Electronic device, electron source and manufacturing method for electronic device

A manufacturing method for an electronic device substrate, comprising:

• forming a substrate whose surface has an insulating region and an electroconductive region;
• performing surface treatment on the substrate for reducing a contact angle in the electroconductive region to less than 80°;
• and
• forming a resistance film to extend over the electroconductive region and the insulating region of the substrate on which the surface treatment is performed.

A manufacturing method for an electronic device substrate, comprising:

• forming a plurality of electron-emitting devices and a plurality of porous wirings for driving the plurality of electron-emitting devices on a part of an insulating substrate;
• and
• applying a solution containing electroconductive material or precursor onto a surface of the insulating substrate having the plurality of electron-emitting devices and the plurality of porous wirings formed thereon and drying the solution containing electroconductive material or precursor to thereby form a resistance film extending over the plurality of porous wirings and the surface of the insulating substrate,
• wherein the solution containing electroconductive material or precursor is applied in an amount not smaller than a saturation point of solution absorption of the plurality of porous wirings.