Mitsui Kinzoku raises ultrathin copper foil capacity target for third time as optical demand surges

T2Covered by 1 source · first reported by JP/KR/TW: Korea Herald / Taipei Times / DigiTimes at 03 Nov, 09:05 UTC

Japan's Mitsui Kinzoku has announced its third capacity expansion plan since the start of fiscal 2026 for MicroThin, its ultrathin copper foil used in optical communications equipment. The company is accelerating production expansion to meet sustained growth in market demand.