# US 2014/0191167 A1 · Conductive Composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191167 A1 - Document ID: US20140191167A1 - Status: Published application - Kind: A1 - Application number: 14/146,021 - Filed: 2014-01-02 - Published: 2014-07-10 - Earliest claimed: 2013-01-04 - Assignees: Giga Solar Materials Corp. - Applicants: Giga Solar Materials Corporation - Inventors: Wen-Jui HUANG; Pi-Yu HSIN; Chih-Hsien YEH - Web page: https://patentgrep.com/patent/US20140191167A1 ## CPC - H10F 77/211: {for photovoltaic cells} - C03C 8/18: containing free metals - H01B 1/16: the conductive material comprising metals or alloys - Y02E 10/50: Photovoltaic [PV] energy - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The present invention discloses a conductive paste for solar cell, including the following composition: (a) a silver powder; (b) a filler which can be coated with a conductor; (c) a glass frit; and further (d) a dispersing agent, an organic vehicle, and at least one additive. The filler, especially conductor coated, is used to replace part of silver powder as an ingredient of the conductive paste and thus reduces manufacturing cost without conductivity diminishing. This conductive paste can be utilized to form the front-side electrode of the substrate for solar cell. ## Claims ### Claim 1 A conductive paste, comprising: a silver powder; a filler, which can be coated with a conductor on at least part of surface; and a glass frit; wherein a total solids content of said conductive paste comprises 74˜92 wt % the silver powder, 2˜20 wt % the filler, and 2˜6 wt % the glass fit. ### Claim 2 (depends on 1) The conductive paste of claim 1, which further comprises an organic vehicle, a dispersing agent, and at least one additive. ### Claim 3 (depends on 1) The conductive paste of claim 1, wherein said glass frit is a lead glass frit. ### Claim 4 (depends on 1) The conductive paste of claim 1, wherein said glass frit further includes at least one element consisting of: Pb, Si, B, Zn, Sn, F, Li, Ti, Te, Ag, Na, K, Rb, Cs, Ge, Ga, In, Ni, Ca, Mg, Sr, Ba, Se, Mo, W, Y, As, La, Nd, Co, Gd, Eu, Ho, Yb, Lu, Bi, Ta, V, Zr, Mn, P, Cu, Ce, Nb, or a combination thereof. ### Claim 5 (depends on 1) The conductive paste of claim 1, wherein said filler includes an alloy or metal oxide, and wherein said conductor includes a metal, a non-metal, or an alloy which is electric conductive. ### Claim 6 (depends on 1) The conductive paste of claim 1, wherein a material of said filler includes aluminum oxide, zirconium oxide, silicon oxide, zinc oxide, cupric oxide or a combination thereof, and wherein said conductor includes silver or copper. ### Claim 7 (depends on 2) The conductive paste of claim 2, wherein said at least one additive is selected from the group consisting of ZrO2, V2O5, Ag2O, Er2O3, SnO, MgO, Nd2O3, TiO2, SeO2, PbO, Cr2O3, K2O, P2O5, MnO2, NiO, Sm2O3, GeO2, ZnF2, In2O3, Ga2O3, and the derivative thereof. ### Claim 8 (depends on 1) The conductive paste of claim 1, wherein the average grain size of said filler is approximately 0.1˜10 micron ### Claim 9 (depends on 2) The conductive paste of claim 2, wherein said glass frit further includes at least one element consisting of: Pb, Si, B, Zn, Sn, F, Li, Ti, Te, Ag, Na, K, Rb, Cs, Ge, Ga, In, Ni, Ca, Mg, Sr, Ba, Se, Mo, W, Y, As, La, Nd, Co, Gd, Eu, Ho, Yb, Lu, Bi, Ta, V, Zr, Mn, P, Cu, Ce, Nb, or a combination thereof. ### Claim 10 (depends on 2) The conductive paste of claim 2, wherein said organic vehicle includes diethylene glycol monobutyl ether, ethyl cellulose or hydrogenated castor oil. ### Claim 11 A conductive paste for a solar cell, said conductive paste comprising: a silver powder; a filler, which can be coated with a conductor on at least part of surface; and a glass frit, wherein a total solids content of said conductive paste comprises 74˜92 wt % the silver powder, 2˜20 wt % the filler, and 2˜6 wt % the glass frit. ### Claim 12 (depends on 11) The conductive paste of claim 11, which further comprises an organic vehicle, a dispersing agent, and at least one additive. ### Claim 13 (depends on 11) The conductive paste of claim 11, wherein said glass frit is a lead glass frit. ### Claim 14 (depends on 11) The conductive paste of claim 11, wherein said glass frit further includes at least one element consisting of: Pb, Si, B, Zn, Sn, F, Li, Ti, Te, Ag, Na, K, Rb, Cs, Ge, Ga, In, Ni, Ca, Mg, Sr, Ba, Se, Mo, W, Y, As, La, Nd, Co, Gd, Eu, Ho, Yb, Lu, Bi, Ta, V, Zr, Mn, P, Cu, Ce, Nb, or a combination thereof. ### Claim 15 (depends on 11) The conductive paste of claim 11, wherein said filler includes an alloy or metal oxide, and wherein said conductor includes a metal, a non-metal, or an alloy which is electric conductive. ### Claim 16 (depends on 11) The conductive paste of claim 11, wherein a material of said filler includes aluminum oxide, zirconium oxide, silicon oxide, zinc oxide, cupric oxide or a combination thereof, and wherein said conductor includes silver or copper. ### Claim 17 (depends on 12) The conductive paste of claim 12, wherein said at least one additive is selected from the group consisting of ZrO2, V2O5, Ag2O, Er2O3, SnO, MgO, Nd2O3, TiO2, SeO2, PbO, Cr2O3, K2O, P2O5, MnO2, NiO, Sm2O3, GeO2, ZnF2, In2O3, Ga2O3, and the derivative thereof. ### Claim 18 (depends on 12) The conductive paste of claim 12, wherein the average grain size of said filler is approximately 0.1˜10 micron. ### Claim 19 (depends on 12) The conductive paste of claim 12, wherein said glass frit further includes at least one element consisting of: Pb, Si, B, Zn, Sn, F, Li, Ti, Te, Ag, Na, K, Rb, Cs, Ge, Ga, In, Ni, Ca, Mg, Sr, Ba, Se, Mo, W, Y, As, La, Nd, Co, Gd, Eu, Ho, Yb, Lu, Bi, Ta, V, Zr, Mn, P, Cu, Ce, Nb, or a combination thereof. ### Claim 20 (depends on 12) The conductive paste of claim 12, wherein said organic vehicle includes diethylene glycol monobutyl ether, ethyl cellulose or hydrogenated castor oil.