Hamamatsu-Photonics K.k.

Yasumasa Hamana

Takaaki Nagata

Kimitsugu Nakamura

Hajime Nishimura

Hiroyuki Watanabe

Daichi Masuko

Yoshihiro Ishigami

Daijiro Oguri

Kenshi Shimano

Hiroji Nishizawa

Toshikazu Matsui

A method of manufacturing a phosphor panel includes: forming a phosphor layer having a plurality of phosphor particles on an exit window; forming an organic film on the phosphor layer; forming a metal reflection film on the organic film; forming an oxide film on the metal reflection film; removing the organic film by firing; and forming an oxide film integrally covering a surface of the metal reflection film and surfaces of the phosphor particles by atomic layer deposition.

Method for producing phosphor panel, phosphor panel, image intensifier and scanning-type electronic microscope

The present embodiment relates to an electron multiplier having a structure configured to suppress and stabilize a variation of a resistance value in a wider temperature range. The electron multiplier includes a resistance layer sandwiched between a substrate and a secondary electron emitting layer and configured using a Pt layer two-dimensionally formed on a layer formation surface which is coincident with or substantially parallel to a channel formation surface of the substrate. The resistance layer has a temperature characteristic within a range in which a resistance value at &#x2212;60&#xb0; C. is 10 times or less, and a resistance value at +60&#xb0; C. is 0.25 times or more, relative to a resistance value at a temperature of 20&#xb0; C.

Electron multiplier that suppresses and stabilizes a variation of a resistance value in a wide temperature range

The present embodiment relates to an electron multiplier having a structure configured to suppress and stabilize a variation of a resistance value in a wider temperature range. In the electron multiplier, a resistance layer sandwiched between a substrate and a secondary electron emitting layer formed of an insulating material includes a metal layer in which a plurality of metal particles formed of a metal material whose resistance value has a positive temperature characteristic are two-dimensionally arranged on a layer formation surface, which is coincident with or substantially parallel to a channel formation surface of the substrate, in the state of being adjacent to each other with a part of the first insulating material interposed therebetween, the metal layer having a thickness set to 5 to 40 angstroms.

Electron multiplier having resistance value variation suppression and stablization

A microchannel plate is provided with a substrate including a front surface, a rear surface, and a side surface, a plurality of channels penetrating from the front surface to the rear surface of the substrate, a first film provided on at least an inner wall surface of the channel, a second film provided on at least a part of the first film, and electrode layers provided on the front surface and the rear surface of the substrate. The first film is made of MgO, the second film is made of SiO, and the second film is thinner than the first film.

Microchannel plate and electron multiplier tube with improved gain and suppressed deterioration

A transmissive photocathode includes a light transmitting substrate that has a first surface on which light is incident and a second surface which emits light incident from a side of the first surface, a photoelectric conversion layer that is provided on the second surface side of the light transmitting substrate and converts the light emitted from the second surface into photoelectrons, a light transmitting conductive layer that is provided between the light transmitting substrate and the photoelectric conversion layer and is composed of a single-layered graphene, and a thermal stress alleviation layer that is provided between the photoelectric conversion layer and the light transmitting conductive layer and has light transmissivity. A thermal expansion coefficient of the thermal stress alleviation layer is smaller than a thermal expansion coefficient of the photoelectric conversion layer and larger than a thermal expansion coefficient of the graphene.

Transmissive photocathode and electron tube

The present embodiment relates to an electron multiplier having a structure configured to suppress and stabilize a variation of a resistance value in a wider temperature range. In the electron multiplier, a resistance layer sandwiched between a substrate and a secondary electron emitting layer comprised of an insulating material is configured using a single metal layer in which a plurality of metal particles comprised of a metal material whose resistance value has a positive temperature characteristic are two-dimensionally arranged on a layer formation surface, which is coincident with or substantially parallel to a channel formation surface of the substrate, in the state of being adjacent to each other with a part of the first insulating material interposed therebetween.

Electron multiplier

A microchannel plate is provided with a substrate including a front surface, a rear surface, and a side surface, a plurality of channels penetrating from the front surface to the rear surface of the substrate, a first film provided on at least an inner wall surface of the channel, a second film provided on the first film, and electrode layers provided on the front surface and the rear surface of the substrate. The first film is made of AlO. The second film is made of SiO. The first film is thicker than the second film.

Microchannel plate and electron multiplier

A transmission mode photocathode comprises: an optically transparent substrate having an outside face to which light is incident, and an inside face from which the light incident to the outside face side is output; a photoelectric conversion layer disposed on the inside face side of the optically transparent substrate and configured to convert the light output from the inside face into a photoelectron or photoelectrons; and an optically-transparent electroconductive layer comprising graphene, and disposed between the optically transparent substrate and the photoelectric conversion layer.

Transmission mode photocathode

In an electron tube, an atomic layer deposition method is used to form an electrical resistance film having a stacked structure of electrically insulating layers and electrically conductive layers or a mixed structure of an electrically insulating material and an electrically conductive material, so as to cover the whole of an inner wall surface and an outer wall surface of a second envelope. By use of the atomic layer deposition method, the firm and fine electrical resistance film with a desired resistance can be formed on an insulation surface, without containing a material such as a binder. When the electrical resistance film is provided with slight electrical conductivity, it can suppress occurrence of withstand voltage failure due to electrification of the insulation surface or the like and realize stability of withstand voltage characteristics.

Electron tube

In an electron tube, an electrical resistance film having a stacked structure of electrically insulating layers and electrically conductive layers is formed on holding surfaces of bases in insulating substrates. This electrical resistance film is made as a firm and fine film with a desired resistance by use of an atomic layer deposition method, which can suppress electrification of the bases comprised of an insulating material. This makes it feasible to stably maintain withstand voltage characteristics.

In a micro-channel plate, an electron emission film and an ion barrier film formed on a substrate are integrally formed by the same film formation step. In this structure, the electron emission film and the ion barrier film are made as continuous and firm films and the ion barrier film can be made thinner. Since the ion barrier film is formed on the back side of an organic film, the organic film is exposed during removal of the organic film. This prevents the organic film from remaining and thus suppresses degradation of performance of the ion barrier film due to the residual organic film, so as to suppress ion feedback from the micro-channel plate and achieve a sufficient improvement in life characteristics of an image intensifier.

Micro-channel plate, method for manufacturing micro-channel plate, and image intensifier

The present invention aims at providing a photocathode which can improve various characteristics. In a photocathode, an intermediate layer, an underlayer, and a photoelectron emission layerare formed in this order on a substrate. The photoelectron emission layercontains Sb and Bi and functions to emit a photoelectron in response to light incident thereon. The photoelectron emission layercontains 32 mol % or less of Bi relative to SbBi. This can dramatically improve the linearity at low temperatures.

Growing community of inventors

Hamamatsu, Japan

Yasumasa Hamana