US 11,890,853 B2
Resin layered product, dielectric layer, metal foil with resin, capacitor element, and printed wiring board with built-in capacitor
Yoshihiro Yoneda, Ageo (JP); Toshihiro Hosoi, Ageo (JP); and Tetsuro Sato, Ageo (JP)
Assigned to MITSUI MINING & SMELTING CO., LTD., Tokyo (JP)
Appl. No. 17/795,376
Filed by MITSUI MINING & SMELTING CO., LTD., Tokyo (JP)
PCT Filed Jan. 19, 2021, PCT No. PCT/JP2021/001625
§ 371(c)(1), (2) Date Jul. 26, 2022,
PCT Pub. No. WO2021/153339, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 2020-011799 (JP), filed on Jan. 28, 2020.
Prior Publication US 2023/0107922 A1, Apr. 6, 2023
Int. Cl. B32B 7/025 (2019.01); B32B 15/08 (2006.01); B32B 15/20 (2006.01); B32B 27/28 (2006.01); B32B 27/38 (2006.01)
CPC B32B 7/025 (2019.01) [B32B 15/08 (2013.01); B32B 15/20 (2013.01); B32B 27/281 (2013.01); B32B 27/38 (2013.01); B32B 2250/02 (2013.01); B32B 2255/06 (2013.01); B32B 2264/102 (2013.01); B32B 2307/204 (2013.01); B32B 2311/12 (2013.01); B32B 2457/08 (2013.01); B32B 2457/16 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A resin laminate comprising a first layer composed of a first resin composition and a second layer composed of a second resin composition provided on one surface of the first layer,
wherein the first resin composition comprises
a resin component comprising an epoxy resin, a diamine compound, and a polyimide resin, and
a dielectric filler being a complex metal oxide comprising at least two selected from the group consisting of Ba, Ti, Sr, Pb, Zr, La, Ta, and Bi, in an amount of 60 parts by weight or more and 85 parts by weight or less based on 100 parts by weight of solids of the first resin composition,
wherein the content of the polyimide resin in the first resin composition is 20 parts by weight or more and 60 parts by weight or less based on 100 parts by weight of the resin component, and
wherein the second resin composition comprises
a resin component which comprises an epoxy resin and a diamine compound but is free of polyimide resin, and
a dielectric filler being a complex metal oxide comprising at least two selected from the group consisting of Ba, Ti, Sr, Pb, Zr, La, Ta, and Bi, in an amount of 70 parts by weight or more and 90 parts by weight or less based on 100 parts by weight of solids of the second resin composition.