Abstract: A light emitting device has a substrate, an LED mounted on the substrate. A first transparent layer seals the LED, and a second transparent layer is provided around the first transparent layer. Particles of fluorescent material are included in the second transparent layer. A reflector layer is formed on outside walls except an upper side.

Abstract: A light emitting device has a substrate, an LED mounted on the substrate. A first transparent layer seals the LED, and a second transparent layer is provided around the first transparent layer. Particles of fluorescent material are included in the second transparent layer. A reflector layer is formed on outside walls except an upper side.

Abstract: A light emitting device has a substrate, an LED mounted on the substrate. A first transparent layer seals the LED, and a second transparent layer is provided around the first transparent layer. Particles of fluorescent material are included in the second transparent layer. A reflector layer is formed on outside walls except an upper side.

Abstract: A light emitting device has a substrate, an LED mounted on the substrate. A first transparent layer seals the LED, and a second transparent layer is provided around the first transparent layer. Particles of fluorescent material are included in the second transparent layer. A reflector layer is formed on outside walls except an upper side.

Abstract: Disclosed herein is a surface-mount type light emitting diode wherein a reflection frame is placed around a light emitting diode element mounted on an upper surface of a glass epoxy substrate, a first resin encapsulator mixed with a wavelength-converting material is charged into the reflection frame to seal the light emitting diode element, a second resin encapsulator and a third resin encapsulator used as a surface layer are stacked on an upper portion of the glass epoxy substrate including the reflection frame in layer form to seal the entirety of the first resin encapsulator, and an ultraviolet absorbent is mixed into at least a third resin encapsulator. A wavelength-converting material such as a luminescent material or the like becomes hard to be affected by externally-incoming ultraviolet radiation or the like, whereby the aging of the wavelength-converting material can be controlled.

Abstract: A glass substrate manufacturing method advantageously applicable to magnetic recording disk glass substrates, LCD glass substrates, photomasks glass substrates, or optical memory glass substrates. The method includes the steps of forming a film of a solution on at least a principal surface of a sheet glass formed using a down-drawing method, the solution containing a water soluble inorganic material and a surface-active agent; sandwiching both sides of a single sheet glass on which the film is formed or of a laminated structure of two or more sheet glasses with a densified sheet with a high flatness to pressure the single glass or laminated structure; and heating and annealing the single sheet glass or laminated structure to flatten the same. The end side of the flatten glass substrate is treated with a treating solution containing a hydrofluosilicic acid.

Abstract: A glass substrate manufacturing method advantageously applicable to magnetic recording disk glass substrates, LCD glass substrates, photomask glass substrates, or optical memory glass substrates. The glass substrate is formed by chemically strengthening a glass substrate by immersing the glass substrate in a chemical reinforcement solution heated and then ion exchanging ions on the surface layer of the glass substrate with ions in the chemical reinforcement solution; removing the substrate from the chemical reinforcement solution and then annealing it to a temperature higher than the crystallization temperature of a molten salt; rapidly cooling the glass substrate at a rate at which the crystallization of the molten salt deposited on the surface of the glass substrate is prevented; and then cleaning the surface of the glass substrate.

Abstract: A method for manufacturing a magnetic recording disk including the steps of forming a film of solution on at least a principal surface of a sheet glass; the solution contains a water soluble inorganic material and a surface active agent; sandwiching both sides of a single sheet glass on which the film is formed or on a laminated structure of plural sheet glasses with a densified sheet with a high flatness to pressure the single glass or laminated structure; and heating and annealing the single sheet glass or laminated structure to flatten it. The end side of the flattened glass substrate is treated with a treating solution containing hydrofluosilicic acid.

Abstract: A glass substrate manufacturing method advantageously applicable to magnetic recording disk glass substrates, LCD glass substrates, photomask glass substrates, or optical memory glass substrates. This method includes the steps of forming a film of a solution on at least a principal surface of a sheet glass formed using a down-drawing method, the solution containing a water soluble inorganic material and a surface-active agent; sandwiching both sides of a single sheet glass on which the film is formed or of a laminated structure of plural sheet glasses with a densified sheet with a high flatness to pressure the single glass or laminated structure; and heating and annealing the single sheet glass or laminated structure to flatten the same. The end side of the flatten glass substrate is treated with a treating solution containing a hydrofluosilicic acid.