Seoul/Beijing – January 13, 2026
Korean display makers Samsung Display and LG Display are seriously looking at jumping into the semiconductor glass substrate business, according to industry sources speaking to local media. They're particularly interested in the "glass interposer" side of things, which has a lot of similarities to the processes they already use for making OLED panels.
The basic reason? The display industry is pretty much maxed out. Phones, TVs, even cars and wearables aren't growing fast enough anymore, and competition is brutal. So these companies are hunting for the next big thing, and glass substrates for chips look like a promising new battlefield.
What's a glass substrate? In simple terms, it's a next-generation packaging material for semiconductors. Instead of using organic (plastic-like) materials in the core of high-end chip packages, you use glass. It handles heat better, doesn't warp as much, and is ideal for the powerful AI chips and memory everyone's racing to build.
Samsung and LG aren't starting from scratch. They've been working with glass for years on foldable phone screens, so they know how to handle super-thin glass (called UTG) and make it stronger and more reliable. That experience could give them a real advantage.
Inside Samsung Display, people say the company already feels comfortable with the technology because they've been dealing with glass forever. Right now they're running tests to see if the business actually makes money. LG Display has quietly been doing glass substrate research for years too.
This push also lines up with what other parts of the Samsung and LG groups are doing. Samsung Electro-Mechanics already has a pilot production line running at its Sejong factory, making sample glass core substrates. LG Innotek announced last year that it's getting into the game, set up its own test line in Korea, and is working with partners to speed things up.
But here's the pressure point: China's BOE is already ahead. Last year BOE started buying all the key equipment-automated inspection machines, laser tools, copper plating systems-and got an 8-inch pilot line running late last year. They're planning to start real mass production this year and aim to have high-performance products ready by 2027. BOE is basically using its existing display factories and know-how to rush into this semiconductor area, and it's working.
Korean companies can't afford to sit back. If BOE locks in big customers (especially the AI chip giants), it could be another painful repeat of what happened in the display market years ago.
That said, not everyone thinks it's going to be easy. Display companies are great at processing large sheets of glass on the surface, but some of the trickiest steps-like drilling tiny holes through the glass (called TGV) or plating metal inside them-are different technologies that usually belong to laser or etching specialists. So even if Samsung and LG jump in, they'll probably need to team up with other companies rather than trying to do everything themselves.
One industry insider put it bluntly: "Their technical skills are solid, and they have every reason to take this seriously. But in the full supply chain, their exact role isn't 100% clear yet."
Bottom line: the long-running battle between Chinese and Korean display makers is now spilling over into glass substrates. Whoever gets production scaled up first and wins the big semiconductor customers could end up dominating this next big chapter in electronics. It's still early days, but the race is definitely on.
