Selectively demetallizing aluminum

(57) A summary and the purpose. Were supported on the polymer substance or the substance of other microwave permeability. Or the metal in which etching removal with a thickness of at least about 1 micron of self-bearing properties is possible, and alternative 脱金属 of the aluminum especially joined to the base material of flexible polymer with adhesives are realized. Composition The lamination object which covered with the pattern of the request of an etching agent-proof resistance substance, and carried out protection covering with this specific pattern on the metal layer is repeated with time etching solutions enough next for full etching, and is contacted, and a remains pattern part is washed after the completion of etching, and it is made to dry.