ELECTRONIC ELEMENT, SURFACE ACOUSTIC WAVE ELEMENT, METHOD FOR MOUNTING THEM, MANUFACTURE OF ELECTRONIC PARTS OR SURFACE ACOUSTIC WAVE DEVICE, AND SURFACE ACOUSTIC WAVE DEVICE

摘要

PROBLEM TO BE SOLVED: To prevent the breakage, electrical disconnection, etc., of an electronic element by forming an intermediate electrode on an electrode pad and a base electrode containing such a metallic material that can deteriorate the orientational property of the intermediate electrode under the intermediate electrode. SOLUTION: An electrode pad 2 which is electrically connected to a comb-shaped electrode is formed on the surface of a piezoelectric substrate 1, namely, on the surface on which the comb-shaped electrode is formed. On the pad 2, an intermediate electrode 3 composed of Al is provided and a base electrode 4 composed of NiCr which is a metallic material that can deteriorate the orientational property of the electrode 3 is formed under the electrode 3. Then a bump electrode 6 composed of an Au component is provided on the intermediate electrode 3, and a package electrode 7 formed on a package container 8 is faced oppositely to the intermediate electrode 3 through the bump electrode 6 and connected to the electrode 3 by pressing the electrode 7 against the electrode 3 while an ultrasonic wave is emitted.