Description

Silicon Monoxide (SiO) is a high-purity inorganic compound of significant industrial importance, primarily valued for its role as a precursor in the deposition of silicon dioxide (SiO₂) films. Its controlled vapor-phase deposition is critical for creating high-quality, uniform dielectric and protective coatings in advanced manufacturing. This material is essential for suppliers and manufacturers in the semiconductor, optics, and thin-film coating industries, where precise material properties directly impact product performance and yield.

Application

• Semiconductor Manufacturing: Key precursor for the vapor deposition of silicon dioxide (SiO₂) insulating and passivation layers on silicon wafers.
• Optical Coatings: Used to deposit thin, durable, and transparent SiOx films on lenses, mirrors, and other optical components to control reflectivity and transmission.
• Barrier and Protective Layers: Applied as a thin film to protect sensitive metallic surfaces, such as aluminum mirrors or semiconductor metallization, from oxidation and corrosion.
• Glass and Ceramic Production: Serves as a starting material or additive in the synthesis of specialty glasses and silicon-based ceramics.
• Research & Development: Utilized in materials science research for studying the properties of sub-stoichiometric silicon oxides and intermediate phases in silicon oxidation processes.
• Evaporation Source Material: Employed in physical vapor deposition (PVD) processes, such as thermal evaporation or e-beam evaporation, to create thin films.

Basic Information

Product Name	Silicon Monoxide
CAS No.	10097-28-6
Molecular Formula	SiO
Molecular Weight	44.08 g/mol
Synonyms	Silicon(II) Oxide; Silicon Oxide (SiO); Oxosilylene; Monoxosilane; Silicon Monooxide; Evaporation Grade SiO; Sublimed Silicon Monoxide; Silicon Oxide Powder
EINECS	233-232-8

Quality Control

Our Silicon Monoxide is produced and handled under stringent quality management protocols to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) detailing key parameters such as assay, metallic impurities, and particle size distribution where applicable. Our quality systems are designed to meet the exacting standards of the electronics and advanced materials industries.

Storage

Preserve in a tightly closed container, protected from light. Due to its hygroscopic (moisture-sensitive) nature and tendency to be easily oxidized, this material should be stored under an inert atmosphere (e.g., argon or nitrogen) in a cool, dry place. Recommended storage temperature is 15-25°C. The container must be kept tightly sealed when not in use to minimize exposure to air and moisture.

Specification

Item	Specification
Appearance	Brown-black powder or lumps
Assay (SiO)	≥ 99.0%
Identification (IR)	Conforms
Iron (Fe)	≤ 50 ppm
Aluminum (Al)	≤ 30 ppm
Calcium (Ca)	≤ 30 ppm
Particle Size (Typical)	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.