Micron Technology
Micron Technology, Inc. is an American semiconductor company headquartered in Boise, Idaho. It produces dynamic random access memory, flash memory and storage devices, and is one of only three companies in the world that manufacture leading-edge DRAM at scale, the others being Samsung Electronics and SK Hynix. It is the only one headquartered outside East Asia.
| Micron Technology, Inc. | |
|---|---|
| Type | Public |
| Traded as | Nasdaq: MU; S&P 500 component |
| Industry | Semiconductors |
| Founded | 5 October 1978, Boise, Idaho |
| Founder | Ward Parkinson, Joe Parkinson, Dennis Wilson, Doug Pitman |
| Headquarters | Boise, Idaho, United States |
| Area served | Worldwide |
| Key people | Sanjay Mehrotra (chairman, president and chief executive), Mark Murphy (chief financial officer) |
| Products | DRAM, NAND flash memory, NOR flash, high bandwidth memory, solid state drives, multichip packages |
| Revenue | Approximately US$25 billion (fiscal 2024) |
| Employees | Approximately 48,000 |
| Website | micron.com |
Memory is a commodity in the economic sense: the products of the three manufacturers are functionally interchangeable, are sold against published specifications, and are priced by supply and demand rather than by differentiation. The industry is consequently among the most cyclical in existence, with prices and margins swinging by very large multiples within a few years, and Micron's results move accordingly: it has reported both losses of several billion dollars and profits of similar magnitude within the same decade.
Since 2023 the growth of artificial intelligence has changed the industry's character. High bandwidth memory, in which DRAM dies are stacked vertically and connected to a processor through a silicon interposer, is required by every accelerator used to train and run large models, and demand for it has exceeded supply since its introduction, producing margins the memory industry has not previously seen.
History
Founding and survival, 1978 to 1996
Micron was founded on 5 October 1978 by the twin brothers Ward and Joe Parkinson, Dennis Wilson and Doug Pitman as a semiconductor design consultancy, operating from the basement of a dental surgery in Boise. Its initial funding came from local businessmen including Tom Nicholson, Allen Noble, Rudolph Nelson and Ron Yanke, and, decisively, from J. R. Simplot, the potato magnate who supplied McDonald's with french fries and who invested several million dollars at a point when the company had none.
It began manufacturing its own 64K DRAM in 1981. The decision to build a fabrication plant in Idaho, far from any existing semiconductor cluster, was made because land, power and labour were cheap, and Micron's cost discipline, which became its defining characteristic, dates from that period.
The 1980s nearly destroyed the American memory industry. Japanese manufacturers, supported by a coordinated national research programme and by patient capital, produced DRAM of higher quality at lower cost, and within a few years almost every American producer withdrew, including Intel, which exited in 1985, Texas Instruments, Mostek, National Semiconductor and AMD. Micron survived, principally by being smaller, cheaper and more willing to run its plants continuously through downturns, and by filing anti-dumping petitions that produced the 1986 semiconductor trade agreement between the United States and Japan.
Steve Appleton, who had joined in 1983 as an hourly production worker, became chief executive in 1994 at the age of 34 and led the company for eighteen years until his death in a light aircraft accident in 2012.
Consolidation, 1998 to 2016
The memory industry consolidated from more than twenty manufacturers to three, and Micron was among the consolidators.
It acquired the memory operations of Texas Instruments in 1998, which brought plants in Italy, Singapore and Texas; Toshiba's Dominion Semiconductor in Virginia in 2001; the flash memory card business Lexar in 2006; and Numonyx, the NOR flash venture of Intel and STMicroelectronics, in 2010.
Its most significant acquisition was Elpida Memory of Japan, the last independent Japanese DRAM manufacturer, which entered bankruptcy in 2012 with debts of approximately ¥448 billion and which Micron acquired in 2013 for approximately US$2.5 billion. The purchase brought the Hiroshima fabrication plant, which is among the company's most advanced, a substantial Japanese engineering organisation, and a controlling interest in the Taiwanese producer Rexchip, subsequently Micron Memory Taiwan. Micron also acquired full ownership of Inotera Memories in Taiwan in 2016 for approximately US$4 billion.
