Patent ID: 11936359
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An acoustic wave device, comprising:
a substrate;
an interdigital transducer (IDT) electrode including a plurality of electrode fingers on a main surface of the substrate; and
a protection film covering the main surface of the substrate, and side surfaces and upper surfaces of the plurality of electrode fingers; wherein
the protection film includes a portion covering the main surface of the substrate, an intermediate portion between two electrode fingers of the plurality of electrode fingers adjacent to each other, and a vicinity portion of the electrode fingers in a vicinity of the two electrode fingers, the intermediate portion being thicker than the vicinity portion; and
a maximum thickness of the protection film is equal to or less than about half of a thickness of the IDT electrode.