发明申请
- 专利标题: Process for the production of entry sheet for drilling and entry sheet
- 专利标题(中): 生产钻井和入境单的入境单的流程
-
申请号: US12457885申请日: 2009-06-24
-
公开(公告)号: US20100167041A1公开(公告)日: 2010-07-01
- 发明人: Yousuke Matsuyama , Reiki Akita , Takuya Hasaki
- 申请人: Yousuke Matsuyama , Reiki Akita , Takuya Hasaki
- 优先权: JP330447/2008 20081225
- 主分类号: B32B3/26
- IPC分类号: B32B3/26 ; B05D5/00
摘要:
A process for the production of an entry sheet for drilling a printed wiring board material, which process comprises forming a multi-layered water-soluble resin composition layer on at least one surface of a metal foil, wherein an aqueous solution of a water-soluble resin composition is applied to the metal foil, dried and solidified to form one water-soluble resin composition layer, the application, drying and solidification of the aqueous solution of the water-soluble resin composition are repeated at least once to form at least one water-soluble resin composition layer on the above one water-soluble resin composition layer, the multi-layered water-soluble resin composition layer is composed of these water-soluble resin composition layers, the multi-layered water-soluble resin composition layer has a thickness of at least 50 μm and is almost free from air bubbles, and an entry sheet for drilling a printed wiring board material obtained by the above process.
公开/授权文献
信息查询