Phase Shift Wafer Inspection System from Mexico
A phase shift wafer inspection system uses coherence scanning interferometry to characterize semiconductor wafer surfaces at angstrom-level precision. It detects subtle thickness variations that standard optical systems cannot resolve, making it essential for advanced semiconductor manufacturing quality control. This product falls under tariff item 9031.41.00 as an optical instrument specifically designed for inspecting semiconductor wafers.
Duty Rate — Mexico → Canada
Import Tips
• Ensure the system is described as 'for inspecting semiconductor wafers or devices' on commercial invoices to support classification under 9031.41.00
• Be prepared to provide technical documentation to the CBSA demonstrating the optical inspection function
• Verify whether the system includes any parts that might be classified separately under Chapter 90 notes