Which is the Best Thermal Pad for Laptops

Whether you are manufacturing high-performance laptops like the Intel Core Ultra 9 or entry-level Intel Core 3, each processor has unique thermal management requirements. Therefore, you must customize thermal pads for laptops to sustain the cooling demand, which will ensure optimal performance.

In this article, we will explore some of the most common thermal interface materials you can choose for your laptops.

Best Thermal Pad Materials for Laptop Cooling

· Silicone Thermal Laptop Pads

The vast majority of modern laptops utilize silicone thermal pad materials, and this is primarily because they offer excellent cooling capacities at a relatively cheaper price point. They help dissipate the heat generated by laptops by transferring the heat generated by essential components like memory chips and SSDs to the heat sink.

They are a perfect choice if you are manufacturing gaming laptops, as well as consumer and industrial laptops, since they also double up as mechanical cushions and electrical insulators.

Characteristics

• Moderate to high thermal conductivity ranging from 1.0 to 15.0 W/m·K.
• Thickness range of 0.5 mm to 5.0 mm.
• Electrically non-conductive.
• Wide operating temperature ranging from −40°C to 200°C.
• Highly compressible.
• Aging resistant.

Advantages

• Highly compressible, making them perfect for bridging the microscopic gaps between regularly and irregularly-shaped laptop components.
• Hardly leak, meaning they do not necessitate regular cleanup.
• Electrically non-conductive, consequently minimizing the risk of short-circuiting.
• They do not dry out under intense heating, making them relatively durable.
• Absorbs vibrations, making them ideal for mechanical cushioning.

Limitations

• Their thermal conductivity is comparatively inferior to that of high-end pastes and pads, making them less favored among manufacturers of laptops with extremely high densities.
• Their compressibility degrades with time, resulting in reduced heat transfer efficiency.

Key Applications

Owing to the high compressibility of silicone laptop thermal pad materials, OEM manufacturers and electronic manufacturers exploit them to manage heat between laptop components with uneven shapes and relatively bigger openings. They are particularly used in industrial, consumer, gaming, and rugged laptops to manage heating in the following components;

• SSD controllers.
• Graphic memory (VRAM).
• Memory modules.
• Voltage Regulator Modules (VRMs).

· Ceramic-Filled Silicone Thermal Pads

Electronics manufacturers, particularly those producing industrial and gaming laptops with relatively higher heat dissipation, prefer ceramic-filled silicone thermal pads. This is mainly due to their elevated thermal performance. They boast a silicone core and added traces of ceramic filler particles, making them comparatively superior to silicone thermal laptop pads.

Characteristics

• High thermal conductivity ranging from 1.2 W/m·K to 15 W/m·K.
• Material composition including a silicone polymer matrix and ceramic powder reinforcement.
• Operating temperature of −40°C and 200°C.
• Electrically insulating.
• Highly conformable.
• Soft and flexible.

Advantages

• Electrically insulating, making them safe for managing heat in laptops with dense electronic assemblies.
• Chemically stable thanks to the addition of ceramic powder, which is inherently inert.
• Can absorb mechanical shock hence, manufacturers use them for vibration dampening.
• Simple to install.
• Require no curing process.

Limitations

• Compared to metal-based laptop thermal pads, they demonstrate a lower thermal conductivity.
• Adding too much ceramic filler material can dilute the thermal performance of the ceramic-filler silicone thermal pads.

Key Applications

Ceramic-filler silicone thermal pads are not only high thermal conductivity thermal pads, but they also offer balanced properties. This has made them quite prominent among laptop repair technicians and OEM laptop manufacturers, particularly in the following applications;

• Military computers and laptops.
• Aerospace satellites.
• Industrial laptops and computers.
• Gaming systems.

· Graphite Thermal Pads

Another option you may consider for laptops is the graphite thermal pads. Graphite thermal interface materials capitalize on carbon’s excellent thermal attributes to relay excess heat from key laptop components such as the power transistors and the CPU to the respective heat sinks.

Despite lacking the thermal pad thickness for laptop cooling synonymous with silicone thermal pads, they boast a higher thermal conductivity. This makes them the preferred option for manufacturers producing laptops with significantly higher heat densities.

Characteristics

• Through-plane thermal conductivity of 10 to 40 W/m·K.
• Made of hexagonal solid carbon sheets.
• Temperature tolerance of -40°C to over 400°C.
• Electrically conductive.
• Tear-resistant.

Advantages

• Zero-phase change since they are immune to thermal degradation and drying out.
• Unlimited operational lifespan.
• Electrically safe since it leaves no sensitive residue that might cause short-circuiting.
• Ideal for dry installation.

Limitations

• Slightly costlier than alternative thermal laptop pads.
• Prone to short-circuiting if wrongfully placed or installed.

Key Applications

Graphite thermal pads for laptop cooling offer some of the best thermal properties amongst contemporary thermal cooling pads and pastes. This has made them highly sought after among computer manufacturers, IT procurement managers, and repair technicians. Their applications include;

• Industrial PCs.
• Ultra-thin laptops.
• Tablets and smartphones.
• Engine control units.
• Gaming PCs and laptops.

Comparing Different Thermal Pad Materials for Laptops

FAQs

Which is the best thermal pad for laptops?

Nailing down one type of thermal pad as the best for laptop cooling can be quite challenging given that different laptops have different heat densities. However, manufacturers and repair technicians determine the best thermal laptop pads by evaluating the respective heat dissipation demands. However, graphite, silicone, and ceramic-filled silicone pads stand out as some of the very best.

What is the recommended thermal conductivity for laptop thermal pads?

Typical consumer laptops remain cool and highly operational while using thermal pads with a conductivity range of 1–3 W/m·K, while gaming laptops work best with relatively more conductive thermal pads (4–8 W/m·K). However, high-power CPs and laptops demand relatively higher thermal conductivity, going as high as 40+ W/m·K.

Can thermal pads replace thermal paste in laptops?

Yes. Despite thermal pastes for laptop cooling receiving much hype in recent years, thermal pads are still favored by manufacturers and repair technicians. This is because they are easier to install, hardly spill, and are not prone to drying out.

How long can a laptop thermal pad last?

Laptop thermal pads are quite durable as long as they are used and placed correctly. Silicone and ceramic-filled silicone thermal pads begin to age after 2-3 years, while graphite thermal pads boast an unlimited operational lifespan.

Can laptop thermal pads be reused?

Old thermal pads for laptop cooling can only be reused if they are in perfect condition, that is, they still demonstrate their original compressibility and thickness. However,  most manufacturers advise against reusing aged thermal pads since they are less likely to perform optimally.

Final Thoughts

Choosing the right thermal pad material will improve laptop cooling efficiency, optimize processing power, and increase component lifespan. Whether you are manufacturing OEM laptops or operating a repair workshop, Gallop offers a range of thermal pad materials.

Let us know your project specifications, and our team will recommend a suitable material – Contact our team now.