Au-Ga-In Brazing Material

Abstract

A brazing material which can be melted at a suitable temperature at which damage is not given to a device inside a package upon sealing, and besides the brazing material is not remelted, e.g., upon mounting to a board, and which has a low temperature difference between a liquid and a solid. The brazing material is made of a Au—Ga—In ternary alloy, wherein weight concentrations of the elements lie within a region of a polygon with a point A (Au: 90%. Ga: 10%, In: 0%), a point B (Au: 70%, Ga: 30%, In: 0%), a point C (Au: 60%. Ga: 0%. In: 40%) and a point D (Au: 80%, Ga: 0%. In: 20%) as vertexes. excluding lines on which In and Ga become 0%, in a Au—Ga—In ternary phase diagram.

1 . A brazing material comprising a Au—Ga—In ternary alloy, wherein weight concentrations of the elements lie within a region of a polygon with a point A (Au: 90%, Ga: 10%, In: 0%), a point B (Au: 70%, Ga: 30%, In: 0%), a point C (Au: 60%. Ga: 0%, In: 40%) and a point D (Au: 80%, Ga: 0%, In: 20%) as vertexes, excluding lines on which In and Ga become 0%, in a Au—Ga—In ternary phase diagram. 
     
     
         2 . The brazing material according to  claim 1 , wherein the weight concentrations of the elements of the Au—Ga—In ternary alloy lie within a region of a polygon with a point E (Au: 86%, Ga: 13%, In: 1%), a point F (Au: 81%, Ga: 17%, In: 2%), a point G (Au: 79%, Ga: 10%, In: 11%) and a point H (Au: 84%, Ga: 6%, In: 10%) as vertexes, in the Au—Ga—In ternary phase diagram. 
     
     
         3 . The brazing material according to  claim 1 , wherein the weight concentrations of the elements of the Au—Ga—In ternary alloy lie within a region of a polygon with a point I (Au: 85%, Ga: 10%, In: 5%), a point J (Au: 80%, Ga: 14%, In: 6%), a point G (Au: 79%. Ga: 10%, In: 11%) and a point H (Au: 84%, Ga: 6%, In: 10%) as vertexes, in the Au—Ga—In ternary phase diagram. 
     
     
         4 . The brazing material according to  claim 1 , further comprising at least one addition element of Sn, Ge, Zn, Sb, Si, Bi and Al. 
     
     
         5 . The brazing material according to  claim 4 , wherein an added amount of the addition element is 0.001 to 3.0% by weight. 
     
     
         6 . The brazing material according to  claim 1 , wherein the brazing material has a material structure having a rapidly solidified structure formed from a molten state. 
     
     
         7 . A hermetic sealing member part comprising the brazing material according to  claim 1 . 
     
     
         8 . A sealing method comprising brazing components with the brazing material according to  claim 1 . 
     
     
         9 . The brazing material according to  claim 2 , wherein the weight concentrations of the elements of the Au—Ga—In ternary alloy lie within a region of a polygon with a point I (Au: 85%, Ga: 10%, In: 5%), a point J (Au: 80%, Ga: 14%, In: 6%), a point G (Au: 79%. Ga: 10%, In: 11%) and a point H (Au: 84%, Ga: 6%, In: 10%) as vertexes, in the Au—Ga—In ternary phase diagram. 
     
     
         10 . The brazing material according to  claim 2 , further comprising at least one addition element of Sn, Ge, Zn, Sb, Si, Bi and Al. 
     
     
         11 . The brazing material according to  claim 3 , further comprising at least one addition element of Sn, Ge, Zn, Sb, Si, Bi and Al. 
     
     
         12 . The brazing material according to  claim 9 , further comprising at least one addition element of Sn, Ge, Zn, Sb, Si, Bi and Al. 
     
     
         13 . The brazing material according to  claim 10 , wherein an added amount of the addition element is 0.001 to 3.0% by weight. 
     
     
         14 . The brazing material according to  claim 11 , wherein an added amount of the addition element is 0.001 to 3.0% by weight. 
     
     
         15 . The brazing material according to  claim 12 , wherein an added amount of the addition element is 0.001 to 3.0% by weight. 
     
     
         16 . The brazing material according to  claim 2 , wherein the brazing material has a material structure having a rapidly solidified structure formed from a molten state. 
     
     
         17 . The brazing material according to  claim 3 , wherein the brazing material has a material structure having a rapidly solidified structure formed from a molten state. 
     
     
         18 . The brazing material according to  claim 4 , wherein the brazing material has a material structure having a rapidly solidified structure formed from a molten state. 
     
     
         19 . The brazing material according to  claim 5 , wherein the brazing material has a material structure having a rapidly solidified structure formed from a molten state. 
     
     
         20 . The brazing material according to  claim 9 , wherein the brazing material has a material structure having a rapidly solidified structure formed from a molten state.