Layer L3
HBM & Packaging
The memory-bandwidth and advanced-packaging bottleneck of every training cluster.
HBM & DRAM, CXL, CoWoS / SoIC, glass substrates
HBM / DRAM & memory componentsCXLadvanced packaging (CoWoS · SoIC · glass substrate)
Topics in this layer
HBM Memory
The bandwidth bottleneck that decides every training-cluster TCO.
Advanced Packaging (CoWoS & SoIC)
CoWoS, SoIC, and the 2.5D/3D packaging bottleneck that gates every HBM-equipped AI accelerator.
CXL Memory Fabric
Compute Express Link: memory pooling, expansion, and the disaggregation bet for AI inference.
Companies (13)
Ranked leaderboard →Ranked suppliers for HBM & Packaging
Companies grouped by what they build, with the latest verified signal per company.
View the L3 leaderboard →Engineering reference, not investment advice.