IndustryAtlasSUPPLY CHAIN HANDBOOK
Distinguish memory chips, controllers, modules and finished storage products, then examine HBM and advanced integration. Similar product names do not imply the same supply-chain role; capacity, bandwidth and packaging describe different requirements.
They occupy different system roles. DRAM supplies working memory; HBM is a stacked DRAM architecture emphasizing bandwidth and close integration. NAND combines with controllers, firmware and packaging to create persistent storage. Capacity measures how much data fits, while bandwidth measures data movement. The chain also separates chip manufacturing, packaging and testing, controllers and finished modules, clarifying what each company actually delivers.
Module manufacturers combine chips, boards and supporting devices, then test the product. Chip fabrication, module design and sales are distinct capabilities; a module brand does not identify a wafer manufacturer.
NAND supplies the medium. Controllers and firmware manage access and devices, while packaging and interfaces create usable products. A controller vendor may also supply a broader solution.
HBM base-die and stack integration support high-bandwidth exchange. NAND-based extension or caching places suitable data in another tier, adding capacity options without providing equivalent bandwidth.
Ask how quickly data must be accessed and whether it must survive power loss before comparing capacity and cost. Fast working memory and larger persistent storage cooperate while performing different tasks.
DRAM is working memory; HBM is a high-bandwidth DRAM architecture. NAND and NOR retain data without power. Distinguish chip vendors, foundries, assembly and test, controllers, and finished products.
Explore this role on the mapSuggest a correctionBack to contents
Manufacture customer memory designs using compatible processes. PSMC is a Taiwanese example.
Foundry service is an input purchased by fabless vendors, although design precedes fabrication in the workflow. Process capability, capacity and yield constrain products.
Distinction: This does not identify the foundry for every ESMT or Etron product.
Scope of these company examples
DRAM processes and foundry services; customers and products require specific evidence.
Product / role sourceExplore this role on the mapSuggest a correctionBack to contents
ESMT and Etron supply their own memory IC products using manufacturing partners.
Fabless vendors and IDMs can both sell memory chips and compete where specifications overlap. ESMT offers DRAM, NOR, NAND and known-good dies; Etron offers specialty DRAM and related products.
Distinction: Fabless memory products differ from design-service fees, IP licensing and NAND controller products.
Scope of these company examples
DRAM, NOR, NAND, KGD and multichip products.
Product / role sourceSpecialty DRAM products using a different production model from an IDM.
Product / role sourceExplore this role on the mapSuggest a correctionBack to contents
Provide working data capacity for computers, phones, networking and other devices, requiring power and refresh.
IDMs such as Nanya and Winbond design and manufacture chips; ESMT and Etron use a fabless model. DDR, LPDDR and GDDR serve different interfaces and applications; vendor coverage varies.
Distinction: A DRAM chip is not a DIMM; capacity growth does not automatically scale bandwidth.
Scope of these company examples
Develops, designs, manufactures and sells DRAM.
Product / role sourceSpecialty and mobile DRAM; compare individual products.
Product / role sourceDRAM, low-power memory and known-good dies.
Product / role sourceSpecialty DRAM for electronic equipment.
Product / role sourceDDR and related DRAM components.
Product / role sourceDDR, LPDDR and GDDR product families.
Product / role sourceDRAM and HBM products and processes.
Product / role sourceExplore this role on the mapSuggest a correctionBack to contents
PTI and ChipMOS offer memory-related assembly and test services.
Testing spans wafer and packaged-device stages and must match capacity, interface and reliability requirements. Service providers are distinct from the owners of the memory chip design and brand.
Distinction: Conventional DRAM or flash test capability does not establish volume HBM stacking contracts.
Scope of these company examples
DRAM, NAND, NOR and MCP final test and related services.
Product / role sourceMemory wafer test, assembly and back-end testing.
Product / role sourceExplore this role on the mapSuggest a correctionBack to contents
ADATA and Transcend integrate DRAM chips, boards and supporting components into tested memory modules.
Modules require signal, compatibility and reliability validation. IDMs can also sell modules, so the business categories overlap.
Distinction: A DDR5 DIMM does not require a NAND SSD controller; Phison is not a necessary upstream vendor for all memory products.
Scope of these company examples
Memory modules, a distinct role from DRAM die fabrication.
Product / role sourceDesign, manufacture, test and sale of memory modules.
Product / role sourceExplore this role on the mapSuggest a correctionBack to contents
NAND dies combine with controllers, firmware and packaging in SSDs, mobile storage and memory cards.
Representative suppliers include Samsung, SK hynix, Micron, KIOXIA and SanDisk. 3D NAND builds layers of cells within a die; HBM stacks separate DRAM dies.
Distinction: Having a NAND product line does not establish Macronix or Winbond as suppliers of high-capacity 3D NAND in mainstream ADATA or Transcend SSDs.
