Method for bonding heat sink

A method for bonding a heat sink, wherein the method comprising steps of:

• placing a workpiece to be processed in a lower jig;
• supplying an adhesive along a predetermined path to a surface of the workpiece;
• after a suction head of an upper jig picks up the heat sink, moving the upper jig to assemble with the lower jig to form a closed space, wherein the heat sink and the workpiece are positioned within the closed space;
• evacuating the closed space to create a negative pressure environment;
• driving the suction head to move toward the workpiece and bonding the heat sink to the workpiece, during which at least one gap is formed between the heat sink and the adhesive;
• continuing to drive the suction head to move toward the workpiece to apply pressure to the heat sink, thereby creating a negative pressure within the gap;
• and
• after bonding the heat sink to the workpiece, restoring the negative pressure environment to normal atmospheric pressure, allowing the adhesive surrounding the gap to fill the gap.