Xerendipity has demonstrated a new thermal pad embedded with a vapour chamber that dissipates between 800 and 1,200 watts per metre-Kelvin of heat, compared to the 15 W/m-K capability of traditional thermal pads, delivering 50 to 80 times higher thermal conductivity in the same space while remaining as simple to apply as a regular thermal pad.
The technology, called the Vapor-Pad, was showcased at Mobile World Congress. The Vapor-Pad is essentially a sticker with a vapour chamber, engineered for thermal reasons. The Vapor-Pad is positioned between the CPU and its heatspreader, coming into direct contact with the silicon to act as an optimal thermal buffer.
The appeal lies in a genuine engineering trade-off. Traditional thermal pads are cheap and convenient but conduct heat poorly. Vapour chambers, which cycle liquid to gas and back to spread heat efficiently, offer superior performance but require custom design for each device and cost significantly more. Thermal pads are inexpensive and convenient but lack the thermal conductivity of vapour chambers, which are custom-built for each device and costlier with higher research and development requirements, so the Vapor-Pad offers a hybrid solution.
Xerendipity also claims its non-metal vapour chamber has 90 per cent of the thermal conductivity of a regular vapour chamber with a 100 per cent signal pass-through rate, and is approximately 80 per cent lighter than copper. This matters because the antenna lines on modern phones serve to boost signals and work around metal vapour chambers, but with a non-metal vapour chamber, the entire phone can be packed with the cooling solution without signal problems, and the lack of metal means heat cannot be dissipated through the device's surface as efficiently, which will reduce skin temperatures.
Yet broader context matters here. Apple and Samsung have taken different approaches to solving overheating issues in their smartphones: with the release of the iPhone 16, Apple opted for graphene thermal pads, whilst Samsung continues to use vapour chamber cooling. Graphene thermal pads offer a significant advantage in cost, as graphene is relatively inexpensive to produce compared to vapour chambers, making it a more economical option for mass production. Graphene sheets are incredibly thin and lightweight, allowing Apple to save valuable internal space in the iPhone.
Xerendipity is a relatively unknown newcomer in an otherwise very saturated market and the company does not really have an online presence, though both products do seem production-ready and not just prototypes. The true test will come when smartphone manufacturers begin integrating the technology into commercial devices. For now, Xerendipity's engineering demonstrates that thermal management remains a critical battleground in smartphone design, where the pressure to make devices thinner and more powerful continues to drive innovation.