Scope of these company examples
A representative NAND supplier; no universal module-brand supply relationship is inferred.
Product / role sourceA representative NAND supplier; no universal module-brand supply relationship is inferred.
Product / role sourceA representative NAND supplier; no universal module-brand supply relationship is inferred.
Product / role sourceA representative NAND supplier; no universal module-brand supply relationship is inferred.
Product / role sourceA representative NAND supplier; no universal module-brand supply relationship is inferred.
Product / role sourceExplore this role on the mapSuggest a correctionBack to contents
NOR often holds code and boot data; SLC and serial NAND address different capacity, interface and reliability needs.
Winbond, Macronix and ESMT offer products in this segment; Macronix also offers ROM. Compatibility, retention, endurance, temperature range and longevity matter.
Distinction: NOR, NAND and ROM are different products; this branch is not synonymous with the high-capacity SSD NAND market.
Scope of these company examples
NOR and SLC NAND code-storage products.
Product / role sourceNOR, SLC/serial NAND and ROM are distinct product families.
Product / role sourceNOR, NAND and multichip memory products.
Product / role sourceExplore this role on the mapSuggest a correctionBack to contents
Phison and Silicon Motion design controllers and firmware to manage NAND, with varying levels of turnkey integration.
Tasks include data placement, error correction, bad-block and wear management, host protocols and performance tuning. Controllers must qualify NAND generations and customer workloads.
Distinction: The controller is a logic chip, not the NAND storage die or HBM DRAM.
Scope of these company examples
Controllers, firmware and solutions for SSD, eMMC, UFS and other storage.
Product / role sourceSSD and eMMC/UFS controllers and turnkey solutions.
Product / role sourceExplore this role on the mapSuggest a correctionBack to contents
Integrate NAND, controllers, firmware and supporting components into SSDs, eMMC, UFS or memory cards; vendor portfolios differ.
ADATA and Transcend supply finished storage, while Phison also supplies integrated solutions. The official LEGEND 970 specification identifies Phison E26 and 3D NAND.
Distinction: One SSD model using Phison does not establish use across every model. Some SSDs have dedicated DRAM; others are DRAMless.
Scope of these company examples
LEGEND 970 specifications identify the Phison E26 controller.
Product / role sourceSSDs, memory cards, USB drives and industrial storage.
Product / role sourceProvides full storage solutions in addition to controllers.
Product / role sourceExplore this role on the mapSuggest a correctionBack to contents
The base die provides interface and related logic beneath an HBM stack; some HBM4 designs use advanced logic processes.
SK hynix announced TSMC advanced logic processes for HBM4 base dies and cooperation on CoWoS integration.
Distinction: TSMC base-die foundry and packaging roles do not make it an HBM DRAM vendor, nor do they apply to every supplier.
Scope of these company examples
Advanced logic cooperation announced by SK hynix; not an HBM DRAM manufacturer.
Product / role sourceExplore this role on the mapSuggest a correctionBack to contents
On March 16, 2026, PSMC announced HBM/PWF foundry and memory-process cooperation with Micron at its Hsinchu facilities.
This is named manufacturing cooperation. The announcement does not enumerate every process step, so its HBM/PWF wording is retained without claiming PSMC makes the entire HBM product.
Distinction: The announcement does not establish every generation, qualification, production date or revenue contribution.
Scope of these company examples
March 16, 2026 Hsinchu cooperation with Micron; individual process scope is not fully disclosed.
Product / role sourceExplore this role on the mapSuggest a correctionBack to contents
PSMC 3D AI Foundry integrates DRAM and logic through wafer stacking to shorten data paths.
The official COMPUTEX 2026 showcase lists AP Memory and ESMT among partners contributing processes, stacking IP or memory designs. Partnership does not establish volume shipments for every product.
Distinction: WoW is an integration route, not automatically standard HBM or a replacement for all HBM.
Scope of these company examples
A platform for wafer stacking of DRAM and logic.
Product / role sourceAP Memory is listed in the 2026 PSMC WoW IP and memory-design showcase.
Product / role sourceESMT appears in the 2026 partner showcase; this does not identify every product foundry.
Product / role sourceExplore this role on the mapSuggest a correctionBack to contents
Phison aiDAPTIV combines NAND cache, controllers, firmware and middleware to retain eligible AI state beyond limited fast-memory capacity.
Eligible state can include KV cache, less-used MoE experts, model data or training state. Results depend on models, access patterns and runtime support.
Distinction: aiDAPTIV does not turn NAND into HBM or give flash GPU-memory speed.
Scope of these company examples
NAND provides a larger lower-tier cache that complements fast memory.
Product / role sourceExplore this role on the mapSuggest a correctionBack to contents