Electromagnetic Booster for Wireless Charging and Method of Manufacturing the Same

Abstract

Provided is an electromagnetic booster for wireless charging, comprising a magnet part having a magnetic sheet ( 10 ) and a coil part ( 20 ) disposed on the magnetic sheet, wherein the magnetic sheet is composed of a first magnetic sheet ( 11 ) member located at an edge portion and a second magnetic sheet member ( 12 ) located in a center portion on the same plane, wherein the first magnetic sheet member and the second magnetic sheet member have different permeability rates from each other.

What is claimed is: 
     
         1 . A wireless charging and near field communication module, comprising:
 a base film including a film body and an adhesive layer on the film body;   a first magnetic sheet member disposed on the adhesive layer and including an opening;   a second magnetic sheet member disposed on the adhesive layer and disposed in the opening of the first magnetic sheet member;   a first coil disposed on the first magnetic sheet member; and   a second coil disposed on the second magnetic sheet member;   wherein a bottom surface of the first magnetic sheet member is in direct contact with the adhesive layer,   wherein a bottom surface of the second magnetic sheet member is in direct contact with the adhesive layer,   wherein the first magnetic sheet member and the second magnetic sheet member have different magnetic permeability rates from each other, and   wherein a thickness of the second magnetic sheet member is greater than a thickness of the first magnetic sheet member.   
     
     
         2 . The wireless charging and near field communication module of  claim 1 , wherein a thickness from a top surface of the film body to a top surface of the second coil is greater than a thickness from the top surface of the film body to a top surface of the first coil. 
     
     
         3 . The wireless charging and near field communication module of  claim 1 , wherein the first magnetic sheet member is included an inner side surface and an outer side surface, and wherein the second magnetic sheet member is included an outer side surface,
 wherein the inner side surface of the first magnetic sheet member is spaced apart from the outer side surface of the second magnetic sheet member,   wherein a distance measured from the inner side surface of the first magnetic sheet member to the outer side surface of the first magnetic sheet member is greater than a distance measured from the inner side surface of the first magnetic sheet member to the outer side surface of the second magnetic sheet member.   
     
     
         4 . The wireless charging and near field communication module of  claim 3 , wherein the first magnetic sheet member is spaced apart from the second magnetic sheet member. 
     
     
         5 . The wireless charging and near field communication module of  claim 3 , wherein a thickness of the first magnetic sheet member or a thickness of the second magnetic sheet member is greater than the distance measured from the inner side surface of the first magnetic sheet member to the outer side surface of the second magnetic sheet member. 
     
     
         6 . The wireless charging and near field communication module of  claim 2 , wherein a thickness of the first magnetic sheet member or a thickness of the second magnetic sheet member is greater than a thickness of the film body. 
     
     
         7 . The wireless charging and near field communication module of  claim 1 , wherein the first magnetic sheet member and the first coil are for near field communication, and
 wherein the second magnetic sheet member and the second coil are for wireless charging.   
     
     
         8 . The wireless charging and near field communication module of  claim 7 , wherein the second magnetic sheet member comprises one element or an alloy of a combination of two or more elements selected from Fe, Ni, Co, Mn, Al, Zn, Cu, Ba, Ti, Sn, Sr, P, B, N, C, W, Cr, Bi, Li, Y, and Cd. 
     
     
         9 . The wireless charging and near field communication module of  claim 1 , wherein each of the first coil and the second coil includes a top surface, a bottom surface, and side surfaces;
 wherein each of the top surface of the first coil and the top surface of the second coil includes a planar surface, and   wherein each of the bottom surface of the first coil and the bottom surface of the second coil includes a planar surface.   
     
     
         10 . The wireless charging and near field communication module of  claim 8 , wherein the first coil or the second coil has a thickness in a range of from 5 μm to 340 μm. 
     
