SILICON ON SAPPHIRE

• 

A Brief Introduction of Silicon on Sapphire Technology

Silicon on sapphire (SOS) technology is a hetero-epitaxial process for metal-oxide-semiconductor (MOS) integrated circuit (IC) manufacturing that consists of a thin layer (typically thinner than 0.6 µm) of silicon grown on a sapphire (Al2O3) wafer. SOS is part of the silicon-on-insulator (SOI) family of CMOS (complementary MOS) technologies. Typically, high-purity artificially grown sapphire crystals are used.

The silicon is usually deposited by the decomposition of silane gas (SiH4) on heated sapphire substrates. The advantage of sapphire is that it is an excellent electrical insulator, preventing stray currents caused by radiation from spreading to nearby circuit elements. SOS faced early challenges in commercial manufacturing because of difficulties in fabricating the very small transistors used in modern high-density applications.

This is because the SOS process results in the formation of dislocations, twinning and stacking faults from crystal lattice disparities between the sapphire and silicon. Additionally, there is some aluminum, a p-type dopant, contamination from the substrate in the silicon closest to the interface.

Silicon on Sapphire Technology

Why is Silicon on SapphireTechnology So Important to Integrated Circuit

Due to sapphire has high permittivity that can eliminate the interaction between components of the integrated circuit, not only can reduce leakage current and parasitic capacitance, enhance radiation resistance and reduce power consumption but also can improve the level of integration and two-layer wiring, thus, sapphire is the ideal material for large scale and very large scale integrated circuit.

Silicon on sapphire technology provides ideal isolation and reduces the parasitic capacitance at the bottom of the PN junction, so it is suitable for high-speed large scale integrated circuits to achieve high speed and low power consumption. This process is generally used to make CMOS circuits.

In addition, in the SOS microelectronic circuit design and production, all kinds of semiconductor devices usually need to make on the structural integrity silicon thin film, and because thermal expansion coefficient of silicon is similar to sapphire, a silicon monocrystalline film (100) can be grown on the surface orientation(1-102) of the sapphire substrateby heteroepitaxy.

At present, sapphire crystal has become a widely used substrate for the growth of semiconductor materials.

CRYSCORE OPTOELECTRONIC LIMITED has been a professional manufacturer specialized in high-qualitysos wafers, silicon on sapphire wafersand sapphire opticswindowsand etc.Want to know more? Please contact us.

Другие товары поставщика

	SAPPHIRE WAFERS / SAPPHIRE SUBSTRATES	Due to the less mismatched lattice and stable chemical and physical properties, sapphire(Al2O3) wafer is the popular substrates for III-V nitrides,...
	CUSTOM SAPPHIRE WINDOWS	Due to the extensive applications of sapphire in various fields, different dimensions are required. CRYSCORE can provide custom sapphire windowswit...
	GaN on Sapphire	As a professional sapphire wafermanufacturer, CRYSCORE can provide standard or optical sapphirewafers with any orientation applied to epitaxy, as w...
	CUSTOM SAPPHIRE WINDOWS	Due to the extensive applications of sapphire in various fields, different dimensions are required. CRYSCORE can provide custom sapphire windows wi...
	PATTERNED SAPPHIRE SUBSTRATES	Sapphire wafer is the most widely used substrate material in semiconductor lighting industry, and patterned sapphire substrate(PSS) is the general ...

Похожие товары

	Beeswax used for candle processing	Продавец: Syntop chemical Co.,Ltd.	The advantages of beeswax candles are quite notable: Natural ingredients: Beeswax is a natural s...
	Greentech GR220 Electric Star Feeder | Rotary Airlock Valve Seals for Pneumatic Conveying Systems 6 Months Warranty 310kg	Продавец: Greentech International (Zhangqiu) Co., Ltd	Customized Support: Tailored solutions for industrial machinery needs. High-Quality Electric P...
	Bottle Cap Mold	Продавец: Taizhou Qihong Mold Co., Ltd.	Bottle Cap Mold is designed for precise and consistent plastic cap production, supporting differe...
	High quality beeswax used in craft production	Продавец: Syntop chemical Co.,Ltd.	Beeswax has a wide range of uses in handicrafts, appearing in everything from traditional candles...
	FT wax used for EVA-based hot melt adhesive	Продавец: Syntop chemical Co.,Ltd.	Fischer-Tropsch wax is a commonly used performance modifier in hot melt adhesives, especially for...