The result was a three-company industry. Samsung Electronics holds roughly 40 to 45 per cent of DRAM, SK Hynix roughly 30 per cent and Micron roughly 20 to 25 per cent, and the concentration has made the cycle considerably less violent than it was when twenty companies competed, since three producers can restrain investment in a downturn in a way twenty could not.
Mehrotra and the artificial intelligence cycle, 2017 to 2026
Sanjay Mehrotra, a co-founder of SanDisk who had led that company until its sale to Western Digital, became chief executive in May 2017.
His tenure has been shaped by four things. The first is the exit from partnerships: Micron ended the IM Flash Technologies joint venture with Intel in 2018 and 2019 and, with it, the 3D XPoint technology the two had developed, which Micron discontinued in 2021 and whose Lehi, Utah, plant it sold to Texas Instruments.
The second is trade policy. The United States restricted exports of advanced semiconductor equipment to China from 2022, and the Cyberspace Administration of China responded in May 2023 by prohibiting operators of critical information infrastructure from purchasing Micron products, a decision widely understood as retaliation. Micron estimated the effect at approximately half its China revenue, and the episode demonstrated the exposure of an American memory manufacturer in a market that consumes a very large proportion of the world's output.
The third is industrial policy. The CHIPS and Science Act of 2022 produced approximately US$6.1 billion in grants for Micron, supporting a very large fabrication complex at Clay, near Syracuse in New York, announced at up to US$100 billion over two decades and intended to be the largest semiconductor site in the United States, together with expansion in Boise and in Manassas, Virginia. The New York project is among the largest private investments ever announced in that state and has proceeded more slowly than announced, as such projects generally do.
The fourth is high bandwidth memory. Micron entered the category later than SK Hynix, which had supplied Nvidia first and which held the leading position, and its HBM3E product qualified for Nvidia's accelerators in 2024. The business grew from nothing to a very large proportion of the company's revenue within two years, is sold out well in advance, and has produced the strongest results in the company's history.
Products
DRAM
Dynamic random access memory stores each bit as charge in a capacitor, which leaks and must be refreshed thousands of times a second, hence dynamic. It is the working memory of essentially every computer, telephone, server and vehicle, and its density has improved through successive process nodes, now designated by numbers such as 1-alpha, 1-beta and 1-gamma rather than by dimension, since the features concerned no longer correspond to the nanometre figures once used.
Micron's DRAM is sold as modules for personal computers and servers, as low-power variants for mobile devices, as graphics memory, as automotive-qualified parts requiring far longer lifetimes and wider temperature ranges, and as high bandwidth memory for accelerators.
High bandwidth memory is the most demanding product the industry makes. Eight, twelve or sixteen DRAM dies are thinned, stacked and connected vertically by through-silicon vias, then placed beside a processor on an interposer, producing bandwidth an order of magnitude greater than conventional memory. Yields are lower, the process is longer, and the capacity consumed per gigabyte sold is several times that of standard DRAM, which is why the growth of the category has tightened supply across the whole market.
NAND flash
NAND flash stores data without power and is the basis of solid state drives, memory cards and the storage in telephones. Micron produces it in three-dimensional form, stacking layers vertically, with successive generations exceeding 200 and then 300 layers.
The NAND market is less concentrated than DRAM, with Samsung, SK Hynix through its acquisition of Intel's business, Kioxia, formerly Toshiba Memory, Western Digital and Micron competing, and its economics have consequently been worse, with prolonged periods of losses across the industry.
Crucial, Micron's consumer brand, sells memory modules and solid state drives directly to consumers and system builders and is among the few instances of a semiconductor manufacturer selling under its own name at retail.
The memory cycle
The economics of memory are unlike those of most semiconductors and account for the industry's reputation.
