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 WINDOWS	SAPPHIRE WINDOWS Sapphire has a wide transmission range, spanning the three wavelength bands of ultraviolet, visible light and infrared and has hi...
	PATTERNED SAPPHIRE SUBSTRATES	Sapphire wafer is the most widely used substrate material in semiconductor lighting industry, and pattern sapphire substrate(PSS) is the general me...
	SAPPHIRE WINDOWS	Sapphire has a wide transmission range, spanning the three wavelength bands of ultraviolet, visible light and infrared and has high thermal shock r...
	CUSTOM SAPPHIRE WAFERS	CRYSCORE supplies sapphire wafers with the high-quality surfaces in all orientations (C-plane, A-plane, R-plane, sapphire m plane, N-plane, V-plane...
	LED Substrates	As a professional sapphire wafermanufacturer, CRYSCORE can provide standard or optical sapphirewafers with any orientation applied to epitaxy, as w...

Похожие товары

	Fischer Tropsch wax white granules used in candle	Продавец: Syntop chemical Co.,Ltd.	Fischer-Tropsch wax is used in various formulations of hot-melt adhesives: Low-temperature/high-...
	Mining Machinery Parts	Продавец: XINGTAI ME MINING EQUIPMENT CO.,LTD.	Mining Machinery Parts HEAVY-DUTY MINING EQUIPMENT PARTS SUPPLIER Mining Equipment Parts ...
	PH-08 Waterproof Soil PH Meter	Продавец: Коллирон электроникс лимитед	Model PH-08 Range PH 0.00～14.00PH Temp 0～50℃ Resolution PH 0.01PH Temp 0.1℃ Accuracy PH ±...
	candle raw material White Wax with low melting point	Продавец: Syntop chemical Co.,Ltd.	Lubricant wax: Fischer-Tropsch wax is widely used in the lubricants sector. It offers excellent l...
	Fischer Tropsch wax used for road marking paint	Продавец: Syntop chemical Co.,Ltd.	Fischer-Tropsch wax is widely used in road marking paints and serves as a key performance additiv...