Alumina ceramic thermal pad is a high-performance industrial ceramic plate, mainly used between power semiconductor devices (such as MOSFETs and IGBTs) and heat sinks. Its core function is to both conduct heat and insulate it, efficiently transferring heat generated by the chip to the heat sink while ensuring electrical isolation between the device and the heat sink (usually grounded), preventing short circuits.

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1. Excellent Insulation Performance

With high dielectric strength and volume resistivity, it can effectively withstand the high potential difference between power devices and heat sinks, ensuring system safety.

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2. Excellent Thermal Conductivity

The thermal conductivity of alumina ceramic is typically between 20-30 W/(m·K). This is significantly higher than that of common silicone thermal pads (approximately 0.8-5 W/(m·K)), effectively conducting heat and reducing the chip's operating junction temperature.

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3. High Hardness and Mechanical Strength

The ceramic material itself is very hard and resists deformation or tearing under the pressure of bolt tightening. It provides uniform contact pressure and a stable insulation thickness.

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4. High Temperature Resistance

It can operate in high-temperature environments (typically up to hundreds of degrees) for long periods of time without performance degradation, making it ideal for high-temperature applications in power devices.

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5. Anti-aging and Long Life

Inorganic ceramic materials are not susceptible to aging, oil production, or cracking like organic silicones, resulting in a very long service life.

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1. Single-Sided Adhesive Type

One side of the ceramic sheet is coated with thermally conductive silicone or thermally conductive pressure-sensitive adhesive. This side is attached to the heat sink, secured in place by the adhesive's stickiness; the other side (the ceramic side) contacts the power device.

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2. Double-Sided Adhesive Type

Both sides of the ceramic sheet are coated with thermally conductive adhesive. One side is attached to the device, and the other to the heat sink, making installation very convenient.

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3. Adhesive-Free Type

Contains only the ceramic sheet and requires thermal grease to secure it when tightening the screws.

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