Undiffused silicon wafers

Undiffused silicon wafers for electronic use

NO PGA · STANDARD CUSTOMS PROCEDURE

HSN 3818 00 10 (Undiffused silicon wafers) is not covered by a Bureau of Indian Standards Quality Control Order and carries no Partner Government Agency clearance requirement at the tariff-line level. Import follows the standard customs procedure: Importer-Exporter Code (IEC), bill of entry, commercial invoice, packing list. Doped chemical elements or compounds in other forms, or silicon wafers that have undergone diffusion processing, may fall under distinct tariff treatment within Chapter 38 or adjacent electronics-input classifications.

No partner government agency notification covers this tariff line.

A word of counsel

The principal risk at this tariff line is misclassification: undiffused wafers are an intermediate semiconductor input, and customs re-examination of the diffusion state, doping specification, or downstream use can prompt reclassification to a tariff line that does carry compliance or a higher duty rate. Such reclassification triggers retrospective duty recovery and potential detention pending resolution. Verify the wafer's diffusion status, dopant type, and resistivity specification against the customs tariff description before shipment.

Need a regulatory steer on this product?

Speak to a regulatory counsel about your specific HSN, IS, and supplier situation.

Speak to an Expert

Frequently asked

Does HSN 3818 00 10 require any pre-import registration?

A valid Importer-Exporter Code is required for any commercial import; no product-specific registration applies to this tariff line.

What changes if the silicon wafers have undergone diffusion or further processing?

Diffused or otherwise processed silicon wafers may be classified under a different tariff line within Chapter 38 or related chapters, potentially attracting distinct duty rates or compliance requirements.

Last verified against gazette notifications: 2026-05-16. Source: BIS / DGFT / Indian Customs CUSDATA.