87results about How to "Uniform etch rate" patented technology

A plasma reactor for processing a workpiece includes a reactor chamber, an electrostatic chuck within the chamber for supporting a workpiece, an RF plasma bias power generator coupled to apply RF power to the electrostatic chuck and a refrigeration loop having an evaporator inside the electrostatic chuck with a refrigerant inlet and a refrigerant outlet. Preferably, the evaporator includes a meandering passageway distributed in a plane beneath a top surface of the electrostatic chuck. Preferably, refrigerant within the evaporator is apportioned between a vapor phase and a liquid phase. As a result, heat transfer between the electrostatic chuck and the refrigerant within the evaporator is a constant-temperature process. This feature improves uniformity of temperature distribution across a diameter of the electrostatic chuck.

Mixing ratio and flow rate of a first gaseous mixture supplied to a central portion of the substrate are set. Subsequently, etching is performed by changing a mixing ratio of a second gaseous mixture supplied to an outer peripheral portion of the substrate while a setting of the first gaseous mixture is fixed, thereby, setting the mixing ratio of the second gaseous mixture based on an etching result to make etching selectivities and shapes at the central portion and the outer peripheral portion of the substrate uniform. Then, etching is performed by changing a flow rate of the second gaseous mixture while settings of the first gaseous mixture and the mixing ratio of the second gaseous mixture are fixed, thereby, setting the flow rate of the second gaseous mixture based on etching results to make etching rates at the central portion and the outer peripheral portion of the substrate uniform.

An ion beam extractor controls a direction and an intensity of ion beams by adjusting a voltage applied to a grid having slits formed therein, thereby enhancing uniformity of an etching rate of a wafer, leading to an increase of productivity of semiconductor diodes. The ion beam extractor comprises an ion source to produce an ion beam and at least one grid located at a rear end of the ion source in a progressing path of the ion beam produced by the ion source to adjust a direction of the ion beam by controlling a voltage applied to the at least one grid.

A processing method of barium-strontium titanate and bismuth zinc niotate composite films is characterized by 1, preparing a photoresist mask graphic on the surface of a BST+BZN composite film sample, 2, preparing etching: A is water solution prepared by nitricacid (HNO3), hydrofluoric acid (HF) and citrate (CA), and B is water prepared by hydrochloric acid (HC1) and hydrofluoric acid (HF), 3, sequentially etching the BST+BZN composite film sample in etching solutions A,B, and determining etching time according to respective thicknesses of BST and BZN, 4, removing a photoresist mask by aid of acetone/alcohol, and preparing the photoresist mask again, 5, performing low-power ultrasonic processing on the BST+BZN composite film sample in the etching A, and 6, utilizing the acetone/alcohol to remove the photoresist mask, cleaning the sample, and drying the sample by nitrogen (N2). Surfaces of positions etched by the processing method do not have residue, and then the processing method is complete in etching and high in graphic transforming precision.

The invention discloses an amorphous carbon film processing method and an opening forming method. The amorphous carbon film processing method comprises the following steps: a substrate is provided; an amorphous carbon film is formed on the surface of the substrate; the amorphous carbon film is subjected to annealing treatment; and the amorphous carbon film after the annealing treatment is subjected to ultraviolet light treatment. Through the treatment method of amorphous carbon film, provided by the invention, the distribution of hydrogen atoms in the amorphous carbon film is uniform, so that the etching speed of the amorphous carbon film is uniform, a flat and uniform etched surface in the etching process of different regions is favorably formed, and the performance of the semiconductor device is accordingly improved. Correspondingly, the invention also provides a method for forming an opening by etching the treated amorphous carbon film.

Methods for etching a metal layer and a metallization method of a semiconductor device using an etching gas that includes Cl2 and N2 are provided. A mask layer is formed on the metal layer, the etching gas is supplied to the metal layer, and the metal layer is etched by the etching gas using the mask layer as an etch mask. The metal layer may be formed of aluminum or an aluminum alloy. Cl2 and N2 may be mixed at a ratio of 1:1 to 1:10. The etching gas may also include additional gases such as inactive gases or gases that include the elements H, O, F, He, or C. In addition, N2 may be supplied at a flow rate of from 45-65% of the total flow rate of the etching gas, which results in a reduction in the occurrence of micro-loading and cone-shaped defects in semiconductor devices.

A plasma chemical reactor is provided. The reactor includes a chamber, a cathode assembly, and a baffle plate. The chamber forms a plasma reaction space. The cathode assembly includes a cathode support shaft and a substrate support. The cathode support shaft is coupled at one side to a wall surface of the chamber. The substrate support is coupled to the other side of the cathode support shaft and supports the substrate. The baffle plate is out inserted and coupled to the substrate support, and has a plurality of vents arranged to be spaced apart and through formed such that reaction gas can pass through, and the vents asymmetrically arranged and formed to get a vent area smaller at an opposite side than a top side of the cathode support shaft.

