35results about How to "Control etch rate" patented technology

The invention discloses a cleaning agent which has simple preparation method, low cost and low corrosion rate on substrate material and metallic wiring, and no pollution on environment and is used for removing the residues of photoresist. According to the weight percentage, the cleaning agent comprises the following raw materials: 1%-15% of surfactant, 5%-40% of organic amine, 5%-30% of organic solvent, 0.1%-5% of chelating agent, 0.01%-5% of corrosion inhibitor and residual quantity of pure water.

The invention discloses a method for preparing a KTP rib optical waveguide by combining ion implantation with ion beam etching, and belongs to the technical field of preparation of photoelectronic devices. The preparation method comprises the following steps of: optically polishing the surface and two opposite end faces of a z-cut KTP crystal with the dimension of 10mm*10mm*1mm; cleaning samples by using acetone, deionized water and alcohol, and performing ion implantation to obtain a planar optical waveguide; coating a BP218 photoresist on the samples in a spinning mode, exposing a mask plate, and developing and hardening to form a bar-shaped mask of the photoresist; putting the samples into a target chamber of an ion beam etcher, vacuumizing to reach the pressure of 10<-4>Pa and performing ion beam etching; and cleaning the photoresist mask to prepare the rib optical waveguide. The prepared rib optical waveguide has the advantages of capacity of well keeping the nonlinear optical property of the KTP crystal, and potential application value in the preparation of optical switches and optical modulators and in other aspects.

The invention is an inductance coupling coil, nested of two groups of involute coils, where the involute coil can be a segment of involute, or composed of inner and outer coils of an involute shape, and the two groups of involute coils are the same in shape and centro-symmetrically distributed. And the design of a completely symmetrical plane coil structure makes electromagnetic field distribution in a reaction chamber quite symmetrical, thus improving distribution uniformity of plasma in the reaction chamber so as to make etching rates of all points on the surface of a wafer closer. And an inductance coupled plasma device of this structure reduces the inductance of the inductance coupling coil, thus able to be very easy to obtain a large-area plasma and improve plasma uniformity in the large-area process. And it can improve the quality of etching wafer.

The invention provides a cleaning agent for wafer polishing, which is simple in preparation method and low in cost, doest not pollute the environment and can meet the polishing and cleaning requirements of a wafer with a line width dimension of 90 nanometers or less than 90 nanometers. The compositions by weight percentage of raw materials are: 5 to 15 percent of surface active agent, 0.01 to 10 percent of organic alkali, 5 to 20 percent of pH regulator, 2 to 5 percent of osmotic agent, 0.1 to 2 percent of chelon, the balance being pure water.

The invention aims to provide an etching solution composition and an etching method for copper and copper alloy. A metal laminated film containing a copper layer and a copper oxide layer and/or a copper alloy layer is etched by the etching solution composition with good precision, thereby forming an excellent sectional shape, realizing excellent practicability and stability and achieving long service lifetime. The etching solution composition is used to etch the metal laminated film containing the copper layer and the copper oxide layer and/or the copper alloy layer. In addition, the etching solution composition contains 0.1-80 wt% of persulfate solution and/or persulfuric acid solution, 0.1-80 wt% of phosphoric acid and 0.1-50 wt% of nitric acid and/or sulfuric acid and is further added with chloride ions and ammonium ions, thereby making it easy to control the etching rate and the sectional shape.

The invention discloses an additive for preparing a porous pyramid structure by secondary texturing of a monocrystalline silicon wafer. The additive comprises the following components in percentage bymass: 0.1-10% of sodium polystyrenesulfonate, 2-20% of polyethylene glycol, 1-5% of a fluorocarbon surfactant and 20-30% of inorganic salt, with the balance being water. The additive disclosed by theinvention is added into texturing liquid for secondary texturing of the monocrystalline silicon wafer, so the porous pyramid structure can be formed on the surface of the monocrystalline silicon wafer. The method for preparing the porous pyramid structure of the monocrystalline silicon wafer is lower in cost and simpler in process.

The invention relates to the technical field of a semiconductor, and discloses a multilayered medium etching method. The method comprises the following steps of: providing a semiconductor substrate, wherein the surface of the semiconductor substrate is sequentially coated with the multilayered medium and a graphic photoresist layer; and ionizing the etching gas which is the mixed gas such as fluorocarbon gas, fluorinated carbureted hydrogen gas and nitrogen oxide gas by taking the graphic photoresist layer as a mask, and etching the multilayered medium by the etching gas until the multilayered medium is exposed to the surface of the semiconductor substrate. The method takes the fluorocarbon gas and the fluorinated carbureted hydrogen gas with high C/F ratio as the main etching gas; and the nitrogen oxide gas in a certain flow is added, so that a purpose of etching the multilayered medium formed by different materials through one-step plasma etching primary is achieved, and the etching is not performed by many steps of layering the materials. The photoresist layer as the mask has a low etching rate.

