摘要:
An electrical connector comprises a high voltage pad and a high voltage plate. When connected to another electrical connector, the two plates, which are at the same voltage as the pads, form a region of high voltage in which the field is low. The pads are positioned in that region. An electrostatic clamp of an EUV lithographic apparatus may have such a pad and plate, for connecting to the electrical connector. By placing the interconnection in a low field region, triple points (points of contact between a conductor, a solid insulator and a gas) may be present in that region.
摘要:
A vacuum device has an envelope and a getter assembly mounted within the envelope. The getter assembly includes a reservoir for containing getter material and a deflector having a surface located opposite the getter material and is oriented to deflect the getter material in a predetermined direction within the vacuum device. The deflector surface has raised and/or depressed portions, such as ribs or undulations, in the direction of diffusion of the getter material. These portions reduce the accumulation of getter material on the deflector during getterfiring, resulting in a much reduced likelihood that getter material particles may break loose from the deflector. By preventing loose particles within the vacuum device, the possibility of a short-circuit in the vacuum device is reduced.
摘要:
A cathode ray tube comprises a color selection electrode with a shadow mask fixed to a frame and put under tension. The frame comprises a bimetal element (or bimetal elements) which are constructed such that at a raised temperature the tension is released by reducing the distance between sides of the frame to which the mask is attached. The reduction in distance at the center of the sides exceeds, preferably by a factor 1.5 to 3, the reduction in distance at the corners of said sides.
摘要:
A color cathode ray tube comprises an electron gun and a deflection unit, the electron gun being arranged in a neck portion of an envelope, and the deflection unit being arranged around the envelope. The neck portion of the envelope includes a first part in which the electron gun is arranged. Behind this first part, the neck portion narrows (the outside diameter decreases). The deflection unit is at least partly provided around this narrowed part.
摘要:
A cathode ray tube includes an electron gun having a beam-shaping portion (20) for generating electron beams (7-9), a prefocusing system (30) of electrodes (31, 32) across which a prefocusing voltage is supplied during operation so as to form an electron-optical prefocusing lens, and a main lens system (40) of electrodes (32, 41) across which a main lens voltage is applied during operation so as to form an electron-optical main lens. The electrodes (31, 32, 41) are provided with securing means (48) for connection to an insulating supporting body (47) and with apertures (16) for passing the electron beams (7-9). Electrode (32) protrudes toward electrode (31) in such a way that the mutual distance (l2) between the two electrodes at the location of the apertures (16) therein is smaller than their mutual distance (l1) at the location of their respective securing means (48). The two electrodes (31, 32) are spaced apart at the location of the apertures (16) substantially at a distance limited by electrostatic breakdown.
摘要:
A picture display device comprises an evacuated envelope and is provided at a first side with an electroluminescent display screen and at an opposite side with an electron gun (6). Between the electron gun (6) and the display screen, the device comprises deflection means with which an electron beam generated by the electron gun (6) can be deflected during operation. The electron gun (6) has at least an electron beam-generating portion (20) and is provided with a main lens system (40) having a first electrode (41), a final electrode (45) and at least one intermediate electrode (42-44) across which a main lens voltage is gradually applied step-wise during operation so as to form an electron-optical main focusing lens. The gun is further provided with means for presenting a dynamic potential (V.sub.d) to at least an electrode (41) of the main lens system (40), which is the first electrode viewed in the direction of propagation of the electron beam (7-9). For an increased dynamic focusing, a coupling capacitor (50) is arranged at least between said first electrode (41) and the subsequent electrode (42) of the main lens system (40).
摘要:
Vacuum tube comprises a ceramic element and method of interconnecting a ceramic element and a conductive element. A conductive connection consisting of a first layer containing silver and a filler and a second layer containing silver, gold or copper is formed between the ceramic element and the conductive element. The two above-mentioned layers are bonded together by means of diffusion bonding.
摘要:
A color display tube which comprises a display window and a phosphor pattern provided on the display window, an emission system for producing a pattern of juxtaposed rows of electron beams correlated with the phosphor pattern, an array of strip-shaped deflection electrodes situated between the emission system and the display screen for deflecting electron beams, each deflection electrode extending between adjacent rows of the emission pattern, alternate deflection electrodes being a commonly connected first group, and the remaining deflection electrodes being a commonly connected second group, is characterized in that the deflection electrodes extend asymmetrically with respect to the rows of electron beams.
摘要:
An electrical connector comprises a high voltage pad and a high voltage plate. When connected to another electrical connector, the two plates, which are at the same voltage as the pads, form a region of high voltage in which the field is low. The pads are positioned in that region. An electrostatic clamp of an EUV lithographic apparatus may have such a pad and plate, for connecting to the electrical connector. By placing the interconnection in a low field region, triple points (points of contact between a conductor, a solid insulator and a gas) may be present in that region.
摘要:
A vacuum tube includes a ceramic element and a conductive element. A conductive connection consisting of a first layer containing silver and a filler and a second layer containing silver, gold or copper is formed between the ceramic element and the conductive element. The two above-mentioned layers are bonded together by means of diffusion bonding.