Method of manufacturing automobile AC generator and method of manufacturing rectifier used in automobile AC generator

A method for manufacturing an automobile AC generator, comprising:

• a step for assembling a rectifier assembly constituted by a positive heat sink assembly manufactured by mounting a plurality of positive diodes on a positive heat sink, a negative heat sink assembly manufactured by mounting a plurality of negative diodes on a negative heat sink, and a circuit board assembly;
• a step for assembling said rectifier assembly to a rear bracket;
• a powder coating spraying step in which said rectifier assembly and said rear bracket are grounded, and then insulating powder coating charged with a plus polarity is sprayed to said rectifier assembly and said rear bracket, whereby said insulating powder coating being absorbed onto a surface of an exposed metal of said rectifier assembly and said rear bracket by the electrostatic force;
• and
• a heating process step for heating the powder coating to be hardened, which is covered on the surface of said exposed metal.