Patent Number: 
Section: claims

1. An electromagnetic wave interference (EMI)/radio frequency interference (RFI) shielding resin composite material, comprising:(A) a thermoplastic polymer resin;(B) about 20 to about 69 volume % of an electrically conductive filler having a polyhedral shape or being capable of forming a polyhedral shape;(C) a low-melting point metal including a primary component comprising tin, bismuth, lead, or a combination thereof, and a secondary component comprising copper, aluminum, nickel, silver, germanium, indium, zinc, or a combination thereof; and(D) a glass fiber filler. 2. The EMI/RFI shielding resin composite material of claim 1, wherein the EMI/RFI shielding resin composite material comprises:about 30 to about 85 volume % of the thermoplastic polymer resin (A);about 1 to about 10 volume % of the low-melting point metal (C). 3. The EMI/RFI shielding resin composite material of claim 1, comprising the glass fiber filler (D) in an amount of about 50 parts by weight or less based on about 100 parts by weight of the EMI/RFI shielding resin composite material. 4. The EMI/RFI shielding resin composite material of claim 1, wherein the thermoplastic polymer resin (A) comprises a polyamide, a polyalkylene terephthalate, a polyacetal, a polycarbonate, a polyimide, a polyphenylene oxide, a polysulfone, a polyphenylene sulfide, a polyamide imide, a polyether sulfone, a liquid crystal polymer, a polyetherketone, a polyetherimide, a polyolefin, acrylonitrile-butadiene-styrene, a polystyrene, a syndiotactic polystyrene, or a combination or blend thereof. 5. The EMI/RFI shielding resin composite material of claim 1, wherein the electrically conductive filler having a polyhedral shape or being capable of forming a polyhedral shape (B) comprises a needle-shaped electrically conductive filler having a polyhedral interior, a sheet-shaped electrically conductive filler having a polyhedral interior, a globular electrically conductive filler having a polyhedral interior, or a combination thereof. 6. The EMI/RFI shielding resin composite material of claim 5, wherein the needle-shaped electrically conductive filler having a polyhedral interior is a metal filler fabricated in a needle shape by pressing and cutting a dendrite metal filler fabricated through an electrolysis process or a porous metal filler fabricated through a thermal process, or a needle-shaped metal filler fabricated by polishing a metal lump;the sheet-shaped electrically conductive filler having a polyhedral interior is a metal filler fabricated in a sheet shape by pressing a dendrite metal filler fabricated through an electrolysis process or a porous metal filler fabricated through a thermal process, or a sheet-shaped metal filler fabricated through a pulverization process; andthe globular electrically conductive filler having a polyhedral interior is a globular metal filler fabricated through a melt injection process. 7. The EMI/RFI shielding resin composite material of claim 1, wherein the electrically conductive filler (B) is broken down or pulverized by a shear stress applied during a process of making the EMI/RFI shielding resin composite material to thereby form a polyhedral shape. 8. The EMI/RFI shielding resin composite material of claim 7, wherein the electrically conductive filler (B) has a shear strength of under about 300 MPa. 9. The EMI/RFI shielding resin composite material of claim 1, wherein the electrically conductive filler (B) comprises aluminum, copper, magnesium, iron, nickel, molybdenum, zinc, silver, alloys thereof or a combination thereof. 10. The EMI/RFI shielding resin composite material of claim 1, wherein the low-melting point metal (C) is a solid solution including two or more kinds of metal elements. 11. The EMI/RFI shielding resin composite material of claim 1, wherein the low-melting point metal (C) has a solidus temperature that is lower than a temperature of a process of making the EMI/RFI shielding resin composite material. 12. A molded product made using the EMI/RFI shielding resin composite material according to claim 1. 13. An electromagnetic wave interference (EMI)/radio frequency interference (RFI) shielding resin composite material, comprising:(A) a thermoplastic polymer resin;(B) about 20 to about 69 volume % of an electrically conductive filler having a polyhedral shape or being capable of forming a polyhedral shape;(C) a low-melting point metal having a solidus temperature that is lower than a temperature of a process of making the EMI/RFI shielding resin composite material; and(D) a glass fiber filler.