Patent ID: 11929724
Assignee: SHENZHEN NEWSONIC TECHNOLOGIES CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for fabricating a surface acoustic wave (SAW) device, comprising:
forming an interdigital transducer (IDT) having lead-out portions and arrays of interdigital electrodes on a substrate, wherein the arrays of interdigital electrodes include central portions, end portions, and intermediate portions between the end portions and the lead-out portions;
forming a protective layer on the IDT;
forming a first temperature compensation layer on the protective layer;
forming openings in the first temperature compensation layer to expose portions of the protective layer on the central portions and the intermediate portions of the arrays of interdigital electrodes;
etching the exposed portions of the protective layer, and etching the central portions and the intermediate portions of the arrays of interdigital electrodes to a preset thickness, to form protruding structures at the end portions of the arrays of interdigital electrodes;
forming a second temperature compensation layer on the first temperature compensation layer and on the central portions and the intermediate portions of the arrays of interdigital electrodes; and
forming a passivation layer on the second temperature compensation layer.