Thermal pads (also known as thermally conductive silicone pads) are indispensable heat dissipation auxiliary components in electronic devices, primarily used to fill the gaps between electronic components and heat sinks or product casings. They possess excellent adhesion, flexibility, compressibility, and thermal conductivity, effectively expelling air between contact surfaces and ensuring full contact between electronic components and the heat dissipation structure, significantly improving equipment heat dissipation efficiency. While the operation of thermal pads is relatively simple, attention to detail is crucial; slight negligence can compromise their heat dissipation performance. The following details the correct use of thermal pads to help ensure standardized operation and optimal heat dissipation.
I. Cleaning the Contact Surfaces to Establish a Solid Foundation for Heat Dissipation
Before use, thoroughly clean the contact surfaces between the electronic components and the thermal pads, ensuring the surfaces are free of dust, oil, debris, and other contaminants. Any contaminants on the contact surfaces will reduce the self-adhesion and sealing thermal conductivity of the thermal pads, leading to insufficient contact and directly affecting heat dissipation. It is recommended to gently wipe with a lint-free cloth and anhydrous ethanol, and wait until the surface is completely dry before proceeding with further operations.
II. Proper Handling and Placement to Avoid Gasket Deformation
When handling thermal pads, the operation should be differentiated according to size: For larger thermal pads, pick them up from the middle, avoiding pulling from the edges—uneven force on the edges of large pads can easily cause deformation and warping, affecting subsequent adhesion and heat dissipation; for smaller pads, the handling method can be adjusted flexibly without strict restrictions. Handle gently during handling, avoiding pulling or squeezing the pads.
III. Correctly Remove Protective Film to Reduce Direct Contact
When holding the thermal pad, it is recommended to gently support the pad with your left hand and slowly peel off one side of the protective film with your right hand. Special attention should be paid: never peel off both sides of the protective film at the same time, and minimize the number and area of direct contact with the pad body to prevent sweat and dust from contaminating the pad and damaging its self-adhesiveness and thermal conductivity. After removing the protective film, apply the pad promptly to avoid prolonged exposure to air.
IV. Precise Application, Avoiding Air Bubbles
After peeling off one side of the protective film, align the thermal pad with the electronic component to be bonded, and slowly and steadily lower it, ensuring correct alignment. Then, use a flat adhesive sheet (such as a plastic scraper) to evenly push the pad from left to right and from the center outwards, gradually removing air from the contact surfaces. Preventing air bubbles from forming will increase the contact gap and severely affect heat transfer efficiency.
V. Promptly Remove Air Bubbles to Avoid Damaging the Pad
If air bubbles are accidentally formed during application, gently lift one end of the thermal pad and repeat the above application and pushing steps to remove the air again. Alternatively, use a hard plastic sheet to gently smooth out the air bubbles. Be sure to use gentle force during this process to avoid pulling or damaging the thermal pad, causing it to lose its original performance.
VI. Remove the Other Protective Film to Complete Assembly
After confirming that the thermal pad is firmly bonded and free of air bubbles, peel off the other side of the protective film. Peel off gently and at a uniform speed to avoid shifting, deforming, or creating new air bubbles due to pulling. After removing the protective film, quickly align the heatsink and smoothly attach it to the thermal pad.
VII. Apply Pressure to Ensure a Solid Bond:
Once the thermal pad is fully attached, apply even pressure to the heatsink to ensure full contact and tight adhesion between the pad and the electronic components/heatsink. Then, allow the device to stand for a period of time to allow the thermal pad's adhesive properties to fully develop, achieving a firm fixation and ensuring long-term stable heat dissipation.
This concludes the complete and correct usage method for thermal pads. Each step requires careful operation and attention to detail to maximize their heat dissipation effect. If you have any questions about the use of thermal pads or other adhesives, please leave a message for TENSAN, and we will answer them promptly.