Title:
MULTILAYER RESIN SUBSTRATE AND METHOD FOR MANUFACTURING MULTILAYER RESIN SUBSTRATE
Document Type and Number:
WIPO Patent Application WO/2022/019156
Kind Code:
A1
Abstract:
According to the present invention, a metal foil layer includes: a metal foil layer upper main surface; a metal foil layer lower main surface having greater surface roughness than the metal foil layer upper main surface; and a metal foil layer side surface which is the surface excluding the metal foil layer upper main surface and metal foil layer lower main surface among the surfaces of the metal foil layer. The metal foil upper layer main surface is in contact with an upper resin layer, the metal foil layer lower main surface is in contact with a lower resin surface, and a part of a lower main surface of the upper resin layer and a part of an upper main surface of the lower resin layer are in contact with each other, thereby forming a layer interface. In a cross-section parallel to the top-bottom direction of the laminated body of the metal foil layer, a direction, facing the outside of a region surrounded by the surface of the metal foil layer from the inside of the region surrounded by the surface of the metal foil layer, among directions perpendicular to the top-bottom direction of the laminated body is defined as an in-out direction. In a cross-section parallel to the top-bottom direction of the laminated body of the metal foil layer, the metal foil layer side surface has an outside place and an inside place which are positioned in portions where the upper resin layer is in contact with the side surface, and the inside place is positioned below the outside place and positioned further inward than the outside place in the in-out direction.
Inventors:
FUJIMOTO ASATO (JP)
Application Number:
PCT/JP2021/026064
Publication Date:
January 27, 2022
Filing Date:
July 12, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H05K1/02
Domestic Patent References:
| WO2011007659A1 | 2011-01-20 | |||
| WO2019107430A1 | 2019-06-06 | |||
| WO2018155014A1 | 2018-08-30 |
Foreign References:
| JP2013041858A | 2013-02-28 | |||
| JPS6482595A | 1989-03-28 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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