Method for preparing copper foil with insulating layer and copper foil with insulating layer prepared by the method, and printed wiring board using the copper foil with insulating layer
US7163600B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2002 |
| Grant date | Jan 16, 2007 |
| Priority date | — |
| Expiry date | Jun 8, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31681
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To provide a method of manufacturing a material which can make a skeletal component as thin as possible to be contained in an insulating layer in a manufactured copper clad laminate and can securely prevent the direct contact between the nodular treatment surface of the attached copper foil and a skeletal component. In order to attain the object, here is adopted “a method of manufacturing a copper foil with an insulating layer 1 which method is a method of manufacturing a copper foil provided with a semi-cured insulating resin layer containing a skeletal component on one side surface of the copper foil, and is characterized in that: a first thermosetting resin layer 3 in an uncured or semi-cured state is provided on one side surface of a copper foil 2; a nonwoven fabric 5 or a woven cloth 5 to be a skeletal component is press-bonded onto a first thermosetting resin layer 3; a second thermosetting resin layer 7 is formed on a surface of a press-bonded nonwoven fabric 5 or woven cloth 5; and a semi-cured insulating layer containing the nonwoven fabric 5 or the woven cloth 5 is formed on one side surface of the copper foil 2 by drying into a semi-cured state.”
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.