摘要:
A method of etching a semiconductor structure, comprises contacting an under bump metallization (UBM) with an etching composition. The UBM includes an underlying layer comprising titanium and an overlying layer comprising a second metal. The etching composition is a liquid comprising at least 0.1 wt % hydrofluoric acid and at least 0.1 wt % phosphoric acid.
摘要:
A chemical mechanical polishing (CMP) method for removal of a metal layer deposited over a titanium nitride (TiN) or titanium/titanium nitride (Ti/TiN) barrier layer is described herein. The method comprises abrading the metal layer with an acidic CMP composition to expose the underlying TiN or Ti/TiN layer, wherein the TiN or Ti/N layer is polished at a low rate due to the presence of a surfactant inhibitor. The acidic CMP composition comprises a particulate abrasive (e.g., silica, alumina) suspended in a liquid carrier containing a surfactant selected from the group consisting of an anionic surfactant, a nonionic surfactant, cation surfactants, and a combination thereof.
摘要:
A polishing slurry for tungsten and a substrate polishing method are disclosed. The polishing slurry includes an abrasive for performing polishing and having positive zeta potential, and a potential modulator for promoting the oxidation of the tungsten and for controlling the zeta potential of the abrasive.
摘要:
The present invention relates to a metal polishing slurry containing abrasive grains, a metal-oxide-dissolving agent, and water, wherein the abrasive grains contain two or more abrasive grain species different from each other in average secondary particle diameter. Using the metal polishing slurry of the present invention, a metal polishing slurry can be obtained which gives a large polishing rate of an interlayer dielectric layer, and is high in the flatness of the polished surface. This metal polishing slurry can provide suitable method for a semiconductor device which is excellent in being made finer and thinner and in dimension precision and in electric characteristics, is high in reliability, and can attain a decrease in costs.
摘要:
Methods for manufacturing cast titanium helmets include casting a helmet in an oversized mold. The resulting oversized cast helmet is then exposed to a hot isostatic press (HIP) process that applies heat and pressure for a predetermined period of time. The resulting oversized cast helmet is then exposed to an acid bath that chemically mills the helmet to a desired thickness and removes contaminants formed during casting of titanium.
摘要:
A chemical mechanical polishing slurry containing multiple oxidizers and nano abrasive particles (including engineered nano diamond particles) suitable for polishing multilayer substrate with tungsten and Ti/TiN barrier layers. The slurry contains no metallic catalyst and has low total abrasive particle content. The absence of metal ions can be advantageous for certain applications as certain metal ions may present contamination issues. A low total abrasive content may also lower the total defect counts, reduce the slurry waste treatment burden, and simplify the post CMP clean process.
摘要:
A method of processing a metallic material includes immersing ferritic stainless steel or austenitic stainless steel in an acid solution containing hydrochloric acid in an amount of two times or more relative to the concentration of nitric acid or an acid solution containing hydrofluoric acid in an amount of one and a half times or more relative to the concentration of nitric acid to adjust surface roughness of the metallic material.
摘要:
A golf club head having a striking plate with regions of varying thickness is disclosed herein. A central region has a first thickness range that is thicker than the thickness range of any of the other regions. The thickness of the regions decreases outward from the center. The striking plate may be used on a fairway wood-type golf club head or a driver-type golf club head. The striking plate is preferably composed of steel or titanium.
摘要:
An etching solution for etching one of a copper single metal layer and a copper (Cu)/titanium (Ti) double metal layer that serves as one of a gate electrode, a source electrode, and a drain electrode of a thin film transistor for a liquid crystal display (LCD) device includes oxone, fluoric compounds, one of a reducing agent and a weak oxidizing agent, an etching rate restrainer, KHF2, and water.
摘要:
A process for detecting an aluminum-based material deposited onto a titanium-based gas turbine engine component during engine operation is disclosed. The process comprises immersing at least a portion of the titanium-based component, which has been subjected to engine operation, into an acid solution to form an etched component. The acid solution comprises sodium fluoride, sulphuric acid and water. The etched component may then be removed from the solution and visually inspected for dark areas in contrast to light areas, the dark areas indicating deposited aluminum-based material.