[Report] Inside SK hynix's First HBM Plant in the U.S.... Mass Production Begins in 2029

7% Complete Overall, 15% in Construction
Mass Production Targeted for Second Half of 2029
Pioneering U.S. HBM Supply Chain Hub

At 5:43 p.m. local time on the 26th, at the SK hynix semiconductor plant construction site in West Lafayette, Indiana, four tower cranes soared into the sky as soon as you entered the site. In the center of the construction area, a concrete structure had already risen several tens of meters high, while steel beams and scaffolding stretched out behind it. The ground was densely packed with rebar, building materials, and heavy equipment.

Until just last year, this place was filled with corn fields. Kim Hyunjoong, Head of the Indiana Fab Project Construction Team at SK hynix, explained, "This used to be a cornfield," and added, "We began by removing the corn and stripping the topsoil." Construction officially began on April 15. The overall project is currently about 7% complete, with the building construction process at roughly 15% completion.

Kim Hyunjung, Head of the SK hynix Indiana Fab Project Construction Team, and employees are touring the SK hynix Advanced Packaging production site in West Lafayette, Indiana, USA. Indiana (USA) = Photo by Yoonjoo Hwang

What is going up on this former cornfield is far more than just another production facility. The entire site covers approximately 538,000 square meters (133.5 acres), which is slightly larger than Seoul Forest. Within this space, there will be an HBM Advanced Packaging production facility, research and development (R&D) center, office space, central utility building, gas plant, water treatment facility, warehouse, and a wastewater processing plant. This is a major semiconductor production base being built by SK hynix in the United States to connect HBM production, R&D, and the supply chain locally.

According to site briefing materials, the total gross floor area of the fab is about 79,300 square meters (854,000 square feet). Of this, the cleanroom—where the actual semiconductor production process occurs—takes up 16,860 square meters (181,500 square feet). The building is about 30.5 meters (100 feet) tall, equivalent to a 10-story commercial building.

Semiconductor plants require far more demanding foundation work than ordinary buildings. This is because equipment worth billions of won will be installed on-site, and even minor vibrations or load shifts can affect product yields. Kim emphasized, "In Korea, there is a lot of bedrock, but here, there is almost none," and added, "We're driving many large and deep piles into the ground to support the heavy equipment securely."

The actual scale of materials being used demonstrates this. According to the site report, if the rebar used for construction were lined up end to end, it would stretch about 4,241 kilometers (2,635 miles)—roughly the distance from New York to Los Angeles. The amount of steel used totals about 21,900 tons (24,157 short tons), which is about the weight of 220 of Chicago's iconic 'Cloud Gate' sculptures. Approximately 135 kilometers (84 miles) of piping and 1,505 kilometers (935 miles) of electrical cables will also be installed.

The daily water treatment capacity is about 14.38 million liters (3.8 million gallons), enough to fill six Olympic-sized swimming pools. This explains why both a water purification facility and a wastewater treatment plant are included on the site, alongside the production facility.

First HBM production base in the United States...Mass production planned for the second half of 2029 

SK hynix fab construction site in West Lafayette, Indiana. Indiana, USA – Special Correspondent Yoonjoo Hwang.

SK hynix is developing the Indiana fab as its first HBM production hub in the United States and as a flagship semiconductor manufacturing facility. After completion, SK hynix plans to bring advanced HBM wafers produced in Korea to Indiana, where they will undergo advanced packaging and testing before being supplied to U.S.-based customers. Rather than relocating the entire production process, the company is establishing a link between Korea's memory production foundation and the advanced post-processing and customer ecosystem in the United States.

SK hynix plans to complete the cleanroom in October 2028, with mass production of next-generation HBM chips starting in the second half of 2029. The facility is targeting an annual production capacity of several hundred thousand wafers. About 1,000 employees will work in the fab, handling production, engineering, and R&D functions.

Once the plant is operational, its impact on the local Indiana region is expected to be significant. The company is currently discussing local supply chain establishment with around 100 materials, parts, and equipment partners. Including fab construction and operation as well as related industries, approximately 7,000 direct and indirect jobs are expected to be created.

As construction accelerates, the number of workers on site will increase substantially. During peak periods for equipment and electrical installation, up to about 3,000 people may be working on the site in a single day. This figure is separate from the regular workforce needed to operate the plant after completion and only applies during the construction phase.

Visa and tariff issues also challenging... "Using U.S.-made steel aims to reduce risk factors"

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The process of Korean companies building a large-scale semiconductor plant in the United States involves an entirely different set of variables compared to projects in Korea. Kim explained, "The land, climate, culture, and language are all different, so we're learning something new every day." He noted that it is essential to adapt construction practices to local standards and customs, rather than simply applying the construction methods and workforce management approaches used in Korea.

Tariffs and the supply chain are additional variables. Currently, tariffs are being applied to certain materials, such as steel. Kim stated that, "To minimize the impact of external variables, we are trying to use U.S.-made materials such as rebar whenever possible." In reality, many local American companies are involved in the project, and about 50 companies are expected to take part in the overall construction process.

To manage the large workforce on site, the company is also verifying visas and employment eligibility. The local team explained that there have been no issues regarding visas to date, and that subcontractors are required to confirm the legal employment status of their workers from the contract stage onward.

The location’s proximity to residential areas is also carefully considered. During the plant site planning phase, facilities with potentially high noise levels were placed as far away from residential zones as possible, and temporary noise barrier walls have been installed at the construction site. Eight locations around the property are used to measure fine dust, ultrafine dust, noise, and light levels in real time, with this data being released to local residents.

In a little over two years, what was once an expansive cornfield will be transformed into a state-of-the-art semiconductor facility. More than just a production plant, this site is set to become the hub where HBM—one of the core strategic components of the AI era—is manufactured in the United States. It represents a new axis in the Korea-U.S. semiconductor supply chain, linking Korean memory technologies with American AI demand and R&D ecosystems. 

This content was produced with the assistance of AI translation services.