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Ibiden Co., Ltd.
Ibiden makes the specialized circuit boards and chip packages that sit inside computers, smartphones, and cars, plus ceramic parts for industry.
Ibiden makes the hidden plumbing of modern electronics. Its most important product is a package substrate — the tiny, incredibly complex board that a computer chip sits on and that connects the chip to the rest of the device. Building one is like building a miniature city of microscopic wires: the substrate must route thousands of electrical signals through dozens of layers without losing speed or corrupting data. Few companies in the world can do this well, and Ibiden is one of the biggest.
The company's history is a good story. It started in 1912 as a maker of ceramics, and for a long time its main claim to fame was as the world's biggest maker of ceramic filters for diesel engines and power plants. Then it parlayed its ceramic know-how into the electronics business, and today the package substrates are what really drive the company. It has poured huge amounts of money into new factories to meet demand from NVIDIA, whose AI chips need enormously complex substrates, and from Apple, which uses Ibiden parts in its devices. The engine room is fairly concentrated. Its biggest customers are chipmakers and their suppliers, and the substrate business has become tightly tied to the boom in AI data centers. The company has said it plans to spend well over a trillion yen on new factory capacity, mostly for substrates, which is a huge bet that the AI buildout keeps going. That kind of spending is a strength — it locks in customers who need a partner with deep pockets and technical skill — but it is also a vulnerability. If demand cools, those factories sit idle and the bills keep coming.
Ibiden also sells ceramic products for industrial uses, such as diesel particulate filters that trap soot from engines, and other ceramic parts. That business is steadier and more cyclical than the AI story, tied to trucks, power generation and environmental regulation. It also makes graphite products and some other electronic components. The substrate business is the star, though, and it has turned a century-old ceramics firm into one of the most important, least-known suppliers in the global tech supply chain.
Saved answer · last researched 12 Nov 2026
BIG PICTURE
One customer supplied nearly 30% of Ibiden's sales last year
- 29.4% Nvidia
- 70.6% All other customers
Nvidia alone paid for 29.4% of everything Ibiden sold in the year to March 2026, up from 20.3% the year before. Ibiden makes the stiff little boards that sit under the most advanced AI chips, and it supplies more than 80% of cutting-edge GPUs. That is a powerful position, and a lopsided one: if Nvidia slows its orders, Ibiden feels it fast. Source: World Business Watch, data from 2026
Timeline
A River Town Starts a Power Company
Ibiden began in 1912 as Ibigawa Electric, a hydroelectric power business built on the Ibigawa River to revive the local economy. A few years later, rather than waste the electricity it made, the company started electric furnaces to produce carbide and ferroalloys, and in doing so turned itself into a manufacturer. Then, in 1938, the government forced it to hand over its transmission and distribution facilities, which ended the power business entirely and pushed the company toward electrochemicals and materials.
The Ground Shifts Under Carbide
Petrochemical advances wiped out demand for organic synthesis, the main market for carbide, and melamine production was stopped. The oil crisis then made electric-furnace operations unviable as electricity costs soared. The company decided it needed a new business sphere and weighed three candidates: printed wiring boards, special carbon products, and ceramic fiber.
Betting on Three Products
The 1973 oil crisis hit the construction materials business hard, putting survival at stake, so management focused resources on three priority products: printed wiring boards, special carbon products, and ceramic fiber. That same year it developed COB, chip on board, the base for the flip chip packages that would come much later.
A New Corporate Name
On its 70th anniversary, the company changed its name to IBIDEN CO., LTD. Until then it had been known as Ibigawa Electric Power Co., Ltd.
Into IC Substrates
Ibiden started making plastic IC package substrates, entering the IC substrate field, and set up a sales branch in the United States. Production of the plastic IC package substrate at the Gama Plant began in 1988.
Listed on the Tokyo Exchange
Ibiden listed its shares on the Tokyo Stock Exchange. The first public offering date was listed as January 1, 2001.
Kawashima Takes the Top Job
In 2024, President Aoki moved to Chairman and Managing Officer Koji Kawashima became President. Kawashima was a career employee who had joined in 1987 and served as Director and Corporate Officer, and he took over after a slump year when net sales and operating income had fallen sharply.
The Ono Plant Opens
The Ono Plant held its opening ceremony and began mass production, positioned for AI server substrate production. That same year, Ibiden was newly added to the Nikkei Stock Average 225 index.
A Five-Hundred-Billion-Yen Bet on AI
Ibiden decided on a roughly 500 billion yen capital investment over three years to expand high-end IC package substrate capacity, starting with about 220 billion yen at the Gama plant and mass production from FY2027. It set a target of 1 trillion yen in net sales and 300 billion yen in operating profit by FY2030, driven by AI server substrate demand. Yet the stock dropped sharply, about 13 percent, when the earnings forecast fell short of market expectations despite strong profit growth.