Semiconductor wafer Hs Code

Semiconductor wafer harmonized system code

Product Overview Semiconductor wafers classified under HS Code 381800 are thin, flat slices of semiconductor material, primarily silicon, used as substrates for the fabrication of integrated circuits and microelectronic devices. These wafers typically exhibit diameters ranging from 100 mm to 300 mm, with thicknesses controlled to micrometer precision to ensure uniformity and optimal processing conditions. The wafers undergo multiple processing stages, including slicing, polishing, cleaning, and surface passivation, to achieve defect-free surfaces and precise crystallographic orientation. Within the HS Code 381800, subcategories differentiate wafers based on doping type (p-type, n-type), resistivity levels, and epitaxial layer presence. These wafers serve critical functions in semiconductor manufacturing, supporting applications in consumer electronics, telecommunications, automotive systems, and industrial automation. Their high purity, dimensional accuracy, and compatibility with photolithographic processes position them as essential components in the global semiconductor supply chain, offering competitive advantages in yield optimization and device performance consistency. HS Code Classification & Trade Specifications The HS Code 381800 falls under Chapter 38, which covers “Miscellaneous Chemical Products,” with Heading 3818 specifically addressing “Chemical elements doped for use in electronics.” The full six-digit code 381800 designates semiconductor wafers as doped or undoped chemical elements used in electronic applications. This classification is justified by the wafers’ role as chemically processed substrates integral to semiconductor device fabrication. Trade considerations for these wafers emphasize secure packaging to prevent contamination and mechanical damage, typically utilizing anti-static, moisture-barrier materials and rigid containers. Preservation methods include controlled atmosphere storage to minimize oxidation and particulate exposure. Shipping protocols adhere to strict handling standards aligned with international trade and customs regulations, ensuring compliance with WTO agreements and facilitating smooth customs clearance. Quality standards for semiconductor wafers are defined by industry norms such as SEMI standards (e.g., SEMI M1, M20), focusing on parameters like surface roughness (Ra < 0.5 nm), total thickness variation (TTV < 5 µm), and defect density. This rigorous classification and specification framework enables accurate tariff application and supports efficient international trade operations.

Semiconductor wafer Chapter Note

1.- This Chapter does not cover : (a) Separate chemically defined elements or compounds with the exception of the following : (1) Artificial graphite (heading 38.01); (2) Insecticides, rodenticides, fungicides, herbicides, anti-sprouting products and plant-growth regulators, disinfectants and similar products, put up as described in heading 38.08; (3) Products put up as charges for fire-extinguishers or put up in fire-extinguishing grenades (heading 38.13); (4) Certified reference materials specified in Note 2 below; (5) Products specified in Note 3 (a) or 3 (c) below; (b) Mixtures of chemicals with foodstuffs or other substances with nutritive value, of a kind used in the preparation of human foodstuffs (generally heading 21.06); (c) Products of heading 24.04; (d) Slag, ash and residues (including sludges, other than sewage sludge), containing metals, arsenic or their mixtures and meeting the requirements of Note 3 (a) or 3 (b) to Chapter 26 (heading 26.20); (e) Medicaments (heading 30.03 or 30.04); or (f) Spent catalysts of a kind used for the extraction of base metals or for the manufacture of chemical compounds of base metals (heading 26.20), spent catalysts of a kind used principally for the recovery of precious metal (heading 71.12) or catalysts consisting of metals or metal alloys in the form of, for example, finely divided powder or woven gauze (Section XIV or XV). 2.- (A) For the purpose of heading 38.22, the expression “certified reference materials” means reference materials which are accompanied by a certificate which indicates the values of the certified properties, the methods used to determine these values and the degree of certainty associated with each value and which are suitable for analytical, calibrating or referencing purposes. (B) With the exception of the products of Chapter 28 or 29, for the classification of certified reference materials, heading 38.22 shall take precedence over any other heading in the Nomenclature. 3.- Heading 38.24 includes the following goods which are not to be classified in any other heading of the Nomenclature : (a) Cultured crystals (other than optical elements) weighing not less than 2.5 g each, of magnesium oxide or of the halides of the alkali or alkaline-earth metals; (b) Fusel oil; Dippel's oil; (c) Ink removers put up in packings for retail sale; (d) Stencil correctors, other correcting fluids and correction tapes (other than those of heading 96.12), put up in packings for retail sale; and (e) Ceramic firing testers, fusible (for example, Seger cones). 4.- Throughout the Nomenclature, “municipal waste” means waste of a kind collected from households, hotels, restaurants, hospitals, shops, offices, etc., road and pavement sweepings, as well as construction and demolition waste. Municipal waste generally contains a large variety of materials such as plastics, rubber, wood, paper, textiles, glass, metals, food materials, broken furniture and other damaged or discarded articles. The term “municipal waste”, however, does not cover : (a) Individual materials or articles segregated from the waste, for example wastes of plastics, rubber, wood, paper, textiles, glass or metals, electrical and electronic waste and scrap (including spent batteries) which fall in their appropriate headings of the Nomenclature; (b) Industrial waste;(c) Waste pharmaceuticals, as defined in Note 4 (k) to Chapter 30; or (d) Clinical waste, as defined in Note 6 (a) below. 5.- For the purposes of heading 38.25, “sewage sludge” means sludge arising from urban effluent treatment plant and includes pre-treatment waste, scourings and unstabilised sludge. Stabilised sludge when suitable for use as fertiliser is excluded (Chapter 31). 6.- For the purposes of heading 38.25, the expression “other wastes” applies to : (a) Clinical waste, that is, contaminated waste arising from medical research, diagnosis, treatment or other medical, surgical, dental or veterinary procedures, which often contain pathogens and pharmaceutical substances and require special disposal procedures (for example, soiled dressings, used gloves and used syringes); (b) Waste organic solvents; (c) Wastes of metal pickling liquors, hydraulic fluids, brake fluids and anti-freezing fluids; and (d) Other wastes from chemical or allied industries. The expression “other wastes” does not, however, cover wastes which contain mainly petroleum oils or oils obtained from bituminous minerals (heading 27.10). 7.- For the purposes of heading 38.26, the term “biodiesel” means mono-alkyl esters of fatty acids of a kind used as a fuel, derived from animal, vegetable or microbial fats and oils whether or not used.