Substrate motherboard and manufacturing method thereof, driving substrate and display device

A substrate motherboard, comprising:

• a first substrate base comprising an active region for a driving substrate and a non-active region surrounding the active region;
• a first conductive pattern layer on the first substrate base, comprising a plurality of signal lines in the active region;
• at least one first insulating layer on a side of the first conductive pattern layer distal to the first substrate base;
• and
• a second conductive pattern layer on a side of the at least one first insulating layer distal to the first substrate base, comprising a plurality of connection terminals in the active region, wherein the plurality of connection terminals are electrically coupled to corresponding signal lines of the plurality of signal lines,
• wherein the substrate motherboard further comprises a plurality of leading-out wires and a plurality of detection terminals, the plurality of detection terminals are in the non-active region, first ends of the plurality of leading-out wires are electrically coupled to at least one connection terminal of the plurality of connection terminals respectively, and the plurality of leading-out wires extend to the non-active region to be electrically coupled to corresponding detection terminals through second ends of the plurality of leading-out wires.