Light source board, manufacturing method thereof, and luminous keyboard using the same

A light source board, comprising:

• a substrate;
• a metal reactive layer disposed on the substrate;
• a metal conductive layer disposed on the metal reactive layer;
• a first metal protective layer disposed on the metal conductive layer;
• a metal alloy layer disposed on the first metal protective layer;
• and
• at least one light source disposed on the metal alloy layer, wherein a material of the metal alloy layer is a Sn—Bi type alloy or a Sn—Ag—Cu type alloy, and arrangements of materials of the metal reactive layer, the metal conductive layer and the first metal protective layer are respectively an arrangement of silver paste, copper and gold, an arrangement of silver paste, nickel and gold, an arrangement of silver paste, silver and gold, an arrangement of silver paste, copper and nickel, an arrangement of silver paste, silver and nickel, an arrangement of copper paste, copper and gold, or an arrangement of copper paste, nickel and gold, an arrangement of copper paste, silver and gold, and arrangement of copper paste, copper and nickel, an arrangement of copper paste, silver and nickel.

A light source board, comprising:

• a substrate;
• a metal reactive layer disposed on the substrate;
• a metal conductive layer disposed on the metal reactive layer;
• a first metal protective layer disposed on the metal conductive layer;
• a second metal protective layer disposed on the first metal protective layer;
• a metal alloy layer disposed on the second metal protective layer;
• and
• at least one light source disposed on the metal alloy layer, wherein a material of the metal alloy layer is a Sn—Bi type alloy or a Sn—Ag—Cu type alloy, and arrangements of materials of the metal reactive layer, the metal conductive layer, the first metal protective layer and the second metal protective layer are respectively an arrangement of silver paste, silver, nickel and gold, an arrangement of silver paste, copper, nickel and gold, an arrangement of copper paste, silver, nickel and gold, or an arrangement of copper paste, copper, nickel and gold.