# 15 C.F.R. § 231.107 (2026): Legacy semiconductor

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_107

## Section

- **Citation:** 15 C.F.R. § 231.107 (2026)
- **Heading:** Legacy semiconductor
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Title 15 CFR: Commerce and Foreign Trade / Chapter II: NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, DEPARTMENT OF COMMERCE / Part 231: CLAWBACKS OF CHIPS FUNDING / Subpart A: Definitions / § 231.107: § 231.107   Legacy semiconductor.

## Text

(a)
Legacy semiconductor
means:
(1) For the purposes of a semiconductor wafer facility:
(i) A silicon wafer measuring 8 inches (or 200 millimeters) or smaller in diameter; or
(ii) A compound wafer measuring 6 inches (or 150 millimeters) or smaller in diameter.
(2) For the purposes of a semiconductor fabrication facility:
(i) A digital or analog logic semiconductor that is of the 28-nanometer generation or older (
i.e.,
has a gate length of 28 nanometers or more for a planar transistor);
(ii) A memory semiconductor with a half-pitch greater than 18 nanometers for Dynamic Random Access Memory (DRAM) or less than 128 layers for Not AND (NAND) flash that does not utilize emerging memory technologies, such as transition metal oxides, phase-change memory, perovskites, or ferromagnetics relevant to advanced memory fabrication; or
(iii) A semiconductor identified by the Secretary in a public notice issued under 15 U.S.C. 4652(a)(6)(A)(ii).
(3) For the purposes of a semiconductor packaging facility, a semiconductor that does not utilize advanced three-dimensional (3D) integration packaging, under paragraph (b)(3) of this section.
(b) Notwithstanding paragraph (a) of this section, the following are not legacy semiconductors:
(1) Semiconductors critical to national security, as defined in § 231.118;
(2) A semiconductor with a post-planar transistor architecture (such as fin-shaped field field-effect transistor (FinFET) or gate all around field-effect transistor); and
(3) A semiconductor utilizing advanced three-dimensional (3D) integration packaging, such as by directly attaching one or more die or wafer, through silicon vias, through mold vias, or other advanced methods.

## Nearby sections

- [15 C.F.R. § 231.101 (2026) § 231.101   Existing facility.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_101.md)
- [15 C.F.R. § 231.102 (2026) § 231.102   Foreign country of concern.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_102.md)
- [15 C.F.R. § 231.103 (2026) § 231.103   Foreign entity.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_103.md)
- [15 C.F.R. § 231.104 (2026) § 231.104   Foreign entity of concern.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_104.md)
- [15 C.F.R. § 231.105 (2026) § 231.105   Joint research.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_105.md)
- [15 C.F.R. § 231.106 (2026) § 231.106   Knowingly.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_106.md)
- [15 C.F.R. § 231.107 (2026) § 231.107   Legacy semiconductor.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_107.md)
- [15 C.F.R. § 231.108 (2026) § 231.108   Material expansion.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_108.md)
- [15 C.F.R. § 231.109 (2026) § 231.109   Members of the affiliated group.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_109.md)
- [15 C.F.R. § 231.110 (2026) § 231.110   Person.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_110.md)
- [15 C.F.R. § 231.111 (2026) § 231.111   Predominately serves the market.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_111.md)
- [15 C.F.R. § 231.112 (2026) § 231.112   Required agreement.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_112.md)
- [15 C.F.R. § 231.113 (2026) § 231.113   Research and development.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_113.md)
- [15 C.F.R. § 231.114 (2026) § 231.114   Secretary.](https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_114.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T15_P231_S231_107. Check the current official text before relying on it. Not legal advice.