Radiation generating tube, radiation generating apparatus, radiography system and manufacturing method thereof
AssigneeCanon Kabushiki Kaisha
InventorsKoji Yamazaki, Yasue Sato, Kazuyuki Ueda
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Abstract
The present invention relates to a radiation generating tube. The radiation generating tube includes an envelope including an insulating tubular member having at least two openings, a cathode connected to one of the openings of the insulating tubular member, and an anode connected to the other of the openings of the insulating tubular member. At least one of the cathode and the anode and the insulating tubular member are bonded at a bonded portion with an electrically conductive bonding member; and the bonded portion bonded with the electrically conductive bonding member is coated with a dielectric layer.
Claims30
A radiation generating tube comprising:
- an envelope including an insulating tube having a pair of openings, a cathode connected to one of the pair of openings of the insulating tube, and an anode connected to the other of the pair of openings of the insulating tube;
- an electron emitting source connected to the cathode;
- and
- a target connected to the anode,
- wherein the insulating tube and at least any one of the cathode and the anode are bonded via a conductive bonding member so as to form a triple junction at a boundary between the insulating tube, the conductive bonding member, and vacuum inside the envelope;
- and
- wherein the boundary is coated with a dielectric layer without at least any of the one of the cathode and the anode intervened therebetween so as to relax electric field concentration due to the triple junction.
A radiation generating tube comprising:
- an envelope including an insulating tube having a pair of openings, a cathode connected to one of the pair of openings of the insulating tube, and an anode connected to the other of the pair of openings of the insulating tube;
- an electron emitting source connected to the cathode;
- and
- a target connected to the anode,
- wherein the insulating tube and at least any one of the cathode and the anode are bonded via a conductive bonding member so as to form a proximal electrical end which is the closest end in the conductive bonding member in a distance to the other of the cathode and the anode, and
- wherein the proximal electrical end is coated with a dielectric layer so as to relax electric field concentration occurring at the proximal electrical end.
Dependencies are inferred from the claim text.