US Patent No. 9,264,016

PIEZOELECTRIC COMPONENT HAVING A COVER LAYER INCLUDING RESIN THAT CONTAINS TRANSLUCENT FILLER


Patent No. 9,264,016
Issue Date February 16, 2016 
Title Piezoelectric Component Having A Cover Layer Including Resin That Contains Translucent Filler
Inventorship Toshimasa Tsuda, Saitama (JP)
Assignee NIHON DEMPA KOGYO CO., LTD., Tokyo (JP)

Claim of US Patent No. 9,264,016

1. A piezoelectric component, comprising:
a piezoelectric element that includes: a piezoelectric plate; a comb-shaped electrode and an input/output electrode on a principal
surface of the piezoelectric plate; a cover layer disposed above the comb-shaped electrode; and a rib to form a void between
the comb-shaped electrode and the cover layer, wherein

the cover layer includes a photosensitive thermosetting resin in which translucent filler is contained,
wherein the piezoelectric element further includes:
an Under Bump Metal film, disposed at the piezoelectric plate side of the rib; and
a metal thin film, covering the cover layer and hermetically sealing the void,
wherein the piezoelectric component further includes:
an electrode terminal, integrally bonded on the piezoelectric element, the electrode terminal electrically connecting to the
input/output electrode of the piezoelectric element; and

a wiring board with a mounting terminal for external equipment,
wherein at least the piezoelectric plate and the wiring board are resin sealed.