultraviolet light irradiation device capable of inactivating bacteria, viruses, and the like with increased efficiency while ensuring safety. An ultraviolet light irradiation device according to the present invention includes a light source to emit ultraviolet light having a wavelength within a range of 190 nm or more and less than 240 nm, a housing to house the light source, a light extraction part to extract the ultraviolet light emitted from the light source out of the housing, and a diffusion transmission member to diffuse and transmit the ultraviolet light.

Abstract: A thick film paste composition used to apply a conductive pattern, comprising(a) spherical, non-coagulating fine particles of metallic silver having a surface area/weight ratio of at least 1.1 m.sup.2 /g and having a particle size of 1.0 .mu.m or less, and(b) fine particles of a glass frit having a softening point of 350.degree. to 620.degree. C. and contained in an amount of 2.1 weight parts or less per 100 weight parts of metallic silver,wherein (a) and (b) are dispersed in (c) an organic medium.

Abstract: Thick film paste composition for applying conductive patterns to automotive window glass comprising finely divided particles of metallic silver, glass frit having transition metal oxide, contained in the glass, all of the particulate solids being dispersed in an organic medium.

Abstract: Thick film paste composition for applying conductive patterns to automotive window glass comprising finely divided particles of metallic silver, glass frit, and selected transition metal oxides, all of the particulate solids being dispersed in an organic medium.

Abstract: A method of manufacturing a thermal printer head on a substrate having a heat accumulating layer on a surface thereof, a dot-like heat generating resistor group arranged in a straight line on said surface of said heat accumulating layer, and an electrode group for supplying power to said heat generating resistor group. The heat accumulating layer is formed by the sequential steps of:(1) forming a slip, which contains, as major component, an inorganic powder material for constituting said heat accumulating layer and an organic binder into a green sheet;(2) cutting the green sheet into the shape of heat accumulating layer;(3) laminating the cut green sheet to a predetermined position of the substrate; and(4) firing the green sheet.