GUC Announces 3nm 12 Gbps HBM4 PHY and Controller

Hsinchu, Taiwan – Apr 22, 2026 – Global Unichip Corp. (GUC), the advanced ASIC leader, today announced the successful demonstration of a 12 Gbps HBM4 IP platform implemented on TSMC’s 3nm process technology at the Partner Pavilion of the TSMC 2026 North America Technology Symposium. The platform features GUC’s in-house full functional HBM4 Controller and PHY IP, integrated with a partner’s HBM4 memory, and used TSMC’s industry-leading CoWoS® advanced packaging technology.

GUC’s previous-generation HBM3E PHY and Controller, deployed in customers’ 3nm products, have achieved speeds 15% above specification in production. JEDEC continues to drive an aggressive HBM roadmap, increasing memory throughput and capacity while further doubling the data bus width in HBM4. Comparing with HBM3E, GUC’s HBM4 IP delivers 2.5x bandwidth, while improving power efficiency by 1.5x and area efficiency by 2x.

In line with GUC’s previous HBM, GLink, and UCIe IP solutions, the HBM4 IP integrates proteanTecs’ interconnect monitoring solution to provide high visibility for PHY testing and characterizing, while enhancing in-field performance and reliability for end products.

To address the growing demand for 3DIC architectures, GUC’s HBM4 PHY also supports a face-up configuration, enabling integration with TSMC’s SoIC face-to-face technology. The PHY macro integrates TSVs for PHY’s I/O signals, power, and ground connections, and also reserves TSVs for power feedthrough to the top die, supporting the power distribution requirements of the upper logic die.

“We are proud to be the first company to demonstrate a 12 Gbps HBM4 IP to customers at the TSMC Symposium” said Igor Elkanovich, CTO of GUC. “Together with GUC’s UCIe and GLink-3D IPs, we offer a complete 2.5D/3D IP solution for modern 3.5D system architectures, including TSMC SoIC-X on CoWoS.”

12 Gbps Eye Diagram:

GUC HBM4 IP Highlights

• Ready on TSMC N3P, timing signoff at 12 Gbps
• Next generation HBM4E to be ready in Q2’26, targeting 16 Gbps
• Support all TSMC CoWoS technology – CoWoS-S/R/L
• Support face-up configuration for 3D SoIC architecture
• Advanced Interposer Routing to support angle routing with a Y-dimension offset
• Built-in proteanTecs chiplet interconnect monitoring solution

Explore HBM4 IP:

• TSMC CLN3FFP HBM4 PHY

About GUC

Global Unichip Corp. (GUC) is the Advanced ASIC Leader who provides the semiconductor industry with leading IC implementation and SoC manufacturing services, using advanced process and packaging technology. Based in Hsin-Chu, Taiwan, GUC has developed a global reputation with a presence in China, Europe, Japan, Korea, North America, and Vietnam. GUC is publicly traded on the Taiwan Stock Exchange under the symbol 3443. For more information, please visit our website: www.guc-asic.com