Thermally conductive double-sided tape typically consists of a substrate, an adhesive, and thermally conductive or functional fillers. To enhance performance, the adhesive is often loaded with highly thermally conductive ceramic particles.
These materials impart a range of key properties to the tape, including high thermal conductivity and electrical insulation, low thermal impedance, strong adhesion and holding power, excellent weather resistance, conformability, eco-friendliness (non-toxicity), and ease of application. With a thermal conductivity typically ranging from 0.8 to 1.6 W/m·K, the tape efficiently transfers heat to the heat-dissipating structure. The adhesive layer ensures a strong bond to components. Additionally, the tape offers flexibility and conformability, allowing it to fill minute gaps between contact surfaces, while also exhibiting self-adhesive properties and a high compression ratio.
Among these components, the thermally conductive fillers directly determine thermal efficiency; acrylate or silicone adhesives provide the core bonding and flexibility characteristics; and substrates such as glass fiber reinforce the product's mechanical strength. Some high-end products utilize fillers like modified aluminum nitride to further optimize thermal conductivity, insulation, and heat resistance.