Cover tape is a tape-like product utilized in the electronic component assembly industry. It is used in conjunction with carrier tape to form a sealed package, thereby protecting components-such as resistors and capacitors-from contamination and electrostatic damage. The base material typically consists of polyester or polypropylene film, laminated with functional layers-including an anti-static layer and an adhesive layer-to seal the surface of the carrier tape through the application of heat or pressure.
Based on their sealing mechanisms, these products are categorized into heat-activated cover tape (bonded via heat), pressure-sensitive cover tape (bonded at ambient temperature), and universal cover tape (which employs mechanical grooving technology to control peel force). Key performance metrics include peel force stability (influenced by grooving depth and base film strength), surface resistivity (indicating anti-static grade, typically within the range of 10⁶ to 10⁸ Ω), light transmittance (which must be sufficient to facilitate the visual identification of component markings), and tensile strength.