     
         11 . A wireless charging and near field communication module, comprising:
 a base film including a film body and an adhesive layer on the film body;   a first magnetic sheet member disposed on the adhesive layer and including an opening;   a second magnetic sheet member disposed on the adhesive layer and disposed in the opening of the first magnetic sheet member;   a first coil disposed on the first magnetic sheet member; and   a second coil disposed on the second magnetic sheet member,   wherein a bottom surface of the first magnetic sheet member is in direct contact with the adhesive layer,   wherein a bottom surface of the second magnetic sheet member is in direct contact with the adhesive layer,   wherein a thickness of the second magnetic sheet member is greater than a thickness of the first magnetic sheet member, and   wherein the first magnetic sheet member is spaced apart from the second magnetic sheet member.   
     
     
         12 . The wireless charging and near field communication module of  claim 11 , wherein a thickness from a top surface of the film body to a top surface of the second coil is greater than a thickness from the top surface of the film body to a top surface of the first coil. 
     
     
         13 . The wireless charging and near field communication module of  claim 11 , wherein the first magnetic sheet member includes an inner side surface and an outer side surface, and wherein the second magnetic sheet member includes an outer side surface,
 wherein the inner side surface of the first magnetic sheet member is spaced apart from the outer side surface of the second magnetic sheet member,   wherein a distance measured from the inner side surface of the first magnetic sheet member to the outer side surface of the first magnetic sheet member is greater than a distance measured from the inner side surface of the first magnetic sheet member to the outer side surface of the second magnetic sheet member.   
     
     
         14 . The wireless charging and near field communication module of  claim 13 , wherein the thickness of the first magnetic sheet member or the thickness of the second magnetic sheet member is greater than the distance measured from the inner side surface of the first magnetic sheet member to the outer side surface of the second magnetic sheet member. 
     
     
         15 . The wireless charging and near field communication module of  claim 12 , wherein the thickness of the first magnetic sheet member or the thickness of the second magnetic sheet member is greater than a thickness of the film body. 
     
     
         16 . The wireless charging and near field communication module of  claim 11 , wherein the first magnetic sheet member and the first coil are for near field communication, and
 wherein the second magnetic sheet member and the second coil are for wireless charging.   
     
     
         17 . The wireless charging and near field communication module of  claim 11 , wherein each of the first coil and the second coil includes a top surface, a bottom surface, and side surfaces;
 wherein each of the top surface of the first coil and the top surface of the second coil includes a planar surface, and   wherein each of the bottom surface of the first coil and the bottom surface of the second coil includes a planar surface.   
     
     
         18 . The wireless charging and near field communication module of  claim 17 , wherein the first coil or the second coil has a thickness in a range of from 5 μm to 340 μm. 
     
     
         19 . A mobile terminal, comprising;
 a battery; and   a wireless charging and near field communication module disposed on the battery,   wherein the wireless charging and near field communication module comprises:   a base film including a film body and an adhesive layer on the film body;   a first magnetic sheet member disposed on the adhesive layer and including an opening;   a second magnetic sheet member disposed on the adhesive layer and disposed in the opening of the first magnetic sheet member;   a first coil disposed on the first magnetic sheet member; and   a second coil disposed on the second magnetic sheet member,   wherein a bottom surface of the first magnetic sheet member is in direct contact with the adhesive layer,   wherein a bottom surface of the second magnetic sheet member is in direct contact with the adhesive layer,   wherein the first magnetic sheet member and the second magnetic sheet member have different magnetic permeability rates from each other, and   wherein a thickness of the second magnetic sheet member is greater than a thickness of the first magnetic sheet member.   
     
     
         20 . The mobile terminal of  claim 19 , wherein each of the first coil and the second coil includes a top surface, a bottom surface, and side surfaces;
 wherein each of the top surface of the first coil and the top surface of the second coil are includes a planar surface,   wherein each of the bottom surface of the first coil and the bottom surface of the second coil includes a planar surface, and   wherein a thickness from a top surface of the film body to the top surface of the second coil is greater than a thickness from the top surface of the film body to the top surface of the first coil.