摘要:
A package of the present invention has a laminate structure of a plurality of ceramic layers, and includes a cavity for housing a light emitting element. A mount surface is defined on a side surface parallel with the depth direction of the cavity. A pair of external electrodes each including a charged electrode portion and a coated electrode portion are formed over the entire length in the laminating direction at two corners defined by intersection of the mount surface and two side surfaces perpendicular to the mount surface. When the package is mounted, a pair of charged electrode portions and a pair of coated electrode portions are soldered to a surface of a substrate.
摘要:
A package for an electron element comprises: a base substrate made of ceramic; a frame body made of ceramic arranged on a top surface of the base substrate and provided therein with a cavity for accommodating the electron element; a via formed in the base substrate below the cavity, penetrating the base substrate from the top surface to a bottom surface thereof and filled with a thermally-conductive material; and a projecting part formed on an inner wall of the via and projecting toward a center of the via. The projecting part has a length along a direction perpendicular to a penetration direction of the via not less than a thickness along the penetration direction. An electronic component comprises the package and the electron element mounted thereon. The electron element is accommodated in the cavity defined inside the frame body of the package and arranged above the via.
摘要:
A package of the present invention has a laminate structure of a plurality of ceramic layers, and includes a cavity for housing a light emitting element. A mount surface is defined on a side surface parallel with the depth direction of the cavity. A pair of external electrodes each including a charged electrode portion and a coated electrode portion are formed over the entire length in the laminating direction at two corners defined by intersection of the mount surface and two side surfaces perpendicular to the mount surface. When the package is mounted, a pair of charged electrode portions and a pair of coated electrode portions are soldered to a surface of a substrate.
摘要:
A process to avoid or limit corrosion at the junction of two piping comprising devices welded together, said piping comprising devices being adapted to flow corrosive gases through them, said process comprising the steps of:a) providing a first piping comprising device and connecting it to an inert gas source;b) purging it with an inert gas comprising substantially not more than 10 ppb of an oxidizing gas selected from the group consisting of oxygen, carbon dioxide, water vapor or mixtures thereof, said inert gas flowing from a first opening to a second opening of said piping comprising device;c) providing a second pipe comprising device in flow communication with the first one, while continuing to purge the first piping comprising device;d) welding the two piping comprising devices, said welding being carried out under an inert gas atmosphere; ande) repeating steps c and d if necessary.
摘要:
An electronic device of the present invention includes: a base made of a ceramic material; an electronic device element arranged in a central area of the upper surface of the base, in a way that the electronic device element is placed on a first heat transfer layer; a first heat dissipation layer formed in a central area of the lower surface of the base; a plurality of thermal vias arranged in the base, and which connects the first heat transfer layer and the first heat dissipation layer; and a second heat transfer layer buried in the base, the second heat transfer layer crossing the plurality of thermal vias, while extending from a position above a central area of the lower surface of the base to a position above a peripheral area of the lower surface of the base.
摘要:
A method of manufacturing a surface acoustic device that has a surface acoustic wave filter including comb-like electrodes, electrode pads, and wiring patterns formed on a joined substrate produced by joining a piezoelectric substrate and a supporting substrate to each other. This method includes the steps of: activating at least one of the joining surfaces of the piezoelectric substrate and the supporting substrate; and joining the piezoelectric substrate and the supporting substrate in such a manner that the activated joining surfaces face each other.
摘要:
A table for a wafer polishing apparatus having superior heat-resistant, anti-thermal-shock, and anti-abrasion characteristics and capable of increasing the diameter of a semiconductor wafer while improving the quality of the wafer. The table (2) includes a plurality of superimposed bases (11) each of which is formed of silicide ceramic or carbide ceramic. The bases (11) are joined together by an adhesive layer (14). A fluid passage (12) is formed in a joining interface between the bases (11).
摘要:
A table for a wafer polishing apparatus having superior heat-resistant, anti-thermal-shock, and anti-abrasion characteristics and capable of increasing the diameter of a semiconductor wafer while improving the quality of the wafer. The table includes a plurality of superimposed bases each of which is formed of silicide ceramic or carbide ceramic. The bases are joined together by an adhesive layer. A fluid passage is formed in a joining interface between the bases.
摘要:
A table for a wafer polishing apparatus having superior heat-resistant, anti-thermal-shock, and anti-abrasion characteristics and capable of increasing the diameter of a semiconductor wafer while improving the quality of the wafer. The table includes a plurality of superimposed bases each of which is formed of silicide ceramic or carbide ceramic. The bases are joined together by an adhesive layer. A fluid passage is formed in a joining interface between the bases.
摘要:
A molding apparatus of a glass material according to the present invention is characterized by containing means for holding a glass material and a molding die in contact with each other, means for heating the glass material and the molding die, and means for applying a voltage across the glass material and the molding die, in which press-molding is performed by electrostatic attraction acting between a surface of the glass material and a surface of the molding die. Further, a molded product of a glass material according to the present invention is characterized by including an alkali metal as a component, in which a concentration of the alkali metal is lowered in vicinity of a surface to be molded as compared with that of a glass base material.