Abstract:
A chemical-mechanical polishing composition includes colloidal silica abrasive particles dispersed in a liquid carrier having a pH in a range from about 1.5 to about 7. The colloidal silica abrasive particles include an aminosilane compound or a phosphonium silane compound incorporated therein. The composition may be used to polish a substrate including a silicon oxygen material such as TEOS.
Abstract:
A chemical mechanical polishing composition for polishing a substrate having a tungsten layer includes a water based liquid carrier, a colloidal silica abrasive dispersed in the liquid carrier and having a permanent positive charge of at least 6 mV, an amine compound in solution in the liquid carrier, and an iron containing accelerator. A method for chemical mechanical polishing a substrate including a tungsten layer includes contacting the substrate with the above described polishing composition, moving the polishing composition relative to the substrate, and abrading the substrate to remove a portion of the tungsten from the substrate and thereby polish the substrate.
Abstract:
The present invention provides compositions and methods for polishing a molybdenum metal-containing surface. A polishing composition (slurry) described herein comprises an abrasive concentration of an inorganic particulate abrasive material (e.g., alumina or silica) suspended in an acidic aqueous medium containing a water soluble surface active material and an oxidizing agent. The surface active material is selected based on the zeta potential of the particulate abrasive, such that when the abrasive has a positive zeta potential, the surface active material comprises a cationic material, and when the particulate abrasive has a negative zeta potential, the surface active material comprises an anionic material, a non-ionic material, or a combination thereof.
Abstract:
The inventive method comprises chemically-mechanically polishing a substrate with an inventive polishing composition comprising a liquid carrier and abrasive particles that have been treated with a compound.
Abstract:
The present invention provides chemical mechanical polishing compositions and methods for polishing a substrate comprising silicon dioxide and silicon nitride, which provide selective removal of SiN relative to silicon oxide (e.g., PETEOS) on patterned wafers. In one embodiment, a CMP method comprises abrading a surface of a substrate comprising SiN and silicon oxide with a CMP composition to remove at least some SiN therefrom. The CMP composition comprises, consists essentially of, or consists of a particulate abrasive (e.g., ceria) suspended in an aqueous carrier and containing a cationic polymer bearing pendant quaternized nitrogen-heteroaromatic moieties, wherein the composition has a pH of greater than about 3.
Abstract:
Disclosed are a chemical-mechanical polishing composition and a method of polishing a substrate. The polishing composition comprises wet-process ceria abrasive particles, (e.g., about 120 nm or less), at least one alcohol amine, at least one surfactant having at least one hydrophilic moiety and at least one hydrophobic moiety, the surfactant having a molecular weight of about 1000, and water, wherein the polishing composition has a pH of about 6. The polishing composition can be used, e.g., to polish any suitable substrate, such as a polysilicon wafer used in the semiconductor industry.
Abstract:
The invention provides a polishing pad for chemical-mechanical polishing comprising a porous polymeric material, wherein the polishing pad comprises closed pores and wherein the polishing pad has a void volume fraction of 70% or more. Also disclosed is a method for preparing the aforesaid polishing pad and a method of polishing a substrate by use of theaforesaid polishing pad.
Abstract:
Disclosed is a polishing pad for chemical-mechanical polishing. The polishing pad has a porous interface and a substantially non-porous bulk core. Also disclosed are related apparatus and methods for using and preparing the polishing pad.
Abstract:
The invention provides a polishing pad for chemical-mechanical polishing comprising a body, a polishing surface, and a plurality of elongated pores, wherein about 10% or more of the elongated pores have an aspect ratio of about 2:1 or greater and are substantially oriented in a direction that is coplanar with the polishing surface. The invention further provides a method of polishing a substrate.
Abstract:
This invention relates to an apparatus for processing particles. The apparatus comprises a particle source having an exist aperture; an extraction electrode located at the exist aperture; an acceleration electrode adjacent to the extraction electrode; a processing compartment adjacent to the acceleration electrode; and a deceleration electrode located adjacent to the processing compartment. The invention also relates to methods of processing particles and to particles processed by the apparatus and methods of the invention.