| abstract |
AN EXTERNAL ELECTRODE OF AN ELECTRONIC COMPONENT IS OBTAINED BY SUBSEQUENTLY FORMING A PLURALITY OF COATING LAYERS ON A SURFACE OF A BASE LAYER (13). FIRST, A FIRST COPPER LAYER (14) IS FORMED ON THE SURFACE OF THE BASE LAYER (13) BY A STRIKE ELECTROPLATING METHOD AND THEN A SECOND COPPER LAYER (15) IS ELECTROPLATED ON A SURFACE OF THE FIRST COPPER LAYER (14). SUBSEQUENTLY, A NICKEL LAYER (16) IS ELECTROPLATED ON A SURFACE OF THE SECOND COPPER LAYER (15) AND, FINALLY, A SOLDER LAYER IS ELECTROPLATED ON A SURFACE OF THE NICKEL LAYER (16). |