Light-emitting keyswitch, cap structure and cap structure manufacturing method thereof

A cap structure assembled with a lifting mechanism to be movable upward and downward relative to a board, the cap structure comprising:

• a cap having a top surface and a lateral contour surface;
• and
• a light-emitting layer comprising:
• a first pad layer disposed on the lateral contour surface;
• at least one lower electrode layer disposed on the top surface to be connected to the first pad layer, the at least one lower electrode layer having an opening;
• a second pad layer disposed on the lateral contour surface corresponding to the opening and spaced apart from the at least one lower electrode layer;
• a dielectric layer stacked on the lower electrode layer;
• an electroluminescent layer stacked on the dielectric layer;
• an upper electrode layer stacked on the electroluminescent layer and connected to the second pad layer;
• a transparent pattern layer stacked on the upper electrode layer;
• and
• an external trace structure connected to the first pad layer and the second pad layer for transmitting a power to the upper electrode layer and the lower electrode layer via the first pad layer and the second pad layer, so as to drive the electroluminescent layer to emit light to the transparent pattern layer.

A cap structure manufacturing method comprising:

• providing a cap, the cap having a top surface and a lateral contour surface;
• disposing a first pad layer on the lateral contour surface;
• disposing at least one lower electrode layer on the top surface, the at least one lower electrode layer being connected to the first pad layer and having an opening;
• disposing a second pad layer on the lateral contour surface corresponding to the opening, the second pad layer being spaced apart from the at least one lower electrode layer;
• stacking the at least one lower electrode layer, a dielectric layer, an electroluminescent layer, an upper electrode layer and a transparent pattern layer, the upper electrode layer being connected to the second pad layer;
• and
• connecting an external trace structure to the first pad layer and the second pad layer, the external trace structure transmitting a power to the upper electrode layer and the lower electrode layer via the first pad layer and the second pad layer for driving the electroluminescent layer to emit light to the transparent pattern layer.