High-Purity and Ultra-High-Purity Copper Explained

High-Purity and Ultra-High-Purity Copper Explained

High-purity copper contains at least 99.999% copper (5N purity), where "N" indicates purity level - more Ns mean higher purity. Current standards classify high-purity copper into four grades: HPCu-7N, HPCu-6N5, HPCu-6N, and HPCu-5N. The industry generally considers copper exceeding 99.9999% purity as ultra-high-purity copper.

Primary Uses of High-Purity Copper
The semiconductor and flat-panel display industries drive most demand for high-purity copper:

• Semiconductor sputtering targets require minimum 5N5 purity (99.9995%)

• Flat-panel display targets need at least 5N purity (99.999%)

Market Position of High-Purity Copper
This specialized material plays a vital role in manufacturing sputtering targets for integrated circuits and large-area displays. As a key enabler of microelectronics innovation, high-purity copper supports advancements across the semiconductor sector.

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