- Patent Title: Copper foil with carrier, production method for same, production method for coreless support with wiring layer, and production method for printed circuit board
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Application No.: US16080425Application Date: 2017-02-21
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Publication No.: US10886146B2Publication Date: 2021-01-05
- Inventor: Yoshinori Matsuura
- Applicant: MITSUI MINING & SMELTING CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: MITSUI MINING & SMELTING CO., LTD.
- Current Assignee: MITSUI MINING & SMELTING CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2016-037307 20160229
- International Application: PCT/JP2017/006422 WO 20170221
- International Announcement: WO2017/150283 WO 20170908
- Main IPC: B21C37/00
- IPC: B21C37/00 ; H01L21/48 ; B32B7/06 ; B32B5/16 ; H05K1/09 ; B32B7/02 ; B32B15/04 ; H01L23/495 ; C23C14/16 ; H05K3/02 ; C25D1/04 ; C23C14/06 ; H05K1/18 ; C23C14/35 ; C25D3/38 ; G03F7/16 ; H01L21/56 ; H01L21/683 ; H01L23/31 ; G03F7/11 ; G03F7/40 ; G03F7/09 ; H01L23/498

Abstract:
There is provided a copper foil provided with a carrier providing excellent chemical resistance against the copper flash etching solution during the formation of the wiring layer on the surface of the coreless support and excellent visibility of the wiring layer due to high contrast to the antireflective layer in image inspection after copper flash etching. The copper foil provided with a carrier comprises a carrier; a release layer provided on the carrier; an antireflective layer provided on the release layer and composed of at least one metal selected from the group consisting of Cr, W, Ta, Ti, Ni and Mo; and an extremely-thin copper layer provided on the antireflective layer; wherein at least the surface adjacent to the extremely-thin copper layer of the antireflective layer comprises an aggregate of metal particles.
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