Samsung details the innovations that enabled it to make the Galaxy S25 Edge so thin and light

The Samsung Galaxy S25 Edge is now available in many parts of the world, after making its debut a few days ago. Samsung says that this is “more than a design milestone”, it is also a solution to long-standing issues in smartphone engineering.

Samsung Galaxy S25 Edge

The company has described the innovations that allowed it to fit a Snapdragon 8 Elite and a 200MP camera inside a phone that measures only 5.8mm thick and weighs 163g.

The Galaxy S25 Edge is 5.8mm thick and weighs 163g

The exterior is a robust titanium frame, similar to the S25 Ultra. The 6.7” LTPO display on the front is protected by Gorilla Glass Ceramic 2 (available exclusively on the S25 Edge for now), the back is guarded by Gorilla Glass Victus 2.

A titanium frame and GG Ceramic 2 are used for a durable design

But it’s inside where innovation starts. Samsung had to develop a new mounting system for the internal structure of the phone, allowing it to place components with 0.1mm precision. It went through multiple prototypes until the design was just right.

The two-layer camera housing of the Galaxy S25 Edge

The engineers shaved off more than 10% off the thickness of the 200MP camera by optimizing the autofocus and optical image stabilization hardware. They also designed a two-layer camera housing that further helps offset the module’s height. Here’s the result compared to the Galaxy S25 Ultra, which also has a 200MP camera.

Samsung Galaxy S25 Ultra (left) and S25 Edge (right)

The S25 Edge is powered by the Snapdragon 8 Elite for Galaxy, like the rest of the S25 family. Its thin frame makes cooling a bigger issue, though, so Samsung added a larger vapor chamber (10% bigger than the one in the S25+) and introduced a “hole structure” design.

The “hole structure” cooling design of the Galaxy S25 Edge

This is a big cutout in the metal frame of the phone that allows for a more direct connection between the chipset and the vapor chamber. There is also a tailored thermal interface that wicks up heat from other components.

Was Samsung successful in its task of keeping the Galaxy S25 Edge running fast under sustained load? The company is happy with the result, but our tests show that it wasn’t enough – even the S25+ with its smaller vapor chamber holds out better during longer tests.

Samsung Galaxy S25 Edge

Check out our written and video reviews of the Samsung Galaxy S25 Edge for our thoughts on the new slender flagship.

Looking to the future, rumor has it that Samsung will take what it learned from designing the S25 Edge camera and apply it to the S26 series. The upcoming Galaxy Z Fold7 is said to be impressively thin, perhaps borrowing ideas from the S25 Edge design.