Patent ID: 11967941
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 mounting substrate including a first major surface and a second major surface that face each other, the first major surface being a major surface on which a bump-mounting electrode land used for bump mounting is provided; and
an acoustic wave element chip including:
a piezoelectric substrate including a major surface; and
a functional electrode, and a bump used for mounting, the functional electrode and the bump being located over the major surface of the piezoelectric substrate; wherein

the bump of the acoustic wave element chip is joined to the bump-mounting electrode land located on the first major surface of the mounting substrate;
the acoustic wave device further comprises a heat radiation pattern located over the first major surface of the mounting substrate, the heat radiation pattern being located within a region facing the functional electrode of the acoustic wave element chip;
the heat radiation pattern is connected to an internal layer portion of the mounting substrate located between the first major surface and the second major surface; and
the heat radiation pattern is not electrically connected to the bump-mounting electrode land on the first major surface.