摘要:
In a method of diffusing gas into a CVD chamber, the gas is diffused through a diffusing means formed of grains of a material sintered together and formed such that the gas is allowed to escape through spaces between individual grains sintered together.
摘要:
There is provided a chemical vapor deposition apparatus comprising a structure defining a chamber having an area for horizontal positioning of a substrate, and having chamber walls for conducting a flow of gas across a surface of the substrate, said chamber having a gas inlet extending generally laterally across the width of the chamber structure; and a gas injector abutting the chamber structure adjacent said inlet, and including a plurality of gas supply passages, a gas inlet manifold connected to each of said passages, a separately adjustable metering valve apportioning flow through each of said passages, each of said passages having an outlet portion configured to cause the gas flow through the passage to diverge laterally into an expanded gas stream separated from adjacent streams, said injector further including walls that direct the gas streams into generally flat in edge-to-edge relation towards said chamber gas inlet, said chamber inlet being without partitions dividing the streams so that an edge of any one stream can mix with an edge of an adjacent stream.
摘要:
There is provided an apparatus for chemical vapor deposition, comprising: walls defining a deposition chamber having a deposition gas inlet at an upstream end and a gas outlet on a downstream end; a susceptor positioned in the chamber between the gas inlet and the gas outlet for receiving a semiconductor substrate for vapor deposition purposes; and a plate positioned in said chamber between the susceptor and said gas outlet, said plate extending across a substantial portion of the chamber, the chamber wall adjacent said plate being generally transparent to radiation energy, and said plate being a good absorber of radiation energy so that unused deposition gas will deposit more readily on the plate than on the chamber wall.
摘要:
There is provided a chemical vapor deposition apparatus comprising a structure defining a chamber having an area for horizontal positioning of a substrate, and having chamber walls for conducting a flow of gas across a surface of the substrate, said chamber having a gas inlet extending generally laterally across the width of the chamber structure; and a gas injector abutting the chamber structure adjacent said inlet, and including a plurality of gas supply passages, a gas inlet manifold connected to each of said passages, a separately adjustable metering valve apportioning flow through each of said passages, each of said passages having an outlet portion configured to cause the gas flow through the passage to diverge laterally into an expanded gas stream separated from adjacent streams, said injector further including walls that direct the gas streams into generally flat in edge-to-edge relation towards said chamber gas inlet, said chamber inlet being without partitions dividing the streams so that an edge of any one stream can mix with an edge of an adjacent stream.
摘要:
A reflector plate (100) is provided for scattering radiant heat energy in a semiconductor processing reactor chamber to achieve uniform temperature across a substrate to be processed. The surface (104) is characterized by a plurality of adjoining depressions (106) with substantially no planar sections among the depressions. The width to depth ratio for the depressions averages over 3:1. Crests separating the depressions define an angle of greater than about 60°, thus providing a relatively smooth texture for the reflecting surface. The reflecting surface is thus easy to clean. A method of manufacturing the reflector plate comprises removing material from a planar metal surface by ball-end milling. The depth of each depression and degree of overlap with adjacent depressions can randomly vary within selected ranges. A highly specular finish is then provided on the stippled surface by gold electroplating.
摘要:
An apparatus and method for rapidly and uniformly heating a workpiece (12) includes a plurality of walls defining a first chamber (20), a first source of radiation (44) for producing incident radiation on a first energy transfer surface of the workpiece (19), a holder for holding the workpiece in a workpiece plane in the chamber and a radiation absorbing surface on at least one wall of the chamber (22, 24, 26). The holder has an energy transfer surface, the energy surfaces of the holder and of the workpiece reflecting and emitting radiation in the chamber and the radiation absorbing surface absorbing non-incident radiation reflected and emitted from the energy transfer surfaces.
摘要:
A reflector array (25) employing a number of linear, tubular heater lamps (27) arranged in a circle concentric with the substrate (5) to be heated. Some of the lamps (27) have focusing reflectors (31) and the remainder have dispersive reflectors.
摘要:
In order to easily and accurately manufacture a micromachine comprising a member which is made of a single-crystalline material and having a complicated structure, an uppermost layer (1104) of a single-crystalline Si substrate (1102) whose (100) plane is upwardly directed is irradiated with Ne atom currents from a plurality of prescribed directions, so that the crystal orientation of the uppermost layer (1104) is converted to such orientation that the (111) plane is upwardly directed. A masking member (106) is employed as a shielding member to anisotropically etch the substrate (1102) from its bottom surface, thereby forming a V-shaped groove (1112). At this time, the uppermost layer (1104) serves as an etching stopper. Thus, it is possible to easily manufacture a micromachine having a single-crystalline diaphragm having a uniform thickness. A micromachine having a complicated member such as a diagram which is made of a single-crystalline material can be easily manufactured through no junction.
摘要:
A single wafer reactor (210) having a vented lower liner (284) for heating exhaust gas is disclosed. The apparatus includes a reaction chamber (212). A wafer support member (220) which divides the chamber into an upper (222) and lower portion (224) is positioned within the chamber (212). A gas outlet (232) for exhausting gas from the chamber (212) has a vent to exhaust gas from the lower portion (224) of the chamber (212) and an exhaust passage (300) opening to exhaust gas from the upper portion (222) of the chamber (212). Heated inert purge gas is fed from the lower chamber portion (224) through the vent at a rate so as to prevent the deposition gas from condensing in the exhaust passage (300).
摘要:
In order to produce a three-dimensional rod structure which extends in space with the aid of a laser-assisted chemical vapour deposition process, two laser beams (12, 13) are focused at a common focus (12a) in a vapour or fluid medium containing a compound which breaks down under the action of laser light to produce the substance which will form the rod structure. With this process, it is possible to create structures in space even from weakly absorbing, virtually transparent materials. In addition, the direction of growth of the structure can be accurately controlled.