Intel is making a bold move back into the memory market, a sector it abandoned in 1985, by collaborating with SoftBank’s Saimemory subsidiary to introduce Z-Angle Memory (ZAM). This new technology aims to address the escalating demand for DRAM, particularly in AI infrastructure, where supply shortages and limited competitors have created a critical bottleneck.
The partnership marks Intel’s first major foray into memory development in nearly four decades, leveraging a novel approach to DRAM stacking. Unlike traditional vertical memory architectures, ZAM employs a diagonal interconnect topology—routing connections at an angle within the die stack rather than drilling straight down. This design not only maximizes silicon area usage but also reduces thermal resistance, enabling higher densities and improved power efficiency.
At its core, ZAM is built on copper-to-copper hybrid bonding, which fuses memory layers into a near-monolithic structure, eliminating the need for separate stacks. This method, combined with a capacitor-less design, allows Intel to integrate memory directly with AI chips using its Embedded Multi-die Interconnect Bridge (EMIB) technology. The result is a memory solution that could offer up to 512 GB per chip while consuming 40-50% less power than existing alternatives like High Bandwidth Memory (HBM).
Why This Matters for AI and Beyond
The re-entry into memory isn’t just about filling a niche—it’s about redefining how memory is structured to meet the demands of next-generation AI workloads. Current DRAM architectures struggle to keep pace with the performance requirements of large-scale AI training and inference, forcing hyperscalers to rely on expensive, high-power solutions. ZAM’s Z-Angle interconnects simplify manufacturing by reducing the complexity of vertical stacking, potentially lowering costs while increasing scalability.
For SoftBank, the collaboration grants ownership of the memory stack, which could be integrated into its custom ASICs—such as the upcoming Izanagi lineup—providing greater control over system architecture. Meanwhile, Intel stands to benefit from a technology that could attract major AI players, including NVIDIA, to adopt ZAM as a standard for future data centers.
What Comes Next?
The development of ZAM began under Intel’s Advanced Memory Technology (AMT) program, funded by the Department of Energy, where the company demonstrated next-generation DRAM bonding techniques. While exact performance benchmarks against HBM remain unconfirmed, early indications suggest ZAM could deliver orders-of-magnitude improvements in efficiency and density. If successful, this could shift the balance in the memory market, offering a viable alternative to established suppliers like Samsung and SK Hynix.
Intel’s return to memory isn’t without precedent—the company once dominated the DRAM market before Japanese competitors gained dominance in the 1980s. This time, however, the stakes are higher, with AI infrastructure driving demand to unprecedented levels. Whether ZAM can carve out a significant share remains to be seen, but the partnership with SoftBank positions Intel to compete in a space it has long avoided.
