Leaker: Foldable 'iPhone Ultra' Will Feature Liquid Metal Hinge

Apple's first foldable i Phone will feature an innovative liquid metal hinge and has now shipped prototype units to carriers around the world for testing, the leaker known as "Fixed Focus Digital" today said. In a new post on Weibo, Fixed Focus Digital said development and production related to the foldable are now "progressing rapidly." The claim arrives one day after the leaker reported that the foldable i Phone would feature vapor chamber cooling. The liquid metal hinge detail is significant in light of the ongoing debate over the device's production difficulties. Earlier reports from the leaker known as "Instant Digital" attributed manufacturing problems to the hinge failing Apple's quality control standards under prolonged, high-frequency open-and-close testing. Fixed Focus Digital previously pushed back on that characterization, arguing the hinge was not the primary source of difficulty, and today's post appears to position the hinge as a resolved and confirmed element of the design. Liquid metal is an amorphous metal alloy with a notably higher strength-to-weight ratio than conventional metals, along with superior resistance to corrosion and wear. Apple has used liquid metal in limited contexts before, most notably for the SIM ejector tool included with iPhones and for certain internal components, but its application in a structural hinge mechanism would be a far more demanding use of the material. The foldable iPhone is expected to fold and unfold hundreds of thousands of times over its lifespan, placing exceptional stress on the hinge, and liquid metal's durability properties make it a more capable material than conventional alloys. Apple's history with liquid metal stretches back over 15 years. In 2010, Apple signed an exclusive deal with Liquidmetal Technologies, receiving a perpetual worldwide license to commercialize the material in consumer electronics. In the years that followed, the company used liquid metal only for minor components such as the SIM ej