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High Temperature Electronic Grade Adhesive Tapes: Critical Roles in Component Soldering and Assembly

2026-06-25

High-temperature adhesive tapes have been developed specifically in order to withstand high temperatures without losing their ability to adhere or remain structurally stable. These tapes are widely used for their high-temperature resistance in the manufacturing, automotive, electronics, and aircraft design industries.

In this guide, we'll explore everything you need to know about these adhesive tapes, including their composition, applications, and what makes them useful under extreme heat conditions.

Working Principle and Performance Boundaries of High-Temperature Electronic Tapes

High-temperature adhesive tapes consist of several layers with different functions. The backing film determines the strength of the tape and its maximum operating temperature, while the adhesive layer is responsible for tape performance and its removal. Lastly, the release liner plays a protective function by safeguarding the adhesive until the tape is applied.

Polyimide films, known under the trade name Kapton, are preferred in high-temperature electronic tapes as backing because they demonstrate temperature stability in a wide temperature range while remaining rigid at temperatures up to 500°C.

The glass-cloth backing film expands the temperature range even further. Specifically, such films are used for soldering in heat sink areas. When talking about adhesives, there are two commonly used types. Silicone formulas are preferred for their high-temperature stability. Acrylic adhesives, on the other hand, may be used in lower temperature ranges.

High Temperature Electronic Grade Adhesive Tapes: Critical Roles in Component Soldering and Assembly 1

Application of Tapes in Reflow Soldering and Wave Soldering Processes

Reflow soldering and wave soldering remain the primary methods for placing components on a PCB (Printed Circuit Board). They put very different kinds of stress on the tape needed for these processes to work. In reflow soldering, surface-mounted components are first secured to the board. Then the assembly passes through a multi-stage furnace where the temperature in some zones exceeds 260°C.

For such applications, the polyimide tape should have sufficient adhesive strength to secure fine-pitch components as the board temperature rises; yet after the process, it will not leave any adhesive residue and will easily detach without damaging the pads or pad surfaces.

The wave soldering process involves dragging the bottom side of the board across a wave of liquid metal alloy at about 250°C.

Here, masking tape placed over connectors, switches, and through-hole regions must withstand both the high temperatures of liquid metal and the force applied to the board by the solder wave. If even a small section of the tape were to detach, allowing solder to flow into the region, the resulting defect may require further rework of the board.

At the same time, the adhesive should resist moisture and softening caused by flux.

Application of High-Temperature Tapes in Gold Finger Protection and Masking

Gold fingers, also known as gold-plated connectors, are the most delicate components of the assembly, as their primary purpose is to ensure low-resistance connections that do not oxidize or corrode. Anything that comes into contact with gold fingers during assembly can impair connector performance or even cause intermittent failures in use. Since contamination-related defects in gold fingers are often hard to spot during visual inspection, protecting them during assembly becomes vital.

For this purpose, high-temperature masking tape is placed over connectors before the PCB is run through a wave soldering, selective soldering, or conformal coating process. The tape is subsequently removed once heat treatment is completed.

Masking tape should consist of a thin layer of conformable material, such as polyimide or polyester, combined with a silicone or acrylic adhesive chosen for its resistance to adhesion. This property allows easy removal of the tape; once the assembly is complete, the tape remnants can produce the same results as the contaminants they were supposed to prevent.

Similarly, switches and other components unsuitable for conformal coating also require masking during assembly.

Three Core Factors Affecting the Service Life of High-Temperature Tapes

First, it is not the peak temperature but thermal cycling that matters. While high-temperature tapes can withstand a single exposure to their maximum temperature, they will fail much earlier if subjected to repeated heating and cooling cycles, as expansion and contraction eventually weaken the bond between the tape and the surface to which it is adhered.

Furthermore, high-temperature tapes may be damaged not only by excessive temperatures but also by chemical exposure from fluxing materials, solvent-cleaning solutions such as isopropyl alcohol, or coating chemicals that affect the adhesive chemistry or the substrate material.

Lastly, mechanical damage to the tape can occur during installation or disassembly. For example, tape stretched and fixed along sharp edges, or removed improperly, is likely to become damaged long before it reaches the threshold for thermal cycling.

High Temperature Electronic Grade Adhesive Tapes: Critical Roles in Component Soldering and Assembly 2

Six Key Operational Points during the Use of High-Temperature Tapes

The following key points address the important issues in the practical use of a high-temperature tape:

Make sure that the surface for the tape application is clean and dry. Any dust particles, oils, or moisture on the PCB will impair adhesion quality, regardless of how high the tape's operating temperature rating is.
Use tape compatible with the highest temperature reached at the point of application, since the maximum temperature varies depending on the reflow profile and the temperature of the wave soldering pot.
Apply the tape at an angle using a squeegee to squeeze out as many air bubbles as possible, since they will expand during heating and raise the tape edge.
Avoid stressing the tape when applying it, as the tension stored in the backing could be released when the adhesive becomes soft due to heat.
Remove any temporary mask immediately after completing the high-temperature process, while the PCB is still somewhat warm, since the risk of adhesive transfer increases with time at high temperatures.
Keep unused tape rolls in a cool, dry place, since heat-resistant adhesive still reacts to environmental influences before the tape is put into use.

Are you an electronic manufacturer looking for quality electronic-grade tapes? Crown Adhesive Tape has got you covered. Crown Adhesive Tape is a reputable tape and adhesive supplier working with manufacturers from different industries to ensure quality production.

Check our list of electronic-grade tapes or contact us to discuss your adhesive tape needs.

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