Continuous overheated steam heat treatment apparatus and method for producing a conductive coating film

摘要

PROBLEM TO BE SOLVED: To obtain a continuous superheated steam heat treatment device which can continuously perform heat treatment for turning a copper paste coating into an electroconductive coating having a sufficient electroconductivity.SOLUTION: A continuous superheated steam heat treatment device comprises: a transfer part 130 for transferring a film 150; and a heat treatment furnace 110 through which the film 150 transferred by the transfer part 130 passes, and which heat-treats a copper paste coating passing together with the film 150 by superheated steam, and forms the electroconductive coating. The heat treatment furnace 110 has an introduction passage 115 and a lead-out passage 116 of the film 150. Ratios L/H of depths L to heights H of the introduction passage 115 and the lead-out passage 116 are not smaller than 3, respectively.