Abstract: An X-ray tube 1 in which a cathode 73 is heated to emit electrons 80, and the electrons 80 are bombarded against an anode target 32, thereby generating X-rays 81, includes a stem substrate 4 mounted on an opening 22 of a container 21 housing the cathode 73, a plurality of pins 5 extending through the insulating substrate 4 and adapted to supply a voltage into the container 21, and pin covers 6 mounted on the pins 5 in the container 21 and arranged at positions away from a surface of the stem substrate 4 to cover base portions of the pins 5.

Abstract: A hood electrode attached to a tip portion of a target is provided with an electron passage port widening on the side opposite from an x-ray emitting window, so that electrons emitted from an electron gun are made incident on the front end face of a target at a position on the x-ray emission side, whereby the distance between the x-ray generating position and the x-ray emitting window can be shortened.

Abstract: An X-ray tube 1 in which a cathode 73 is heated to emit electrons 80, and the electrons 80 are bombarded against an anode target 32, thereby generating X-rays 81, includes a stem substrate 4 mounted on an opening 22 of a container 21 housing the cathode 73, a plurality of pins 5 extending through the insulating substrate 4 and adapted to supply a voltage into the container 21, and pin covers 6 mounted on the pins 5 in the container 21 and arranged at positions away from a surface of the stem substrate 4 to cover base portions of the pins 5.

Abstract: An X-ray tube 1 includes spacer 8 which is cylindrical so it does not block electrons 80 directed from a grid electrode 72 toward a focusing electrode 25, and which has one end 8b fixed to the grid electrode 72 and the other end 8c abutting against the focusing electrode 25. The distance between the grid electrode 72 and focusing electrode 25 is set to a predetermined distance by the spacer 8.

Abstract: The object of the invention is to provide a bonding method for brazing an amorphous carbon (AC) material to a metal material or a ceramic material, and to provide an electron tube device having an input/output window made of the amorphous carbon material. The surface of the amorphous carbon (AC) material is roughened to form an irregularity. A brazing material is sandwiched between the amorphous carbon material and a metal material or ceramic material. The resultant structure is heated to braze the amorphous carbon material to the metal material or ceramic material. The electron tube device includes a sealed vessel having an opening portion, a peripheral portion of which is made of a metal material or a ceramic material. The electron tube device further includes a window, made of an amorphous carbon material and bonded to the peripheral portion of the opening portion with a brazing material, and having irregularity on a surface around the opening portion.

Abstract: The object of the invention is to provide a bonding method for brazing an amorphous carbon (AC) material to a metal material or a ceramic material, and to provide an electron tube device having an input/output window made of the amorphous carbon material. The surface of the amorphous carbon (AC) material is roughened to form an irregularity. A brazing material is sandwiched between the amorphous carbon material and a metal material or ceramic material. The resultant structure is heated to braze the amorphous carbon material to the metal material or ceramic material. The electron tube device includes a sealed vessel having an opening portion, a peripheral portion of which is made of a metal material or a ceramic material. The electron tube device further includes a window, made of an amorphous carbon material and bonded to the peripheral portion of the opening portion with a brazing material, and having irregularity on a surface around the opening portion.