Patent ID: 7703200
Filing Date: 2010-04-27
Classification: H05K,Y10T

Abstract:
1. A packaging method for assembling a screw to a printed circuit board (PCB), comprising the steps of: (a) Providing a screw, which includes a head, a threaded shank projected from a lower end of the head, and a ferrule enclosing the threaded shank and elastically movably fitted in the head; (b) Mounting a stop ring on the threaded shank, such that the stop ring is pressed against a lower end of the ferrule to maintain a predetermined height from top of the head to bottom of the ferrule; (c) Providing a PCB having a plurality of through holes provided thereon, and applying a layer of solder on a top of the PCB; (d) Using a tool to fetch the screw and moving the tool to align the threaded shank of the screw with one of the through holes on the PCB; (e) Releasing the screw from the tool, so that the screw falls and a flange axially extended from the lower end of the ferrule of the screw is extended into the through hole on the PCB; (f) Heating to melt the layer of solder, and allowing the molten solder to cool down to room temperature and become hardened again to thereby fixedly hold the ferrule to the PCB with the flange of the ferrule firmly fitted in the through hole on the PCB; and (g) Removing the stop ring from the threaded shank of the screw.