Solder ball mounting tool

A solder paste mounting tool comprising:

• a base comprising a first surface, a second surface, a through hole, a first chip accommodating portion, and a plurality of positioning pillars, wherein the second surface and the first surface are located in the opposite face of the base, and the through hole passes through the first surface and the second surface, and the first chip accommodating portion and the positioning pillars are located on the first surface, and the position of the first chip accommodating portion is corresponding to the through hole;
• a positioning plate comprising a second chip accommodating portion and a plurality of first positioning holes corresponding to the positioning pillars, wherein when the first positioning holes are coupled with the positioning pillars, the second chip accommodating portion is aligned with the first chip accommodating portion;
• a screen plate comprising a mesh region and a plurality of second positioning holes corresponding to the positioning pillars, wherein when the second positioning holes are coupled with the positioning pillars and a chip is placed in the first chip accommodating portion, the mesh region is aligned with the first chip accommodating portion, and a plurality of connecting pads of the chip are applied with solder paste through the mesh region;
• and
• a pushing element movably disposed in the through hole, wherein the pushing element comprises a first end portion adjacent to the first surface and a second end portion adjacent to the second surface, when the second end portion is pressed, the chip is pushed by the first end portion and disengages from the first chip accommodating portion.