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Haouger Tech Waterproof ESD Protection Tape (also known as SIM Card Spacer Tape) is a precision tape product specifically designed to provide multi-layered protection for SIM card trays, memory card slots, or the surrounding areas of connectors within smartphones, IoT devices, wearables, and industrial electronic modules. It integrates three key functions—Electrostatic Discharge (ESD) protection, waterproof sealing, and precise spacing—effectively addressing common challenges in the miniaturization of electronic devices, such as electrostatic breakdown, liquid ingress, and inter-component gap control.
ESD Protection Performance: The tape's surface resistance is controlled within the range of 10⁶ to 10⁹ Ω, allowing for the safe dissipation of static charges. This prevents static electricity from causing damage via SIM card contacts or surrounding sensitive components, meeting the requirements of the ANSI/ESD S20.20 standard.
Waterproof Sealing Rating: Utilizing an acrylic or polyurethane adhesive system, the tape forms a tight seal against the SIM card slot or device housing surface. This achieves an IPX7 waterproof rating (withstanding immersion in 1 meter of water for 30 minutes), effectively preventing sweat, rain, or accidental spills from entering the device's interior.
Precise Thickness Spacing: Available in various thickness specifications—including 0.05mm, 0.1mm, 0.15mm, and 0.2mm—the tape serves as a precise spacer or shim. This ensures the correct compression force between the SIM card and the metal shielding cover or device housing, thereby preventing poor contact issues.
Residue-Free & Temperature Resistance: After undergoing aging tests at 80°C/85% RH, the tape leaves no adhesive residue upon removal. It operates within a temperature range of -40°C to +120°C and is capable of withstanding standard reflow soldering processes (short-term exposure up to 260°C).
Substrate Options: Available with a choice of PET (Polyester Film) or Polyimide (PI) substrates; the PI substrate offers superior temperature resistance and tear strength.
Smartphones/Tablets: Waterproofing and ESD isolation gaskets for the interior of SIM card trays.
Smartwatches/Wearables: Gap filling and sealing for eSIM or Nano SIM card slots.
IoT Modules: Peripheral protection for SIM card holders within 4G/5G communication modules.
Industrial Control Equipment: Protection against electrostatic interference and the ingress of dust or moisture.
Automotive Electronics: SIM card protection for in-vehicle emergency call systems (eCall).
Haouger Tech offers precision die-cutting services, allowing us to customize shapes—including circles, squares, and irregular cutouts—to precisely match the contours of your SIM card holder or the dimensions of your device's housing recess. We can also supply materials in roll or sheet formats compatible with automated assembly equipment. We provide samples within as little as 3 days, with mass production deliveries available within 7 days.
1. How does this waterproof ESD tape differ from ordinary double-sided tape?
Ordinary double-sided tape does not provide ESD protection and has limited water resistance. Our tape is specifically designed for electronic devices:
It features a controllable surface resistance (10⁶–10⁹ Ω), safely dissipating static electricity to prevent breakdown of SIM card chips.
The adhesive layer and substrate have been optimized to form a long-lasting waterproof barrier after application, passing IPX7 testing.
With a thickness tolerance of ±0.01 mm, it can be used as a precision spacer. Additionally, even after aging under high-temperature and high-humidity conditions, the tape can be peeled off without leaving residue, ensuring no contamination of the SIM card contacts.
2. Can this tape withstand reflow soldering temperatures?
Yes. We offer a polyimide (PI) substrate version that can withstand peak temperatures of 260°C (one reflow cycle) without the adhesive layer bubbling or peeling off. The PET substrate version is recommended for use in environments below 150°C. If you require reflow soldering, please specify the PI + high-temperature-resistant acrylic adhesive combination when ordering.
3. How does the tape achieve waterproofing? Does it require specific structural design?
The tape itself provides an adhesive seal, but the final waterproof rating (e.g., IPX7) depends on the following factors:
The contact surface between the SIM card tray or housing and the tape must be flat, clean, and free of oil or grease.
The tape needs to be compressed by a certain percentage (typically 20%–30%), meaning you should select a tape thickness slightly greater than the gap.
We recommend incorporating a double-step structure or sealing ribs into the design. We can provide application design recommendations and sealing simulation support.
4. Does the ESD protection performance of the tape degrade over time?
No. The ESD functionality is achieved through a permanent antistatic layer on the tape’s surface or internal conductive fillers. It is not dependent on environmental humidity, and after 1,000 hours of dual-85 aging testing (85°C/85% RH), the surface resistance remains within the range of 10⁶ to 10⁹ Ω. We can provide third-party test reports.
