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

Claim 16:
17. 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
the protection film includes a portion covering a lower portion of the side surface of at least one of two electrode fingers and a portion covering an upper portion of the side surface of the at least one of the two electrode fingers, the portion covering the lower portion being thicker than the portion covering the upper portion.