Capacity takes approximately two years and several billion dollars to add and cannot be added in small increments. Demand varies with the personal computer, smartphone, server and automotive markets simultaneously. And the product is undifferentiated, so that when supply exceeds demand the price falls to marginal cost and below, and when demand exceeds supply the price rises without limit until capacity arrives.
The consequence is a cycle in which prices may fall by two thirds over eighteen months and then triple over the following year, and in which the industry's aggregate profitability over a full cycle has historically been close to zero. The consolidation to three DRAM producers has moderated this: the three have generally restrained investment in downturns rather than competing for share, and the 2023 downturn, in which all three cut production, was resolved more quickly than earlier ones.
Micron's position within the cycle is structurally weaker than its competitors', because it is the smallest of the three, because it has no other businesses to offset the losses, whereas Samsung has logic, displays and consumer electronics and SK Hynix has the support of a larger group, and because its cost of capital is higher. Its management has accordingly emphasised cost per bit and technology transitions rather than volume.
Manufacturing and technology
Micron operates fabrication plants in Boise, which includes its research fab and, from 2025, new volume capacity; Manassas, Virginia, which produces long-lifecycle products for automotive and industrial customers; Hiroshima, Japan, inherited from Elpida and among its most advanced; Taichung in Taiwan; and Singapore, which produces NAND. Assembly and test operations are in Singapore, Malaysia, Taiwan, Japan, China and India, where a facility at Sanand in Gujarat was announced in 2023 as that country's first large semiconductor packaging investment.
Its technology development is conducted principally in Boise, and its process transitions have in recent generations been competitive with and in some measures ahead of its competitors', a change from the 2000s when it lagged. It adopted extreme ultraviolet lithography later than Samsung and SK Hynix, using multiple patterning at nodes where they used EUV, and has since introduced it.
Legal and trade matters
Fujian Jinhua and UMC
In 2017 Micron discovered that former employees at its Taiwanese subsidiary had taken DRAM process technology to United Microelectronics Corporation, which was working with Fujian Jinhua Integrated Circuit, a Chinese state-backed manufacturer, to develop DRAM. The United States indicted UMC and Jinhua in 2018, placed Jinhua on the entity list restricting its access to American equipment, which halted its development, and UMC pleaded guilty in 2020 and paid a US$60 million fine. Jinhua was convicted in 2024 and fined.
The case is the most prominent instance of prosecution for semiconductor technology theft and was a significant element in the deterioration of American and Chinese technology relations.
Antitrust
The memory industry has been the subject of repeated price-fixing proceedings. Micron was granted leniency in the American DRAM cartel investigation of the 2000s in exchange for cooperation, which produced guilty pleas and prison sentences for executives of Samsung, Hynix and Infineon, and the company has been a defendant in civil actions arising from the same conduct. Chinese authorities opened an investigation into the three DRAM manufacturers in 2018 which has not produced a public conclusion.
China
The May 2023 prohibition on Micron products in Chinese critical information infrastructure was imposed after a cybersecurity review whose findings were not published. Micron has continued to sell in China for other applications and has invested in its Xi'an packaging operation, and the episode is generally read as the first significant Chinese retaliation against American semiconductor restrictions.
Assessment
Micron is the survivor of an industry that destroyed almost every American participant, and its survival was achieved by being cheaper rather than better for the first two decades of its existence.
Its current position is the strongest it has held. It is one of three suppliers of a product every computer requires, in a market whose concentration has made the cycle less destructive; it has qualified for the high bandwidth memory used by artificial intelligence accelerators, a category growing faster than any in the industry's history; it is the beneficiary of American industrial policy directed at reducing dependence on East Asian manufacture; and its technology is competitive rather than trailing.
Its risks are equally clear. It remains the smallest of three producers in a commodity business; a very large proportion of its recent revenue depends on demand for artificial intelligence accelerators, which is itself concentrated in a small number of customers and which may prove cyclical; its exposure to China is substantial and politically determined; and the capital required to remain in leading-edge memory manufacture, tens of billions of dollars a cycle, is a permanent obligation that does not vary with whether the market is good.