Alumina Ceramic Substrate for Film Integrated Circuit

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Shaanxi Puwei Electronic Technology Co., Ltd

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Alumina Ceramic Substrate For Thin Film Integrated Circuit

Alumina ceramic substrates are used in lots of ways in the electronics industry, especially for thin and thick film integrated circuits. These substrates are made from alumina (Al2O3). They're famous for having really good conductivity, being strong mechanically, and being able to resist high temperatures well.

Properties of Alumina Ceramic Substrates

Alumina ceramics can be divided into two types: high-purity ones and ordinary ones. High-purity alumina ceramics have 99.9% or more Al2O3 in them. They're used in situations where high sintering temperatures are needed and for specific transmission wavelengths. Ordinary alumina ceramics are grouped according to the amount of Al2O3 they contain, like we have 99 porcelain, 95 porcelain and so on.

High-Purity Alumina Ceramics

High-purity alumina ceramics are used in the electronics industry. For example, they're used as substrates for integrated circuits and as high-frequency insulation materials. They're also used in sodium lamps because they can resist the corrosion of alkali-resistant metals. The temperature needed to sinter these ceramics is really high, between 1650 and 1990 °C. And instead of using platinum crucibles, they're often used with molten glass.

Ordinary Alumina Ceramics

Ordinary alumina ceramics like 99 porcelain and 95 porcelain are used because they can resist corrosion and wear well. They're also used in electric vacuum devices because their electrical properties and mechanical strength have been improved.

Manufacturing Process

To make high-purity alumina ceramic substrates, there are processes like tape casting and warm pressing. These processes can make the microstructure and density of the green tape and the ceramic substrate better. Chemical surface modification is used to stop the powder from clumping together, so that the ceramics turn out more uniform. The sintering temperature and the size of the powder particles have a big impact on the final product's properties. For example, a 99.6% alumina ceramic substrate that's sintered at 1550 °C using 100 nm modified powders has really good relative density and thermal conductivity.

Applications in Integrated Circuits

Alumina ceramic substrates are used in low to medium power DC/microwave circuits that use Si, GaAs or GaN ICs. They're also used in edge-coupled filters and power dividers because they're cost-effective and can be used in many different situations. The dielectric constant of alumina is 9.9 at 1 MHz, and it has a low loss tangent, which makes it suitable for high-frequency applications.

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Shaanxi Puwei Electronic Technology Co., Ltd

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Main Product: Alumina Ceramic Substrates, Aluminum Nitride Substrates , Metallized Ceramics, AlN Ceramics Disc, DPC Substrate, DBC Ceramic Substrate

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