摘要:
In an ion beam apparatus a structure for controlling the surface potential of the target comprising an electron source adjacent to the beam for providing electrons to the beam and means between the target and source for inhibiting rectilinear radiations, i.e., electron and other particle and photon radiations between said source and said target. This prevents heating of the target by the electron source and cross-contamination between the source and the target. A further structure is provided for the measurement of the ion beam current while controlling said surface potential of the target which includes: walls adjacent to and electrically insulated from the target and surrounding the beam whereby the walls and target provide a Faraday Cage, means for introducing variable quantities of electrons into the beam within the Faraday Cage, means for measuring the target current, means for combining and measuring the target and wall currents to provide said ion beam current measurement and means for varying the quantities of introduced electrons to control the target current and thereby the target surface potential.
摘要:
Process and apparatus for use in extracting negative ions from a plasma which is particularly useful in reactive ion etching of metals, silicon and oxides and nitrides of silicon in the manufacture of semiconductor devices. A magnetic field is employed in the apparatus and, herein, is created by a novel grid, through which negative ions pass to a surface, such as one to be etched, while free electrons are prevented from passing through the grid and out of the plasma. The novel process utilizes negative ions which have a large fraction in the atomic state.
摘要:
In an apparatus for bombarding a target with a beam of ions, an expedient is provided for maintaining the beam line and target under vacuum of 2.times.10.sup.-4 Torr. or lower pressures. The apparatus includes a mass separator, e.g., analyzing magnet adapted to provide selected ions which are to be formed into the desired beam with a trajectory along a selected axis: the target is positioned along this selected axis; the apparatus further includes: a housing extending from the mass separator to the target to enclose the axis and target within a chamber, beam defining means within said chamber traversing said axis and impeding the flow of gas through said chamber, said defining means having a beam defining opening therein at said axis to permit the passage of a selected portion of the beam toward the target, and vacuum drawing means connected to said chamber through an opening in said housing crossing said beam defining means whereby said drawing means removes gas from both sides of said beam defining means.
摘要:
A plurality of magnetic pole pieces are arranged around the external wall of a high temperature plasma confining structure. The pole pieces are positioned between permanent magnets spaced from one another and the confining structure by distances calculated to produce a minimum field toward the center of the structure with an effective containing field around the periphery of the structure. The magnets and the pole pieces are cooled. An odd number of poles are employed such that the missing pole appears as a virtual pole at the extraction slit used for forming an ion beam for ion implantation. The resulting small package multipole plasma containment functions to provide higher beam current, longer source lifetime, higher voltage stability and reduces maintenance and cleaning operations, with the permanent magnets protected from high temperature and corrosive gases.
摘要:
An apparatus for depositing a monocrystalline epitaxial layer of semiconductor material, e.g., silicon containing selected conductivity-determining impurities, on a semiconductor substrate comprising directing a beam of ions of said semiconductor material at the surface of the semiconductor substrate at an energy level below 0.5 Kev., and simultaneously directing a beam of the conductivity-determining impurity ions at at least a portion of the substrate surface whereby a layer of semiconductor material containing said conductivity-determining impurities is formed on said surface, and heating said layer to a temperature of at least 550.degree. C. to render said layer monocrystalline. The beams of semiconductor ions and of conductivity-determining impurity ions are preferably maintained at a high current density of at least 1 ma/cm.sup.2 at the surface of said semiconductor substrate even with a preferable relatively broad beam having diameters of up to 15 cm. Such wide beams are desirably achieved by ion beam apparatus having a high intensity source with a multi-aperture source exit plate.
