公开(公告)号：US20240015889A1

公开(公告)日：2024-01-11

申请号：US18044789

申请日：2021-09-09

Applicant: RESONAC CORPORATION

Inventor： Kei TOGASAKI ,  Kenichi IWASHITA ,  Keishi ONO ,  Mao NARITA ,  Kazuyuki MITSUKURA ,  Masaya TOBA

IPC: H05K1/18 ,  H05K3/12 ,  H05K3/18 ,  H05K3/02

CPC classification number: H05K1/181 ,  H05K3/1208 ,  H05K3/181 ,  H05K3/022

Abstract: A method for producing a wiring board, including: a step of pretreating the surface of a metal layer exposed into an opening by bringing the surface into contact with a pretreatment liquid at a predetermined pretreatment temperature; and a step of forming a copper plating layer on the metal layer by electrolytic plating. The resist layer and the pretreatment liquid are selected such that a mass change rate of the resist layer when the resist layer before being exposed and developed is immersed in the pretreatment liquid is −2.0% by mass or more. The mass change rate is a value calculated by Expression: Mass change rate (% by mass)={(W1−W0)/W0}×100. W1 is the mass of the resist layer after a laminated body including a resist layer 3 and a copper foil is immersed in the pretreatment liquid at the pretreatment temperature for 30 minutes.

公开(公告)号：US20240166897A1

公开(公告)日：2024-05-23

申请号：US18549171

申请日：2021-03-09

Applicant: Resonac Corporation

Inventor： Hiroyuki IZUMI ,  Kei TOGASAKI ,  Hiroshi YOKOTA

IPC: C09D7/80 ,  C09D5/02 ,  C09D7/40

CPC classification number: C09D7/80 ,  C09D5/022 ,  C09D7/69

Abstract: A method for producing a coating liquid, the method including: a preparation step of preparing an emulsion containing a polymer-based emulsifier, a binder resin, and a liquid medium, and aerogel particles; and a mixing step of mixing the emulsion and the aerogel particles prepared in the preparation step to agglomerate at least a portion of the aerogel particles, and obtaining a coating liquid containing agglomerates of the aerogel particles, the polymer-based emulsifier, the binder resin, and the liquid medium.

公开(公告)号：US20240341039A1

公开(公告)日：2024-10-10

申请号：US18294158

申请日：2022-07-29

Applicant: Resonac Corporation

Inventor： Kei TOGASAKI ,  Kazuyuki MITSUKURA ,  Masaya TOBA ,  Kenichi IWASHITA ,  Keishi ONO ,  Mao NARITA

IPC: H05K3/10 ,  C25D3/38 ,  C25D5/00 ,  C25D5/02 ,  C25D7/12 ,  H01L21/48 ,  H01L23/498 ,  H05K1/02

CPC classification number: H05K3/10 ,  C25D3/38 ,  C25D5/022 ,  C25D5/605 ,  C25D7/123 ,  H05K1/02 ,  H01L21/4846 ,  H01L23/49866 ,  H05K2203/11

Abstract: A method for manufacturing a wiring board, including: forming a resist layer on a seed layer comprising a metal provided on a support body; forming a pattern including an opening to which the seed layer is exposed in the resist layer by light exposure and development of the resist layer, and forming a copper plating layer on the seed layer exposed into the opening by electrolytic plating, in this order. The arithmetic mean roughness Ra of the surface of the seed layer on a side opposite to the support body is 0.05 μm or more and 0.30 μm or less.