The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 2022
Filed:
Oct. 23, 2019
Agc Inc., Chiyoda-ku, JP;
Tomoya Hosoda, Chiyoda-ku, JP;
Tatsuya Terada, Chiyoda-ku, JP;
Atsumi Yamabe, Chiyoda-ku, JP;
Nobutaka Kidera, Chiyoda-ku, JP;
Wataru Kasai, Chiyoda-ku, JP;
AGC Inc., Chiyoda-ku, JP;
Abstract
The purpose of the present invention is to provide a fluororesin film or fluororesin laminate excellent in heat resistance and excellent in interlayer adhesion to an object to be laminated, such as a prepreg, a method for producing a hot pressed laminate using said film or laminate, and a method for producing a printed circuit board. The fluororesin film contains a fluororesin having a melting point of from 260 to 380° C., and has an arithmetic average roughness Ra of at least 3.0 nm when inside of 1 μmof at least one surface thereof in the thickness direction is measured by an atomic force microscope. The laminatehas a layer Acontaining said fluororesin and a layer Bmade of another substrate, wherein the layer Ahas an arithmetic average roughness Ra of at least 3.0 nm when inside of 1 μmof a second surfacethereof is measured by an atomic force microscope.