LG Innotek Develops Ultra-Large AI Substrate

LG Innotek is jointly developing a 120mm ultra-large flip-chip ball grid array (FC-BGA) substrate with a North American big-tech customer, aiming to complete development next year and pursue mass production. The company is reviewing additional investment in its Gumi and Vietnam plants and targeting 1 trillion won operating profit from the substrate business by 2031.

LG Innotek Develops Ultra-Large AI Substrate Per Seoul Economic Daily, LG Innotek is jointly developing a 120mm ultra-large flip-chip ball grid array FC-BGA substrate with a North American big-tech customer. The company held a Media Tech Day where it said, "We are jointly developing a 120mm ultra-large flip-chip ball grid array FC-BGA substrate with North American customers," adding, "We expect results around next year." Seoul Economic Daily reports LG Innotek aims to complete development next year and pursue mass production. The report also states the company is "reviewing additional investment in Gumi, Vietnam plants" and is targeting 1 trillion won operating profit in the substrate business by 2031 . What happened Per Seoul Economic Daily, LG Innotek is jointly developing a 120mm ultra-large flip-chip ball grid array FC-BGA substrate with a North American big-tech customer. Seoul Economic Daily reports LG Innotek held a Media Tech Day and said, "We are jointly developing a 120mm ultra-large flip-chip ball grid array FC-BGA substrate with North American customers," adding, "We expect results around next year." The article reports the company plans to complete development next year and pursue mass production. Seoul Economic Daily also reports LG Innotek is "reviewing additional investment in Gumi, Vietnam plants" and is targeting 1 trillion won operating profit in the substrate business by 2031 . Editorial analysis - technical context FC-BGA substrates are high-density package substrates that connect GPUs, CPUs, and other AI accelerators to system boards while improving signal integrity, thermal performance, and integration density. Industry-pattern observations: moving from smaller substrate formats to an ultra-large 120mm footprint typically supports larger multi-die packages, higher I/O counts, and improved heat spreading, but also raises yield and warpage control challenges during fabrication. Industry context Industry reporting frames the project as part of broader supply-chain competition between suppliers in Japan, Taiwan, and Korea for advanced package substrates. Industry observers note that big-tech demand for higher-performance AI accelerators has raised interest in larger, more integrated substrates that reduce interposer complexity and improve system-level performance. What to watch Track confirmation of the unnamed North American partner in regulatory filings or vendor disclosures, official development milestones from LG Innotek, and any announcements about capacity investments in the reported Gumi and Vietnam sites. Observers should also monitor yield reports and qualification timelines if LG Innotek publishes technical milestones for a 120mm FC-BGA line. Note on sourcing All company-specific development timelines, quotes, investment reviews, and profit targets in this item are reported by Seoul Economic Daily. Scoring Rationale A co-development announcement from Korean media for an ultra-large 120mm FC-BGA substrate targeting North American big tech is notable for AI hardware supply chain observers. Single named outlet as primary, unnamed partner, and development-stage timeline limit immediate practitioner impact below mid-tier funding or product announcements. Practice interview problems based on real data 1,500+ SQL & Python problems across 15 industry datasets — the exact type of data you work with. Try 250 free problems /problems