The invention discloses a substrate wet process technological method, and aims to solve the technical problem of potential damage in the substrate processing process in the existing wet etching process. The technological method comprises the steps of setting a bearing platform and fixing a substrate through the bearing platform; moving the bearing platform along a circumferential track to convey the substrate; setting processing equipment along the outer side of the circumferential track; and in the substrate conveying process, adjusting the orientation and/or height of the substrate by the bearing platform to be matched with the processing equipment. The moving technological beat of the bearing platform along the circumferential track is controlled by an annular conveyor belt, so that consumed resource, manpower, time and other maintenance cost in replacing a huge number of rolling wheels periodically can be saved; the etching process and cleaning technological method are further improved; the jetting direction of the medicinal liquid and net water flow is changed; etching rate and medicinal liquid take-out amount are controlled effectively; and the cost is lowered while the etching quality can be effectively ensured. The invention also provides a substrate wet process technological apparatus.

The invention discloses a method for manufacturing an MOS transistor with a germanium silicon source and drain. The method comprises steps that S1, a silicon substrate is provided, a gate structure isformed on a surface of the silicon substrate, and a side wall is formed on a side surface of the gate structure; and S2, a groove having the meandering shape is formed on two sides of the gate structure, including sub steps of S21, a hard mask layer is formed; S22, a formation region of the groove of the photolithography process is employed; S23, first dry etching is performed to form a first portion of the groove; S24, second cleaning process is performed, the cleaning solution adopts the combination of DHF and DIO3, the DHF is employed to remove contamination on the surface of the silicon substrate, the DIO3 is employed to control the etching rate of the oxide layer brought by the DHF, and S25, third wet etching is performed to form a final groove. The method is advantaged in that control of the cleaning process after the groove is dry can be realized, and loss of an oxide layer can be reduced or avoided while the contamination on the surface of the silicon substrate can be sufficiently removed.

The invention provides a deep silicon hole etching method, comprising a first etching step of inletting a first etching gas into a reaction chamber, and meanwhile switching on an excitation power supply and a bias power supply so as to etch a silicon hole in a silicon substrate, the first etching gas including a mixed gas of SF6 and O2, the gas flows of which are set to enable a vertical upper portion for the side wall of the silicon wall; and a second etching step of inletting a second etching gas into the reaction chamber, and meanwhile switching on the excitation power supply and the bias power supply so as to modify the morphology of the bottom of the silicon hole while continuing the etching of the silicon hole, the second etching gas including a mixed gas of SF6, C4F8, He and O2, the gas flows of which are set to enable the bottom width of the side wall of the silicon wall to shrink and the bottom of the silicon hole to be smooth. The invention can be used for obtaining a deep silicon hole of which the upper portion of the side wall is vertical, the bottom width of the side wall shrinks and the bottom is flat and smooth.

The invention relates to the technical field of etching, and provides an etching liquid composition. The cleaning agent comprises the following components in percentage by weight: 10-20% of hydrogen peroxide, 0.5-4% of inorganic acid, 1-4% of a compound with both amino and alcohol groups, 1-5% of a pH regulator, 1-5% of organic acid or amino acid, 1-5% of a metal ion chelating agent, 0.1-2% of a hydrogen peroxide stabilizer and the balance of water. And has a first acidity and a second acidity. The quality guarantee period of the etching liquid composition can reach one month, etching residues are avoided, etching broken lines are not prone to being generated, copper and copper alloy films of advanced-generation panels can be effectively etched, and the etching liquid composition can be used for etching transparent conductive films in panel display devices. The etching liquid composition can be prepared by two different preparation schemes, the shelf life of the obtained etching liquid composition can reach one month, but the line width loss difference of the etching liquid composition prepared by the first preparation scheme is obviously superior to that of the etching liquid composition prepared by the second preparation scheme.

The invention relates to a method for forming a metal wiring groove, which comprises the following steps: providing a semiconductor substrate; sequentially forming an interlayer medium layer, a dielectric layer, a bottom antireflection layer, a low-temperature silicon oxide layer and a patterning photoresist layer on the semiconductor substrate; taking the patterning photoresist layer as a mask, and etching the low-temperature silicon oxide layer to expose the bottom antireflection layer to form a first groove pattern; taking the patterning photoresist layer and the low-temperature silicon oxide layer as masks, and etching the bottom antireflection layer along the first groove pattern to expose the dielectric layer to form a second groove pattern, wherein the etching gas is mixed gas of carbon dioxide and carbon monoxide; and taking the low-temperature silicon oxide layer and the antireflection layer as masks, and etching the dielectric layer along the second groove pattern to form the metal wiring groove. The invention can effectively control the critical dimension of the second groove pattern formed on the bottom antireflection layer to achieve a predetermined value, so that thecritical dimension of the sequentially formed metal wiring groove is the same as a predetermined value, and the performance of a semiconductor device is improved.

