🧠 Food for thought

Implications, context, and why it matters.

The foldable iPhone’s engineering hurdles go far beyond a simple hinge

• The “engineering test phase” refers to pre-production checkpoints like the Engineering Validation Test (EVT) and Design Validation Test (DVT), which devices usually clear before mass production starts 1.
• Apple’s hardest problem is a foldable display with a “nearly invisible” crease, or even no visible crease, an issue that has persisted in Samsung foldables across several generations 2.
• One approach under development uses a metal “dispersion plate” beneath the panel plus a hinge built from liquid metal, an amorphous alloy. Supply-chain sources say Apple has held exclusive rights to Liquidmetal material technology since 2010 3, 1.
• A thin build remains a priority, with a target near 4.5mm when unfolded. That goal may drive a switch from Face ID (Apple’s facial-recognition login system) to a Touch ID fingerprint sensor in the side button to save space 2.

A potential delay tests a supply chain already investing heavily

• Suppliers have started spending money, with hinge maker Yian Technology planning a 120 million yuan (US$17.4 million) capital increase for its liquid metal subsidiary to meet new orders. The move comes amid market rumors of a North American customer launching a foldable device 4.
• Any slip could shake investor sentiment, since shares of Lens Technology plus Luxshare Precision have climbed on expectations of foldable iPhone supply work 4.
• Order plans discussed in supply-chain circles run from 15 million to 20 million units. Samsung Display is expected to make about 7 million to 8 million foldable panels for Apple in 2026 4.
• Extra time also benefits rivals like Samsung, which can keep tuning foldable hardware while Apple works through these design constraints 2.