SK Hynix Leads AI Memory Innovation with First 12-Layer HBM4

Seoul, South Korea / San Jose, CA—SK Hynix Inc. has shipped samples of 12-layer HBM4, a new ultra-high-performance DRAM for AI, to major customers. 

This marks the first worldwide delivery of this memory product. 

The samples were delivered on schedule, drawing on SK Hynix's technological edge and production experience in the HBM market.

The company has initiated the certification process with customers and plans to begin mass production of 12-layer HBM4 products in the second half of 2025. 

This move will strengthen SK Hynix's next-generation AI memory market position.

The 12-layer HBM4 samples feature industry-leading capacity and speed characteristics essential for AI memory applications. 

The product has implemented bandwidth capable of processing more than 2TB of data per second, a first in the industry. 

This performance equates to processing data equivalent to more than 400 full-HD movies (5GB each) in a single second, representing a speed increase of more than 60 percent compared to the previous generation HBM3E.

SK Hynix has employed the Advanced MR-MUF process to achieve a capacity of 36GB, the highest among 12-layer HBM products. 

This process, which has proven effective through the successful production of previous-generation memory, helps prevent chip warpage while maximizing product stability through improved heat dissipation.

The company has established itself as a leader in the AI memory market. In 2022, it was the first provider to mass-produce HBM3, followed by 8-layer and 12-layer HBM3E in 2024. 

SK Hynix has consistently developed and supplied HBM products to meet market demands on time.

Justin Kim, President and Head of AI Infra at SK Hynix, stated that the company has enhanced its position as a front-runner in the AI ecosystem through years of consistent efforts to overcome technological challenges under customer demands. 

He noted that SK Hynix is prepared to proceed smoothly with performance certification and preparatory work for mass production, leveraging its experience as the industry's largest HBM provider.