Panasonic Intellectual Property Management Co., Ltd.

Kensuke Mihara

Akira Kurozuka

Yuta Yamamoto

Soichiro Hiraoka

Takakiyo Harigai

Kazuki Komaki

Shinsuke Nakazono

Toshiaki Horie

A piezoelectric functional film includes a base layer and a piezoelectric layer. The piezoelectric layer contains niobium-doped lead zirconate titanate. The base layer contains one of niobium-doped lead titanate, (niobium, lanthanum)-doped lead titanate, and (niobium, lanthanum, magnesium)-doped lead titanate.

Piezoelectric functional film, actuator, and ink-jet head

A piezoelectric element includes a lower electrode, an upper electrode, and a piezoelectric layer disposed between the lower and upper electrodes. The piezoelectric layer contains (niobium, manganese)-doped lead zirconate titanate. In the (niobium, manganese)-doped lead zirconate titanate, a ratio of the number of moles of niobium to a total of the number of moles of niobium, manganese, zirconium, and titanium is not less than 10% and is not more than 25%. The ratio of the number of moles of manganese to the total of the number of moles of niobium, manganese, zirconium, and titanium is not less than 0.3% and is not more than 1.2%. This piezoelectric element decreases an internal electric field therein.

Piezoelectric element, actuator, and liquid droplet ejection head

An optical reflecting device includes a mirror, a frame connected to the mirror, and a driver beam configured to vibrate to rotate the mirror about a rotation axis. Rigidity of the frame is higher than rigidity of the mirror. The rotation axis is perpendicular to a line that connects a first connecting part to a second connecting part. This optical reflecting device can suppress a dynamic warp of the mirror.

Optical reflecting element

Growing community of inventors

Osaka, Japan

Kensuke Mihara