Pressure sensor

A pressure sensor, comprising:

• a conductive substrate, including:
• a conductive-substrate body, having a conductive-layer disposing surface;
• and
• a conductive layer, disposed on the conductive-layer disposing surface, and having a central sensing region and two outer sensing regions separately located at two opposing sides out of the central sensing region;
• a ring-shaped spacer, disposed on the conductive-substrate body to make the conductive layer exposed therefrom;
• an inner spacer, disposed on the conductive layer, associating separately the ring-shaped spacer to form two outer sensing spaces exposed respectively from the two outer sensing regions and at least one central sensing space exposed from the central sensing region;
• and
• a sensing circuit substrate, disposed on the ring-shaped spacer and the inner spacer, including:
• a circuit-substrate body, extending from a first end to a second end in a first direction, having a circuit-disposing surface facing the conductive-layer disposing surface and disposed on the ring-shaped spacer and the inner spacer;
• a first sensing circuit, including:
• a first bus circuit, disposed along a side of the circuit-disposing surface by extending from the first end to the second end;
• and
• a plurality of first finger circuits, extending individually out from the first bus circuit in a second direction perpendicular to the first direction, distributed respectively in the central sensing region and the two outer sensing regions;
• and
• a second sensing circuit, includes:
• a second bus circuit, disposed along another side of the circuit-disposing surface by extending from the first end to the second end;
• and
• a plurality of second finger circuits, extending individually out from the second bus circuit in a direction reverse to the second direction to be integrated into a staggered arrangement with the first finger circuits, distributed respectively in the central sensing region and the two outer sensing regions;
• wherein an arrangement density of the first finger circuits and the second finger circuits in the central sensing region is larger than that in the two outer sensing regions.