Czochralski Crystal Puller Heating Chamber from Japan
This is the graphite or molybdenum heating chamber used in Czochralski crystal growers for pulling monocrystalline silicon boules in semiconductor manufacturing. It falls under HTS 8417.90.00.00 as a part of a nonelectric industrial furnace/oven designed for high-temperature crystal growth processes. The chamber maintains precise thermal gradients essential for defect-free crystal formation.
Duty Rate — Japan → United States
18.9%
Rate breakdown
9903.82.1015%Except as provided for in headings 9903.82.12, 9903.82.17 and 9903.85.68, derivative aluminum and steel articles with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 15 percent, as provided for in subdivision (f) of U.S. note 16 to this subchapter
9903.03.060%Articles of aluminum, of steel, or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; and semiconductor articles, of any country, as provided in subdivision (aa)(v) of U.S. note 2 to this subchapter
Import Tips
• Verify material certifications (graphite/molybdenum purity) meet semiconductor cleanroom standards; declare as furnace parts not complete machines to avoid Chapter 84 heading 8417.10; ensure thermal shock resistance documentation for customs valuation