摘要:
A polishing composition includes an abrasive, phosphoric acid, and an oxidizing agent and has a pH of 6 or less. The polishing composition has the capability for polishing an alloy containing nickel and iron with a high stock removal rate. Accordingly, the polishing composition is preferably used in an application for polishing an object including the alloy containing nickel and iron.
摘要:
A filtration method, that includes: (A) filtering a liquid having particles with a resin media filter; and (B) applying ultrasonic waves at a frequency of at least 30 kHz to the resin media filter during the filtering (A) or after completion of the filtering (A) to regenerate the resin media filter, where: i) a material of the resin media filter is nylon, polycarbonate, polytetrafluoroethylene (PTFE), polysulfone, polyether sulfone, and/or cellulose, ii) for the regeneration of the resin media filter, the applying results in a filter regeneration ratio of at least 0.40; iii) on a surface of the resin media filter, a support material comprising a mesh resin layer is disposed; and iv) the resin media filter is present in a filter housing having a three-dimensional shape and an ultrasonic vibrator, which generates the ultrasonic waves, is present on a lateral side of said filter housing.
摘要:
Provided is a polishing composition containing an abrasive and water. The abrasive content in the polishing composition is no less than 0.1% by mass. The abrasive contains zirconium oxide particles. The zirconium oxide particles have a specific surface area of from 1 to 15 m2/g. The zirconium oxide particles preferably have a purity of no less than 99% by mass. The polishing composition is used in, for example, polishing a hard and brittle material, such as sapphire, silicon nitride, silicon carbide, silicon oxide, glass, gallium nitride, gallium arsenide, indium arsenide, and indium phosphide.
摘要:
A polishing composition includes more than 0.1% by mass of colloidal silica, and water, and has a pH of 6 or less. The polishing composition has the ability to polish a titanium material at a high stock removal rate. Thus, the polishing composition is suitable for use in applications for polishing a titanium-containing object.
摘要:
According to the present invention, a filtration method capable of prolonging the life of a filter and regenerating it without impairing the efficiency can be provided. Further, a filter regenerating method and a regenerating apparatus, for efficiently regenerating a filter, are provided. The filtration method of the present invention is a method of subjecting a liquid to filtration by using a resin media filter, wherein ultrasonic waves at a frequency of at least 30 kHz are applied to the filter while the filtration is carried out, during the temporary stop of the filtration or after completion of the filtration. Efficient purification is possible by subjecting a polishing composition to filtration by such a filtration method. Further, the filter regenerating method of the present invention comprises applying ultrasonic waves at a frequency of at least 30 kHz to a used resin filter.
摘要:
A polishing composition contains alumina, a complexing agent, and an oxidizing agent. It is preferable that the complexing agent is at least one compound selected from an α-amino acid, ammonia, and an ammonium salt. The polishing composition is preferably used in applications for polishing an object having a resin section with a trench, and a conductor layer provided on the resin section so that at least the trench is filled with the conductor layer.
摘要:
A polishing composition capable of satisfactorily polishing a semiconductor. The first polishing composition of the present invention includes silicon dioxide, at least one component selected from periodic acids and salts thereof, at least one component selected from tetraalkyl ammonium hydroxides and tetraalkyl ammonium chlorides, hydrochloric acid, and water, and contains substantially no iron. The second polishing composition of the present invention includes a predetermined amount of fumed silica, a predetermined amount of at least one component selected from periodic acids and salts thereof, a tetraalkyl ammonium salt represented by the following general formula (1), at least one component selected from ethylene glycol and propylene glycol, and water. The pH of the second polishing composition is greater than or equal to 1.8 and is less than 4.0.
摘要:
A polishing composition includes more than 0.1% by mass of colloidal silica, and water, and has a pH of 6 or less. The polishing composition has the ability to polish a titanium material at a high stock removal rate. Thus, the polishing composition is suitable for use in applications for polishing a titanium-containing object.