IBIDEN
Supplies IC package substrates for AI servers and networking. Its new Ono Plant began sequential mass production of advanced substrates from October 2025.
Facts
Source per value- Supply-chain roleEditorial grouping of the documented product or process; groups are not interchangeable suppliers.
- Substrates & materials 1
- Reference product / platformA named product, platform or material checked in the linked source; not an exhaustive catalogue.
- Advanced IC package substrates 1
- Process / serviceThe manufacturing, packaging or test step explicitly described by the source.
- Automated package-substrate production at Ono Plant 1
- Published capabilityA product-specific capability or specification. Test speeds, defect sizes and memory bandwidth are different measures.
- Ono Plant: sequential mass-production start scheduled from October 2025, primarily for AI server substrates 1
- HBM generations / scopeOnly generations explicitly documented in the cited source. Application or roadmap scope is labelled.
- Not published
- Reference stack capacity GBCapacity of the named reference memory stack, not monthly output or a supplier maximum.
- Not published
- Reference stack layers layersDRAM die count in the named reference stack. Future roadmap heights are excluded.
- Not published
- Named platform / customerOnly an explicitly disclosed platform relationship; designed-for statements are labelled.
- Not published
- Supply-capacity disclosureDated public production-capacity disclosure or plan. Not available allocation, inventory or a lead-time estimate.
- October 2025 opening notice: Ono Plant completed January 2025; sequential mass production scheduled from October 2025; HBM-specific output undisclosed 1
- Market share (scope and period)Published research or filing estimate with its market, metric and period. Rounded shares need not sum to 100%; not a current allocation measure.
- Not published
- HBM base-die logicDisclosed base-die foundry or process for a named generation. Collaboration announcements retain their status and date.
- Not published
- Named ecosystem partnersDisclosed development or manufacturing partners; a partnership is not a customer supply contract.
- Not published
Sources
- IBIDEN: Ono Plant opening and production scope, Oct 2025 accessed 2026-11-11
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