Kapton tape is a special protective tape designed for the gold finger area of printed circuit boards (PCBs). It is made of high temperature resistant and antistatic polyimide (PI) or PET substrate. Its core function is to prevent the gold polyimide from being damaged by friction, oxidation, and dust pollution during welding, transportation, or assembly, and to ensure the stability and reliability of signal transmission of electronic equipment.
Key features:
High temperature resistance: withstand short-term high temperatures of 260℃~300℃ (such as the reflow soldering process).
Low residual viscosity: no residual glue after tearing off, protecting the surface finish of the gold polyimide.
Antistatic design: avoid static electricity accumulation and damage to sensitive electronic components.
Precise size adaptation: customizable width (common 3 mm- 50 mm) and thickness (0.05 mm- 0.15 mm).
Core application scenarios of the Kapton tape
SMT welding protection
Cover the polyimide in surface mount technology (SMT) to prevent solder splash or flux contamination.
PCB transportation and storage
Encapsulate the bare board gold finger to avoid oxidation caused by transportation friction or environmental moisture.
Electronic assembly process
Isolate the gold finger from metal tools during the assembly process to reduce the risk of a short circuit.
High-precision instrument manufacturing
Used for dust and oxidation protection of aerospace electronic components.
Repair and rework
Temporarily cover the gold finger to avoid secondary damage during repair.
Technical advantages of Kapton tape
Ultimate protection performance
Nano-coating technology is used to reduce the molecular adsorption of the tape and the gold layer, and there is no damage when tearing it off.
Environmental adaptability
Oil-resistant, acid-resistant, and alkali-resistant, suitable for complex industrial environments (such as automotive electronics production lines).
Efficient cost control
Reduce the scrap rate caused by gold finger contamination, and reduce the overall cost by more than 30%.
How to choose a cost-effective Kapton tape?
Substrate type
Polyimide (PI): Excellent high temperature resistance, suitable for reflow soldering scenarios.
PET material: Lower cost, suitable for general packaging needs.
Adhesive type
Silicone series: High temperature resistance but higher cost;
Acrylic series: Balance viscosity and cost performance.
Industry trends and innovation directions
Demand for miniaturized electronics: With the popularization of 5G chips and wearable devices, the demand for ultra-narrow (<2mm) gold finger tapes is growing.
Environmental upgrade: Halogen-free and degradable adhesives have become the mainstream trend (such as EU REACH regulations).
Intelligent production: The tape comes with a color mark or QR code to facilitate the identification and positioning of automated equipment.