AN ELECTROPLATING METHOD IN THE MANUFACTURE OF THE SURFACE MOUNT PRECISION METAL RESISTOR

摘要

The present invention relates to an electroplating method in the manufacture of the surface mount precision metal resistor, the manufacturing steps are as below: a flat-shaped metal substrate strip being die stamped with predefined resistance value; separating said metal substrate strip into electroplating portion and non-electroplating portion by the separating insulator; removing the impurities on the surface of said electroplating portion by the electrolytic cleansing; insetting all flat-shaped metal substrate strips onto the vertical rotating bucket for electroplating to form two copper electrode terminals; removing off the separating insulator on said non-electroplating portion; grinding and surface roughness process on both of the upper and lower surfaces of said two copper electrode terminals; die stamping and cutting said electroplated metal substrate strip into metal resistor chip one by one; wrapping said non-electroplating portion on each said metal resistor chip with packaging layer; and roller-electroplating with tin-layer on the surfaces of said two copper electrode terminals at each said packaged metal resistor chip, thus the final product of the surface mount precision metal resistor having been completely manufactured.