Microactuator, head suspension assembly and disk device

A microactuator comprising:

• a wiring substrate comprising a first connecting pad and a second connecting pad;
• and
• a piezoelectric element mounted on the wiring substrate and connected to the first connecting pad and the second connecting pad, wherein
• the piezoelectric element comprises
• a piezoelectric substrate formed of a piezoelectric material and comprising a first main surface, a second main surface opposing the first main surface, and a first side surface and a second side surface opposing each other,
• a first electrode comprising a first electrode portion provided in an end portion on a first side surface side on the first main surface, a second electrode portion provided on the first side surface, and a third electrode portion provided on the second main surface,
• a second electrode comprising a fifth electrode portion which has an electrode end facing the first electrode portion across a gap, is provided on the first main surface, and opposes the third electrode portion via the piezoelectric substrate, and a sixth electrode portion provided on the second side surface, and
• a protective insulating layer covering at least an end portion of the fifth electrode portion including the electrode end,
• the piezoelectric element is arranged such that the first main surface faces the wiring substrate, and
• the first electrode and the second electrode are connected to the first connecting pad and the second connecting pad, respectively, by a conductive adhesive material.