The object of the present invention is to provide an etching solution that can perform etching simply and economically while reducing the side etching difference of a laminated film adjacent to a zincoxide or a transparent metal oxide film containing zinc oxide and a silver or silver alloy film. combination. The present invention relates to an etching solution composition for simultaneously etching the above two films of a laminated film substrate where a zinc oxide or a transparent metal oxide film containing zinc oxide and a silver or silver alloy film are adjacent to each other, which includes (A) peroxide Hydrogen, (B) silver complexing agent, and (C) water.

The invention discloses a dry etching reaction device and a gas nozzle for dry etching reaction. The dry etching reaction device comprises a reaction cavity; a gas pipeline arranged in the reaction cavity; and the gas nozzle, which comprises a gas inlet, a gas channel and at least two gas outlets, which are communicated in sequence. The gas inlet is communicated with the gas channel; and the gas output directions of the at least two gas outlets are not vertical with each other. Through the mode above, the dry etching reaction device and the gas nozzle for dry etching reaction can control uniformity of reaction gas in the reaction cavity, and improve uniformity of gas ions in the etching process to enable dry etching to be more uniform and to achieve an etching rate control purpose.

The invention discloses an etching device and an etching method. The etching device comprises a chamber with a plurality of gas inlets, wherein a wafer tray is arranged in the chamber for carrying a wafer; the chamber also comprises a plurality of etching control units which are positioned below the wafer tray; the etching control units are used for controlling voltage of corresponding to-be-etched positions of the wafer; and the polarity of the voltage is reverse to that of a charged etching gas introduced into the chamber through the gas inlets. The etching device is also provided with a plurality of gas outlets which are connected with a vacuum-pumping system through valves for controlling pressure during etching. The gas inlets are also connected with an inert gas source for providing an inert gas through conduction valves. Through the etching device and the etching method, the etching rate can be controlled well and the etching uniformity is high.

The invention discloses a gallium arsenide etching method which comprises the steps: placing gallium arsenide in electrolyte of an electrochemical reaction tank, wherein the electrolyte comprises non-oxidizing acid, metal bromide and water; and inputting a predetermined voltage into an electrode in the electrochemical reaction tank, wherein the predetermined voltage is a voltage for keeping a predetermined etching rate when the pH value of the electrolyte and the concentration of the metal bromide are in a predetermined range. Bromide ions from the metal bromide can generate bromine gas through electrochemical reaction, and the bromine gas reacts with water to generate hypobromic acid; and gallium arsenide can react with hydrogen ions in the electrolyte after being oxidized by the hypobromic acid, and the purpose of etching the gallium arsenide in an electrochemical reaction mode is achieved. According to the gallium arsenide etching method, the etching rate of gallium arsenide can becontrolled by controlling the voltage, the etching rate is easy to control, and the control precision is high.

The invention relates to a wafer processing device and a wafer processing method. The device comprises a wafer carrier which is used for bearing a wafer; a revolution driving device which can drive the wafer carrier to rotate along a revolution shaft, wherein the revolution shaft is located outside the wafer carrier; and an autorotation driving device which can drive the wafer carrier to rotate along an autorotation shaft, wherein the autorotation shaft is located at the circle center of the wafer carrier and is perpendicular to the surface of the wafer. The wafer processing method comprises acleaning step and a liquid medicine throwing step, wherein in the cleaning step, a wafer is driven to rotate along a revolution shaft by adopting a revolution driving device; in the liquid medicine throwing step, an autorotation driving device is adopted to drive the wafer to rotate along an autorotation shaft. The invention aims to etch the wafer by designing the wafer processing device into a mode of combining revolution and rotation, optimize the total thickness deviation and consistency of the wafer, control the etching rate of the wafer, improve the utilization rate of liquid medicine tothe maximum extent and reduce the manufacturing cost.

The invention discloses a semiconductor structure and a forming method thereof. The method comprises the steps that a substrate which is provided with a fin structure is provided; a dummy gate layer crossing the fin structure is formed on the substrate, the dummy gate layer comprises a main body part and an extension part, the main body part crosses part of the side wall surface and part of the top surface of the fin structure, the top of the extension part is lower than the top surface of the fin structure, and the extension part is located at a corner formed by part of the side wall of the fin structure and the side wall of the main body part; and the extension part is removed by adopting a first cleaning process. The performance of the semiconductor structure formed by the method is improved.