Manufacturing insulated spherical weld gold wire for integrated circuit double-layer stacked package

A method for manufacturing an insulated spherical weld gold wire for integrated circuit double-layer stacked package, comprising the following steps:

• step S1:
• alloy sheet preparation:
• preparing a gold-cobalt alloy sheet, a gold-lanthanum alloy sheet, a gold-cerium alloy sheet and a gold-germanium alloy sheet, wherein each alloy sheet is prepared from 0.1%-0.5% by weight of cobalt, lanthanum, cerium, or germanium, respectively, and 99.5%-99.9% by weight of gold;
• step S2:
• alloy rod preparation:
• preparing a gold-cobalt-lanthanum-cerium-germanium gold alloy rod with a diameter of 8 mm from the gold-cobalt alloy sheet, gold-lanthanum alloy sheet, gold-cerium alloy sheet and gold-germanium alloy sheet prepared in step S1;
• step S3:
• stretching the 8 mm gold-cobalt-lanthanum-cerium-germanium gold alloy rod prepared in step S2 to form a spherical weld gold wire with a diameter of 0.011 mm-0.050 mm;
• step S4:
• annealing treatment:
• placing the spherical weld gold wire prepared in step S3 in a continuous annealing system, using high-purity nitrogen as a protective gas, at a temperature of 300° C.-600° C. and a speed of 40 m-80 m/min to perform a continuous annealing treatment;
• step S5:
• activation treatment:
• placing the annealed spherical weld gold wire in a continuous activation treatment system, wherein the wire passes through an activation acid solution with a concentration of 3%-10%, wherein the solution temperature is 50° C.-120° C.;
• meanwhile, applying ultrasonic waves with a frequency of 8 kHz-40 kHz to the solution, performing activation treatment at a speed of 40 m-80 m/min, and performing drying treatment during winding, wherein the drying temperature is 100° C.-120° C.;
• step S6:
• sputtering an insulating coating:
• diluting the high-performance polyaryletherketone coating to a concentration of 8%-15% using acetone, and adjusting the sputtering pressure to be 0.1 MPa-0.3 MPa;
• passing the wire through an annular outlet with a pressure of 0.15 MPa-0.2 MPa at a speed of 100 m/min-200 m/min, performing high-performance polyaryletherketone coating sputtering on wire surface at 360 degrees at constant velocity and pressure at the annular outlet to uniformly form a protective coating, adjusting the sputtering pressure and the running speed of the wire, and controlling the thickness of the coating to be 0.3 nm-1 nm;
• step S7:
• sputtered insulating coating curing treatment:
• passing the wire after sputter coating through a U-shaped curing device with a length of 500 mm and a heating temperature of 300° C.-400° C. at a speed of 100 m/min-200 m/min to cure the high-performance polyaryletherketone coating so that the coating firmly adheres to the surface of the wire;
• and
• step S8:
• multi-winding and sub-packaging:
• sizing the wire treated in step S7 in a single roll, controlling tension 0.8 g-8.0 g, and sizing in a single roll of 500 or 1000.