Patent ID: 7537955
Filing Date: 2009-05-26
Classification: C09D,H01L,Y02E

Abstract:
1. A method comprising: formulating an ink comprising Cu-rich particles and solid Ga—In particles, wherein the step of formulating includes the steps of: placing solid Ga—In particles and Cu-rich particles into a carrier liquid having a temperature at or below 15° C., thereby forming a mixture, adding into the mixture at least one dispersion forming agent to form a second mixture and agitating the second mixture to form a dispersion while keeping the temperature of the carrier liquid at or below 15° C.; and further including the step of forming the solid Ga—In particles used in the step of placing, wherein the step of forming the solid Ga—In particles comprises: forming a Ga—In melt with a Ga/(Ga+In) molar ratio and a pre-determined melting temperature, adding the Ga—In melt in a liquid heated to at least to the pre-determined melting temperature, agitating the Ga—In melt and the liquid to form an emulsion comprising nano-size Ga—In melt particles, lowering the temperature of the emulsion to below 15° C. to solidify the nano-size Ga—In melt particles and to thereby form solid Ga—In particles, and removing the solid Ga—In particles.