摘要翻译:一种用于在半导体衬底上沉积半导体材料的单晶外延层(例如含有选定的导电率确定杂质的硅)的装置,包括以0.5kev以下的能级指向半导体衬底的表面处的所述半导体材料的离子束 并且同时在衬底表面的至少一部分处引导导电性确定杂质离子的束,由此在所述表面上形成含有所述导电性确定杂质的半导体材料层,并将所述层加热至 至少550℃以呈现所述层单晶。 半导体离子束和电导率确定性杂质离子的光束优选在所述半导体衬底的表面处保持在至少1m 2 / cm 2的高电流密度,即使具有直径最大为15cm的优选的相对宽的光束也是如此。 这种宽光束期望地由具有多孔光源出射板的具有高强度光源的离子束装置实现。
摘要:
A method and apparatus for depositing a monocrystalline epitaxial layer of semiconductor material, e.g., silicon containing selected conductivity-determining impurities, on a semiconductor substrate comprising directing a beam of ions of said semiconductor material at the surface of the semiconductor substrate at an energy level below 0.5 Kev., and simultaneously directing a beam of the conductivity-determining impurity ions at at least a portion of the substrate surface whereby a layer of semiconductor material containing said conductivity-determining impurities is formed on said surface, and heating said layer to a temperature of at least 550.degree. C. to render said layer monocrystalline. The beams of semiconductor ions and of conductivity-determining impurity ions are preferably maintained at a high current density of at least 1 ma/cm.sup.2 at the surface of said semiconductor substrate even with a preferable relatively broad beam having diameters of up to 15 cm. Such wide beams are desirably achieved by ion beam apparatus having a high intensity source with a multi-aperture source exit plate.
摘要翻译:一种用于在半导体衬底上沉积半导体材料的单晶外延层(例如含有选定的导电率确定杂质的硅)的方法和装置,包括在半导体衬底的表面处将半导体材料的离子束引导到低于 并且在所述衬底表面的至少一部分同时引导导电率确定杂质离子的束,由此在所述表面上形成含有所述导电性确定杂质的半导体材料层,并将所述层加热至温度 至少550℃以使所述层单晶。 半导体离子束和电导率确定性杂质离子的光束优选在所述半导体衬底的表面处保持在至少1m 2 / cm 2的高电流密度,即使具有直径最大为15cm的优选的相对宽的光束也是如此。 这种宽光束期望地由具有多孔光源出射板的具有高强度光源的离子束装置实现。
摘要:
In an ion implantation apparatus, a beam defining member such as the acceleration plate is constructed such that the member is maintained at a temperature above the condensation point of the vapor emanating from the source of charged particles, thereby preventing the vapor from condensing on the member and providing a self-cleaning effect.
摘要:
A plasma enhancing baffle plate is employed in conjunction with the anode of an RIE system to provide uniform silicon etching. The baffle plate is conductively coupled to and provided in relatively close proximity to the anode to form a constricted chamber region between anode and baffle plate. With the constricted chamber open to the RIE chamber through aperture means in the baffle plate the total surface area of the anode is increased, such that when the system is biased to operate in an RIE mode an increase in the generation of neutral etching species is effected. Various aperture arrangements may be employed to provide different patterns of neutral etching species generation, in accordance with the peculiar characteristics of the system employed.
摘要:
Watercraft hulls and parts thereof are disclosed which improve hydrodynamic performance for yachts, sailboards, and other craft. Drag at the transition from displacement mode to planing mode may be reduced to be the same or less than the minimum drag experienced in planing mode. Exemplary embodiments may include a bow with a center planing surface and tunnels to either side. The bow tunnels may each end in a step. At least part of the center planing surface may be cambered. A spoiler and/or interceptor may be provided at an aft end of a camber of a planing surface. For some hulls, the bow is followed by a main lift surface which is followed by a back lift surface (from stem to stern). In the back lift surface behind the main lift surface, a tunnel surface may be provided to add longitudinal stability.
摘要:
A winglet in a planing hull for sailboards with longitudinal length at least three times its transverse width, or a top slot that covers at least half the winglet area, and a forward slot and or a top slot, which allows dynamic lift from both the top and bottom surface of the winglet when the board is traveling at a transition speed between displacement mode and planing mode, but at high planing speed it does not normally have lift from the top surface of the winglet. This winglet may have a camber/slope step on the planing surface. In addition the transverse section of the nose of the hull can have the shape of an upside down wing.