摘要:
A process flow integration scheme employs one or more techniques to control stress in a semiconductor device formed thereby. In accordance with one embodiment, cumulative stress contributed by RTP of a nitride spacer and polysilicon gate, and subsequent deposition of a high stress etch stop layer, enhance strain and improve device performance. Germanium may be deposited or implanted into the gate structure in order to facilitate stress control.
摘要:
An optical waveguide is formed on a substrate by first depositing an undercladding layer over the substrate. At least one core is formed over the undercladding layer. An uppercladding layer is then formed over the cores with a high-density plasma process. Deposition of the uppercladding layer may proceed by flowing an oxygen-containing gas, such as O2, a silicon-containing gas, such as SiH4, and a fluorine-containing gas, such as SiF4, into a process chamber to produce a gaseous mixture. A high-density plasma, i.e. having a density of at least 1011 ions/cm3, is generated from the gaseous mixture and then used to deposit a fluorinated silicate glass layer.
摘要翻译:通过首先在衬底上沉积下封层,在衬底上形成光波导。 在下封层上形成至少一个芯。 然后用高密度等离子体工艺在芯上形成上层。 上层的沉积可以通过使诸如SO 2的含氧气体,例如SiH 4 O 3等含氧气体和含氟气体 气体,例如SiF 4 N,进入处理室以产生气态混合物。 从气体混合物产生高密度等离子体,即具有至少10 11 / cm 3的密度,然后用于沉积氟化硅酸盐玻璃层 。
摘要:
A method of depositing a film, such as a barrier layer, on a substrate using a gaseous mixture including a hydrocarbon-containing gas and a silicon-containing gas. Suitable hydrocarbon-containing gases include alkanes such as methane (CH4), ethane (C2H6), butane (C3H8), propane (C4H10), etc. Suitable silicon-containing gases include silanes such as monosilane (SiH4). The method generally comprises providing a suitable gaseous mixture to the chamber, generating a plasma from the gaseous mixture, and depositing a film onto the substrate using the plasma. In a preferred embodiment, the film is deposited in a high-density plasma chemical vapor deposition (HDP-CVD) system. The gaseous mixture typically includes a silicon containing gas, such as an alkane, and a hydrocarbon containing gas, such as a silane. Embodiments of the method of the present invention can integrated stack structures having overall dielectric constant of about 4.0 or less. Such a structure may include a barrier layer having a dielectric constant of 4.5 or less.
摘要:
High tensile stress in a deposited layer, such as a silicon nitride layer, may be achieved utilizing one or more techniques employed either alone or in combination. In one embodiment, a silicon nitride film having high tensile stress may be formed by depositing the silicon nitride film in the presence of a porogen. The deposited silicon nitride film may be exposed to at least one treatment selected from a plasma or ultraviolet radiation to liberate the porogen. The silicon nitride film may be densified such that a pore resulting from liberation of the porogen is reduced in size, and Si—N bonds in the silicon nitride film are strained to impart a tensile stress in the silicon nitride film. In another embodiment, tensile stress in a silicon nitride film may be enhanced by depositing a silicon nitride film in the presence of a nitrogen-containing plasma at a temperature of less than about 400° C., and exposing the deposited silicon nitride film to ultraviolet radiation.
摘要:
Methods are provided for depositing amorphous carbon materials. In one aspect, the invention provides a method for processing a substrate including forming a dielectric material layer on a surface of the substrate, depositing an amorphous carbon layer on the dielectric material layer by introducing a processing gas comprises one or more hydrocarbon compounds and an argon carrier gas, and generating a plasma of the processing gas by applying power from a dual-frequency RF source, etching the amorphous carbon layer to form a patterned amorphous carbon layer, and etching feature definitions in the dielectric material layer corresponding to the patterned amorphous carbon layer. The amorphous carbon layer may act as an etch stop, an anti-reflective coating, or both.
摘要:
A method of forming a layer on a substrate in a chamber, wherein the substrate has at least one formed feature across its surface, is provided. The method includes exposing the substrate to a silicon-containing precursor in the presence of a plasma to deposit a layer, treating the deposited layer with a plasma, and repeating the exposing and treating until a desired thickness of the layer is obtained. The plasma may be generated from an oxygen-containing gas.
摘要:
A process flow integration scheme employs one or more techniques to control stress in a semiconductor device formed thereby. In accordance with one embodiment, cumulative stress contributed by RTP of a nitride spacer and polysilicon gate, and subsequent deposition of a high stress etch stop layer, enhance strain and improve device performance. Germanium may be deposited or implanted into the gate structure in order to facilitate stress control.
摘要:
Methods for forming silicon nitride hard masks are provided. The silicon nitride hard masks include carbon-doped silicon nitride layers and undoped silicon nitride layers. Carbon-doped silicon nitride layers that are deposited from a mixture comprising a carbon source compound, a silicon source compound, and a nitrogen source in the presence of RF power are provided. Also provided are methods of UV post-treating silicon nitride layers to provide silicon nitride hard masks. The carbon-doped silicon nitride layers and UV post-treated silicon nitride layers have desirable wet etch rates and dry etch rates for hard mask layers.
摘要:
Stress of a silicon nitride layer may be enhanced by deposition at higher temperatures. Employing an apparatus that allows heating of a substrate to substantially greater than 400° C. (for example a heater made from ceramic rather than aluminum), the silicon nitride film as-deposited may exhibit enhanced stress allowing for improved performance of the underlying MOS transistor device. In accordance with alternative embodiments, a deposited silicon nitride film is exposed to curing with ultraviolet (UV) radiation at an elevated temperature, thereby helping remove hydrogen from the film and increasing film stress. In accordance with still other embodiments, a silicon nitride film is formed utilizing an integrated process employing a number of deposition/curing cycles to preserve integrity of the film at the sharp corner of the underlying raised feature. Adhesion between successive layers may be promoted by inclusion of a post-UV cure plasma treatment in each cycle.
摘要:
Methods and apparatus for electron beam treatment of a substrate are provided. An electron beam apparatus that includes a vacuum chamber, at least one thermocouple assembly in communication with the vacuum chamber; and a heating device in communication with the vacuum chamber and combinations thereof are provided. In one embodiment, the vacuum chamber comprises a cathode, an anode, and a substrate support. In another embodiment, the vacuum chamber comprises a grid located between the anode and the substrate support. In one embodiment the heating device comprises a first parallel light array and a second light array positioned such that the first parallel light array and the second light array intersect. In one embodiment the thermocouple assembly comprises a temperature sensor made of aluminum nitride.