| 摘要 |
PURPOSE:To minimize the variance of resonance frequency by dipping a resonator in an etching solution to remove the unnecessary part of an electrode layer. CONSTITUTION:The electrode layer 2 of copper or silver is formed on the surface of a cylindrical dielectric 1, a resist film 3 is formed in a prescribed part of the electrode layer 2, then it is dipped in the etching solution and thus the unnecessary part of the layer 2 is removed. As an etchant, in the case of using for copper, a ferric chloride solution, an ammonium persulfote solution, a nitric acid solution, or a mixture of sodium hydroxide and sulfer can be used; in the case of using for silver, nitric acid solution, or a hot concentrated sulfuric acid can be used. In such a way, the titled resonator of least variance of resonance frequency can be obtained. |
