Composite alloy bonding wire and manufacturing method thereof

Abstract

A manufacturing method for a composite alloy bonding wire and products thereof. A primary material of Ag is melted in a vacuum melting furnace, and then a secondary metal material of Pd is added into the vacuum melting furnace and is co-melted with the primary material to obtain a Ag—Pd alloy solution. The obtained Ag—Pd alloy solution is drawn to obtain a Ag—Pd alloy wire. The Ag—Pd alloy wire is then drawn to obtain a Ag—Pd alloy bonding wire with a predetermined diameter.

1 . A manufacturing method for a composite alloy bonding wire, comprising the steps in order of:
 a) providing a primary material of Ag;   b) melting the primary material in a vacuum melting furnace, adding a secondary metal material of Pd into the vacuum melting furnace and co-melting with the primary material in the vacuum melting furnace to obtain a Ag-Pd alloy solution;   c) continuously casting and drawing the Ag-Pd alloy solution to obtain a Ag-Pd alloy wire with a diameter of 4-8 mm to be rewired by a reeling machine; and   d) drawing the rewired Ag-Pd alloy wire to obtain a Ag-Pd alloy bonding wire with a predetermined diameter.   
   
   
       2 . The manufacturing method according to  claim 1 , wherein the weight percent of Ag in step a) is 90.00%-99.99%. 
   
   
       3 . (canceled) 
   
   
       4 . The manufacturing method according to  claim 1 , wherein the surface of the Ag-Pd alloy bonding wire is cleaned and is annealed after step d). 
   
   
       5 . (canceled) 
   
   
       6 . (canceled) 
   
   
       7 . (canceled) 
   
   
       8 . The manufacturing method according to  claim 1 , wherein the step d) further includes the steps of:
 d1) drawing by a first thick drawing machine to obtain a Ag-Pd alloy wire with a diameter of 3 mm or smaller than 3 mm;   d2) drawing by a second thick drawing machine to obtain a Ag-Pd alloy wire with a diameter of 1 mm or smaller than 1 mm;   d3) drawing by a first thin drawing machine to obtain a Ag-Pd alloy wire with a diameter of 0.5 mm or smaller than 0.5 mm;   d4) drawing by a first thin drawing machine to obtain a Ag-Pd alloy wire with a diameter of 0.5 mm or smaller than 0.5 mm; and   d5) drawing by a second thin drawing machine, a very thin drawing machine and an ultra thin drawing machine to obtain a Ag-Pd alloy wire with a diameter of 0.050 mm to 0.010 mm.