Electronic circuit production method using 3D layer shaping

An electronic circuit production method using 3D layer shaping, the method comprising:

• an insulating layer forming step of forming an insulating layer by repeatedly discharging an ultraviolet curable resin, flattening the ultraviolet curable resin, and curing the ultraviolet curable resin, the insulating layer including an accommodation section in which an electronic component may be disposed, the accommodation section being a recess defined by a bottom surface and side walls;
• a wiring forming step of forming a wiring by applying a first fluid containing a nano-sized metal nanoparticle on the insulating layer and curing the applied first fluid containing the metal nanoparticle;
• and
• a connection terminal forming step of forming a connection terminal electrically connected to the wiring by applying a second fluid containing a micro-sized metal microparticle and curing the applied second fluid containing the metal microparticle, wherein
• the first fluid and the second fluid are different from each other, a viscosity of the first fluid being lower than a viscosity of the second fluid,
• the first fluid is applied using an ink jet head, and the second fluid is applied using a dispenser or a printing device,
• the second fluid containing the metal microparticle is a viscous fluid in which the metal microparticle is contained in an adhesive made of a resin,
• in the connection terminal forming step, multiple metal microparticles are brought into contact with each other to be cured by curing the adhesive,
• in the wiring forming step, multiple metal nanoparticles are fused to each other to cure by heating the first fluid containing the metal nanoparticle, and
• in the connection terminal forming step, the connection terminal includes a first connection terminal provided on the bottom surface of the accommodation section to be connected to the electronic component disposed in the accommodation section, a second connection terminal that connects an electronic circuit of the insulating layer and an external device, and a third connection terminal that connects a probe pin connecting electronic circuits of multiple insulating layers to each other to the electronic circuit of the insulating layer.