South Korea’s Iljin Materials has developed a 1.5㎛ ultra-thin copper foil for semiconductor packaging, the industry’s thinnest level developed in Korea, the company said on Sunday.

Iljin Materials shares gained nearly 5 percent to trade at 43,200 won ($38.3) as of 11:30 am on Monday.

The producer dedicated to ultra-thin elecfoils as secondary battery materials in electric vehicles said the development marks the first achievement and second only to Japan’s Mitsui in the world.

The company anticipates sales in the new product will be realized from late this year.

The ultra-thin title is given to a thin copper foil whose thickness is less than 2㎛, and this is thin enough to be electron transparent.

The thickness of copper foils commonly used for EV batteries is 4.5 to 10㎛. Demand for ultra-thin copper foils are on the rise as semiconductor companies has increasingly implemented ultra-fine circuits.

By Shin Soo-hyun and Minu Kim

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