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:
May. 11, 2021
Filed:
Mar. 22, 2018
Guangzhou Fang Bang Electronic Co., Ltd., Guangdong, CN;
Zhi Su, Guangdong, CN;
GUANGZHOU FANG BANG ELECTRONIC CO., LTD., Guangdong, CN;
Abstract
Disclosed are an electromagnetic interference shielding film, a circuit board and a preparation method for the electromagnetic Interference shielding film. The electromagnetic interference shielding film includes a first shielding layer, a second shielding layer, an adhesive film layer and multiple convex particles, wherein a second surface of the first shielding layer is an undulating uneven surface; the multiple convex particles are adhered on the second surface of the first shielding layer; the second shielding layer is disposed on the second surface of the first shielding layer and covers the multiple convex particles, thereby forming a protrusion portion on an outer surface of the second shielding layer and forming a recessed portion at other positions; the undulation degree of the outer surface of the second shielding layer is greater than that of the second surface; and the adhesive film layer is disposed on the outer surface of the second shielding layer.