An insulating colloidal material and a multilayer circuit structure are provided, wherein the insulating colloidal material includes a resin, trigger particles, and an organic solvent. The trigger particles are selected from any one of the group consisting of organometallic particles and ionic compounds. The ratio of the trigger particles to the insulating colloidal material is between 0.1 wt % and 10 wt %. At least one insulating colloidal layer in the multilayer circuit structure contains the trigger particles.