A dry etching apparatus includes a gas supply portion located in an upper electrode of the dry etching apparatus and disposed parallel to a wafer, a lower surface area of the gas supply portion beingnot smaller than an upper surface area of the wafer,. The gas supply portion sequentially comprises a central region, an intermediate region surrounding the central region and an edge region surrounding the intermediate region from inside to outside, wherein the edge region is divided into at least two edge region gas chambers, and the edge region gas chambers penetrate the edge region; The waferhas a uniform etching rate by adjusting the reaction gas in each region of the gas supply portion.

A plasma processing apparatus includes: a decompression chamber of which the inside is depressed; a gas supply unit that supplies process gas into said chamber; a microwave supply unit that supplies a microwave into the chamber to generate plasma; an object-placing electrode where a processing material, is placed and which holds the processing material in the chamber; and a vacuuming unit that is connected to the chamber to discharge the gas in the chamber, in which the chamber, a part for providing gas into the chamber of the gas supply unit, a part for introducing a microwave into the chamber of the microwave supply unit, the object-placing electrode, and the vacuuming unit are disposed coaxially with the center axis of the chamber, and the part for introducing a microwave includes a microwave rotation generator that rotates a polarization plane of the input microwave and supplies the microwave to the chamber.

The embodiment of the invention provides a plasma treatment device. The plasma treatment device comprises a vacuum treatment cavity, a first electrode, and a non-dielectric material layer, wherein the first electrode is positioned in the vacuum treatment cavity; a platform for placing wafers to be treated is arranged above the first electrode; the first electrode is electrically connected with two radio frequency power supplies, and the frequency of a first radio frequency source is 1.5 times higher than that of a second radio frequency source; the non-dielectric material layer is positioned between the first electrode and the platform for placing the wafers to be treated; and the resistivity of the non-dielectric material layer is higher than that of the first electrode. The plasma treatment device provided by the embodiment of the invention improves the distribution uniformity of plasmas in the vacuum treatment cavity and improves the uniformity of the wafers which are treated by the plasma treatment device.

A formation method of a semiconductor structure comprises the following steps of providing a semiconductor substrate; forming a fin portion on the semiconductor substrate; forming an isolation layer on the semiconductor substrate, wherein a surface of the isolation layer is lower than a top surface of the fin portion and covers a side wall of parts of the fin portion; forming a dielectric layer on a fin portion surface; forming a sidewall of the dielectric layer covering a fin portion sidewall surface; taking the side wall as a mask layer, using a wet etching process to etch the dielectric layer so that the top surface of the fin portion is exposed. By using the method, damages to the fin portion, which is generated through using dry etching, can be reduced, which is good for subsequent epitaxial growth; and performance of the formed semiconductor structure is increased.

In the plasma processing by an electrically negative gas, the in-plane uniformity of plasma processing is enhanced compared to the conventional case by controlling the ion density in the plasma. Not only is a processing gas being an electrically negative gas introduced from a processing gas source 170 into a processing chamber 102 but also an electrically negative gas having electron attachment coefficient greater than that of the processing gas is introduced as an additional gas from an additional gas source 180 to thereby form a plasma. In the plasma formation, the ion density in the plasma is controlled by regulating the flow rate of the additional gas relative to that of the processing gas.

A method MT includes etching a wafer W using plasma generated in a processing container. The etching includes a process of inclining and rotating a holding structure holding the wafer W during execution of the etching and the process successively creating a plurality of inclined rotation states RT(φ, t) with respect to the holding structure. In the inclined rotation states, the wafer W is rotated about a central axis of the wafer W over a predetermined process time while maintaining a state where the central axis is inclined with respect to a reference axis of the processing container which is in the same plane as the central axis. A combination of a value φ of an inclination angle AN of the central axis with respect to the reference axis and the process time t differs for each of the plurality of inclined rotation states.

Methods of fabricating comb drive devices utilizing one or more sacrificial etch-buffers are disclosed. An illustrative fabrication method may include the steps of etching a pattern onto a wafer substrate defining one or more comb drive elements and sacrificial etch-buffers, liberating and removing one or more sacrificial etch-buffers prior to wafer bonding, bonding the etched wafer substrate to an underlying support substrate, and etching away the wafer substrate. In some embodiments, the sacrificial etch-buffers are removed after bonding the wafer to the support substrate. The sacrificial etch-buffers can be provided at one or more selective regions to provide greater uniformity in etch rate during etching. A comb drive device in accordance with an illustrative embodiment can include a number of interdigitated comb fingers each having a more uniform profile along their length and/or at their ends, producing less harmonic distortion during operation.