摘要:
A plasma treatment apparatus is provided, which enables to increase a treatment area and provide good treatment uniformity. This apparatus comprises a pair of electrode plates having a plurality of through holes and an insulating plate having a plurality of through holes. The insulating plate is disposed between the electrode plates such that positions of the through holes of the electrode plates correspond to the positions of the through holes of the insulating plate. A plurality of discharge spaces are formed by the through holes of the electrode plates and the through holes of the insulating plate. By applying a voltage between the electrode plates, while supplying a plasma generation gas into the discharge spaces, plasmas are generated simultaneously in the discharge spaces, and sprayed on an object to efficiently perform a large-area, uniform plasma treatment.
摘要:
A coil spring 60 is provided in an empty room (inside of a fixing roller 50) of a main body 52 of a roller. The coil spring 60 is in contact with an inside wall 52a surrounding the empty room of the roller main body 52 and pushes the inside wall 52a outward. The coil spring 60 and the inside wall face 52a are coated with a black film 66 except the contact portion 62 of the coil spring 60 and the inside wall 52a.
摘要:
A plasma treatment apparatus and a plasma treatment method having the capability of uniformly treating an object with plasma at a high treatment speed. This apparatus includes a tubular vessel having a laterally elongated cross section, a pair of electrodes arranged such that electric flux lines develop substantially in an axial direction of the tubular vessel when one of an AC voltage and a pulse voltage is applied between the electrodes, a gas supply for supplying a streamer generation gas into the tubular vessel, a power source for applying the voltage between the electrodes to generate plural streamers of the gas in the tubular vessel, and a plasma uniformity mechanism for making the plural streamers uniform in a lateral direction of the laterally elongated cross section of the tubular vessel to provide the plasma from one end of the tubular vessel.
摘要:
A plasma treatment apparatus can generate atmospheric pressure plasma with reliability by help of an ignition electrode to facilitate starting the apparatus without using an expensive impedance matching device. The apparatus comprises a plasma-generation chamber having an aperture from which the plasma blows out, a gas supply unit for supplying a gas for plasma generation into the chamber, a pair of electrodes, a power source for applying an AC electric field between the electrodes to maintain the plasma in the chamber, a pulse generator for providing a pulse voltage, and the ignition electrode for applying the pulse voltage to the gas supplied in the chamber to generate the plasma.
摘要:
A plasma treatment apparatus capable of efficiently performing a plasma treatment to a large area of an object while preventing the occurrence of streamer discharge is provided. The apparatus includes at least one pair of electrodes, gas supply unit for supplying a gas for plasma generation to a discharge space defined between the electrodes, and an electric power supply for applying an AC voltage between the electrodes to generate plasma of the gas for plasma generation in the discharge space. At least one of the pair of electrodes has a dielectric layer at an outer surface thereof. At least one of the pair of electrodes has a curved surface jutting into the discharge space. It is preferred that the electrodes are of a cylindrical structure. In this case, it is particularly preferred that the plasma treatment apparatus further includes a coolant supply unit for supplying a coolant to the interior of the electrodes to reduce an electrode temperature during the plasma treatment.
摘要:
A method for preparing a piezoelectric or dielectric ceramic sheet by firing a shaped body made of a piezoelectric or dielectric ceramic powder while the shaped body is sandwiched between substrates. The method results in a significant improvement in the degree of displacement of a piezoelectric ceramic and significantly decreased warpage of the shaped body during sintering.
摘要:
A laminated piezoelectric transducer, comprising a laminate of a plurality of piezoelectric plates with paste electrodes inserted therebetween and bonding the plates together. Rows of metal extrusions are made by electroless plating onto the paste electrodes on the peripheral outer surface of the laminate. Each row of the metal extrusions is formed onto and electrically connected to alternate paste electrodes, so that by electrically connecting each row of the metal extrusions, the laminate of the piezoelectric plates is electrically connected in parallel. This laminated piezoelectric transducer allows the formation of the paste electrodes on the entire or at least substantially the entire main surfaces of the piezoelectric plates, and eliminates the need for the usual metal plate electrodes inserted between the piezoelectric plates.
摘要:
There is disclosed a semiconductor device comprising at least first and second semiconductor layers positioned to form a hetero-junction therebetween, such a hetero-junction being adapted to form a channel, means for controlling carriers, and source and drain areas on opposite edges of the channel, wherein the first and second semiconductor layers formed between the source and drain regions have an area containing only 10.sup.16 cm.sup.-3 or less of an impurity; the first semiconductor layer has a wider forbidden band than that of the second semiconductor layer; and further including at least one semiconductor layer having a higher activation efficiency of impurities than that of the first semiconductor layer, with such at least one semiconductor layer being located on the side of the first semiconductor layer not in contact with the second semiconductor layer. A multi-quantum well structure may be used as the higher impurity activation efficiency semiconductor layer. The electrical resistance in the semiconductor area constituting the source and drain regions can be lowered by utilizing such a higher impurity activation efficiency semiconductor layer.
摘要:
In a semiconductor device having at least a first semiconductor layer and a second semiconductor layer which are arranged so as to form a heterojunction, an edge of a conduction band of the first semiconductor layer being positioned lower in energy than an edge of a conduction band of the second semiconductor layer in the vicinity of the heterojunction, at least one pair of electrodes which are electronically connected with the first semiconductor layer, and means to control carriers induced in the vicinity of the heterojunction; a semiconductor device characterized in that a low impurity concentration region is comprised in at least the part of the first semiconductor layer between the pair of electrodes, that a region adjoining each of the pair of electrodes is a high impurity concentration region, and that at least one layer containing an impurity which has a conductivity type identical or opposite to that of an impurity contained in the aforementioned regions is comprised in the first semiconductor layer.
摘要:
A medium-scale IP telecommunications network is configured in a low-cost optical network with good reliability and expandability. A physical configuration example has a center node 2-1 and eight local nodes 2-11 through 2-18 connected in one OADM ring 2-21/2-22. The logical configuration is a star configuration with the central node 2-1 at its origin with all traffic passing through the center node 2-1. The local nodes 2-11 through 2-18 are connected to the central node 2-1 by wavelength-unit optical channels or optical paths λ1 through λ8. Channels are added as required. Initially, for example, the center node 2-1 and the local node 2-5 are connected by λ5, but λ13 can added when the need arises. Since the logical star network is limited to approximately two add/drop optical channels at local nodes, costs are reduced by using inexpensive filters (e.g., dielectric interference film filters or fiber Bragg reflectors) that are capable of extracting only the specific wavelength of the optical channel. High reliability is provided through the use of optical switches for correction of fiber transmission path failures.