When people say the United States 'controls chipmaking tools to China,' the precise content of that claim lives in two ECCNs: 3B001 and 3B002. The October 2023 BIS interim final rule on semiconductor manufacturing items is where those entries took their current shape. It did something structurally important that is easy to miss in summary coverage: it removed the standalone tool entry 3B090 and folded all of that equipment, plus additional tool types, into the long-standing 3B001 and 3B002 entries, then made conforming changes to the related software and technology ECCNs 3D001, 3D002, 3D003, and 3E001. Understanding why that move matters requires reading the entries, not the press release.
From 3B090 to 3B001/3B002
The original October 2022 controls created ECCN 3B090 as a new home for specified semiconductor manufacturing equipment (SME) essential to producing advanced-node integrated circuits. The 2023 SME rule retired 3B090 and migrated those items into 3B001 and 3B002, the established equipment entries, while adding further tool types. This is not mere housekeeping. 3B001 and 3B002 carry their own well-developed sub-paragraph structure, license-exception treatment, and country-chart reasons for control, so moving the advanced-node SME into them integrates that equipment into the normal architecture of the Commerce Control List rather than leaving it as a bespoke island. The rule also revised the license-exception restrictions to reflect 3B090's removal and made corresponding edits so that the software (3D) and technology (3E) entries that enable, develop, or produce these tools carry parallel controls.
The deposition parameters that define the line
The technical heart of these SME entries is not generic 'etch and deposition tools.' It is specific process-physics thresholds. The rule controls, for example, certain chemical-vapor-deposition equipment designed to deposit a film containing silicon and carbon with a dielectric constant (k) of less than 5.3, into lateral openings of less than 70 nanometers, at aspect ratios greater than 5:1 (depth to width), with a feature-to-feature pitch of less than 100 nanometers. Those four parameters together describe a low-k gap-fill capability that is genuinely a leading-edge interconnect process step, not a legacy one. By writing the control around k less than 5.3, sub-70-nanometer openings, greater-than-5:1 aspect ratios, and sub-100-nanometer pitch, BIS targets the equipment that enables advanced back-end-of-line structures while leaving more relaxed-geometry deposition tools outside the entry. This is the same parameter-first philosophy seen in the 3A090 logic controls: the rule reaches a capability, defined numerically, rather than a brand or a category.
The 'advanced-node IC' definition that everything hinges on
The SME controls are anchored to the defined term 'advanced-node integrated circuits,' and that definition is itself a parameter set. An advanced-node IC is one meeting any of three tests: a logic IC produced at a technology node of 16/14 nanometers or less; a NOT-AND (NAND) memory IC with 128 layers or more; or a dynamic random-access memory (DRAM) IC produced at an 18-nanometer half-pitch or less. Each branch was chosen to separate genuinely advanced production from the kind of mature output widely available on the open market. The 128-layer NAND figure in particular was set high enough to distinguish advanced 3D NAND from commodity memory. Because the SME controls bite on equipment 'essential to producing' advanced-node ICs as defined, this three-pronged definition is load-bearing: change the node, layer, or half-pitch numbers and the entire scope of which tools are controlled moves with them.
Why the AT-only entries stayed in
The 2023 rule also resolved a fight over scope. Commenters asked BIS to remove ECCNs 3B991 and 3B992, which are controlled only for anti-terrorism reasons, from the supercomputer and advanced-node end-use controls, arguing those entries cover legacy manufacturing and general-utility tools that did not require a license to China before October 2022. BIS declined, stating it was not aware of items in 3B991 that are unrelated to semiconductor device manufacturing. The refusal is significant because it keeps a broad band of equipment inside the end-use control net even where the underlying ECCN is otherwise lightly controlled, on the theory that the end use, building advanced-node capacity, is the concern rather than the tool's default classification. For anyone mapping which tools are reachable, the lesson is that 3B991 and 3B992 cannot be assumed safe simply because they carry only AT-level reasons for control; the end-use rules in part 744 can still capture them.
Parts, components, and the long reach of the entry
The 3B001 and 3B002 entries do not stop at whole machines. The controlled scope, as cross-referenced in later rules, sweeps in 'equipment' along with 'specially designed' 'parts,' 'components,' and 'accessories' described in the same entries, with carve-outs for specific sub-paragraphs. That matters because a leading-edge deposition or etch tool is a system of subsystems, and controlling only the assembled tool would leave the critical subassemblies free to flow. By naming specially designed parts and components, the entries reach the chambers, sources, and modules that give a tool its advanced capability, which is where much of the genuine know-how and bottleneck value sits. A compliance read of these ECCNs therefore has to go sub-paragraph by sub-paragraph, because the exceptions are as load-bearing as the inclusions; the entries explicitly except specific items such as portions of 3B001.a.4, c, d, and others, so two superficially similar parts can land on opposite sides of the line.
The conforming changes to the software and technology entries complete the picture. By revising 3D001, 3D002, 3D003, and 3E001 alongside the equipment move, BIS ensured that the software that operates these tools and the technology required to develop, produce, or use them carry license requirements parallel to the hardware. This is the same three-layer pattern that governs the advanced-computing logic controls: commodity, software, technology, each controlled in step so that an exporter cannot ship the know-how to build or run a controlled tool even where the physical tool is unavailable. The 2023 SME rule's lasting contribution is structural. By dissolving the bespoke 3B090 entry into the mainline 3B001 and 3B002 framework and tying everything to the three-pronged advanced-node IC definition, it turned a hurried 2022 control into a durable, parameter-anchored piece of the Commerce Control List that later rules could build on without re-litigating the basics.