摘要:
There is provided an elongating method of an optical fiber base material which can easily correct a distorted portion of an optical fiber base material with it being possible to elongate the optical fiber base material to reduce its diameter. According to such an elongating method, in an elongating process of elongating an optical fiber base material by heating the optical fiber base material in a heating furnace so that a diameter of the optical fiber base material is reduced, before the optical fiber base material is elongated from an end thereof, a distorted portion of the optical fiber base material is connected by being heated to be softened in the heating furnace. To do so, the optical fiber base material is attached to a hanging mechanism so as to be hung in an electric furnace, the distorted portion of the optical fiber base material is heated to be softened. The elongation is stated after a difference between the elongation axis and an end of one of the optical fiber base material and the dummy rod attached to the optical fiber base material is reduced to be 10 mm or less. Here, the difference may be detected by using a noncontact position detecting apparatus, which may be one of a laser measuring device and an image processing apparatus.
摘要:
There is disclosed a heating element 10 comprising: at least a heat-resistant base member 1; a conductive layer 3 having a heater pattern 3a formed on the heat-resistant base member; a protection layer 4 with an insulating property formed on the conductive layer; and a corrosion-resistant layer 4p that is an oxide having an oxygen amount of stoichiometric ratio or less formed on the protection layer. There can be provided a heating element in which a corrosion-resistant layer whose resistivity or hardness is controlled is formed on a protection layer and through which the corrosive gas is difficult to be transmitted even under an environment of a high temperature and a corrosive gas and by which degradation due to corrosion of a conductive layer, particularly, a power-supply-terminal portion can be avoided and additionally which can fulfill a high function as an electrostatic chuck even when having a chuck pattern and which has a long operation life and is capable of being produced at a low cost.
摘要:
The invention provides an electrostatic chuck in which a workpiece-chucking surface is made flat. An electrostatic chuck with a built-in electric heating means comprises a base plate formed of carbon or a carbon-based composite material and, successively formed on one surface of the base plate, an insulating layer (a1), an electroconductive layer (a2) to serve as a chucking electrode and an dielectric layer (a3) to form a workpiece-chucking surface and, successively formed on the other surface of the base plate, an insulating layer (b1) and an electroconductive layer (b2) to serve as an electric heater element, the electrostatic chuck improved in that the workpiece-chucking surface of the electrostatic chuck and an opposite surface thereof are warped to have a relationship selected from concavo-convex and convexo-concave, and in that the warping of the surfaces is in a manner such that the workpiece-chucking surface of the dielectric layer is rendered flat when the opposite surface of the electrostatic chuck is fastened to a machine.
摘要:
The present invention is a corrosion-resistant multilayer ceramic member including at least: a ceramic substrate, an electrode layer formed on the ceramic substrate, a feeding member that supplies electricity to the electrode layer, and a protection layer that prevents corrosion; wherein the electrode layer is formed on one surface or both surfaces of the ceramic substrate, the feeding member is connected with the electrode layer, the protection layer is formed with a thickness of 0.02 mm or above and 10 mm or less on that surface of the ceramic substrate where the electrode layer is formed so as to cover the electrode layer, and the protection layer contains any one of silicon oxide, rare-earth oxide, aluminum nitride, and aluminum oxide as a main component. Hereby, there is provided a corrosion-resistant multilayer ceramic member that has excellent corrosion resistance and a long life duration even when exposed to a corrosive gas.
摘要:
The present invention relates to a corrosion-resistant multilayer ceramic member consisting at least of: a ceramic support substrate; an electrode layer formed on the ceramic support substrate; a power-supply member connected to the electrode layer; an insulating protection layer formed on the ceramic support substrate to cover the electrode layer; and a ceramic protection substrate of which at least a part is provided on the insulating protection layer. Thereby, there is provided a long-life corrosion-resistant multilayer ceramic member excellent in corrosion resistance even when exposed to a corrosive gas.
摘要:
There is disclosed a heating element 10 comprising: at least a heat-resistant base member 1; a conductive layer 3 having a heater pattern 3a formed on the heat-resistant base member; a protection layer 4 with an insulating property formed on the conductive layer; and a corrosion-resistant layer 4p that is an oxide having an oxygen amount of stoichiometric ratio or less formed on the protection layer. There can be provided a heating element in which a corrosion-resistant layer whose resistivity or hardness is controlled is formed on a protection layer and through which the corrosive gas is difficult to be transmitted even under an environment of a high temperature and a corrosive gas and by which degradation due to corrosion of a conductive layer, particularly, a power-supply-terminal portion can be avoided and additionally which can fulfill a high function as an electrostatic chuck even when having a chuck pattern and which has a long operation life and is capable of being produced at a low cost.
摘要:
Provided is a processing method and a processing apparatus of a glass base material, with which a welding process of a large glass base material and a process of forming ends of the glass base material into spindle shapes are easily and safely performed without causing core deviation or causing an accident of falling off of the glass base material. Provided is a processing method of processing a glass base material for an optical fiber using a processing apparatus, the processing apparatus including: a pair of rotatable chucks that directly or indirectly grasp respective ends of the glass base material in an axial direction of the glass base material and that are capable of performing relative displacement in an opposing direction; and a burner for heating the glass base material that is movable along the axial direction of the glass base material being grasped, the processing method being characterized by processing the glass base material while preventing the glass base material from being brought into a cantilever state by always holding or supporting the glass base material at two or more points. The processing apparatus includes at least one midway holding device that holds or supports midway part of the glass base material.
摘要:
An object of the present invention is to provide an optical fiber base material and a connection processing method and apparatus capable of simply connecting ends of an optical fiber base material and a dummy member with a large diameter at short times without breaking and crack in a connected portion when heating and melting the ends of them to weld and connect both. A connection processing method of an optical fiber base material 1 for heating and melting ends of an optical fiber base material 1 and a dummy member 2 or ends of two optical fiber base materials 1 or ends of two dummy members 2 to weld and connect both. The connection processing method includes: gripping an end of at least one of the bodies to be welded with gripping mechanism to face both with each other; selecting the interval between both the bodies to be welded within 1 to 20 mm; and heating and melting ends of both the bodies to be welded to weld and connect both.
摘要:
The present invention provides an electrostatic chuck with a built-in heater, with which the apparatus can start operation rapidly at the wafer chucking surface, and a uniform temperature distribution can be rapidly established over the wafer. Gas-escape grooves which communicate with the outer periphery are provided to one or both sides of the electrostatic chuck. The chucking function of the electrostatic chuck with a built-in heater of the present invention is exhibited by stacking an insulating underlayer, an electroconductive layer, and an insulating topmost layer by the CVD method on a heat-conductive base body. It is preferable that the gas-escape groove has a cross section smoothly dropping off from the flat surface area of the insulating topmost layer to the bottom of the groove, and that the gas-escape groove has a width of 1 to 3 mm and a depth of 0.03 to 0.2 mm with a spacing between grooves of 5 to 15 mm.