| US 7,501,745 B2 | ||
| Piezoelectric vibrator | ||
| Burhanettin Koc, Suwon (Korea, Republic of); Dong Kyun Lee, Seoul (Korea, Republic of); Jung Ho Ryu, Suwon (Korea, Republic of); and Byung Woo Kang, Seoul (Korea, Republic of) | ||
| Assigned to Samsung Electro-Mechanics Co., Ltd., Suwon-si, Gyunggi-do (Korea, Republic of) | ||
| Filed on Mar. 20, 2007, as Appl. No. 11/688,658. | ||
| Claims priority of application No. 10-2006-0031621 (KR), filed on Apr. 06, 2006. | ||
| Prior Publication US 2007/0236106 A1, Oct. 11, 2007 | ||
| Int. Cl. H03H 41/047 (2006.01) | ||
| U.S. Cl. 310—365 [310/311; 310/316] | 19 Claims |
| 1. A piezoelectric vibrator comprising:
a piezoelectric element including:
a first piezoelectric element layer having a bisected top electrode formed thereon;
a second piezoelectric element provided under the first piezoelectric element layer and having an internal ground electrode
formed thereon; and
a third piezoelectric element provided under the second piezoelectric element layer, the third piezoelectric element having
an internal bisected electrode symmetrical with the top electrode with respect to a stack plane, and a bottom electrode formed
in a plane opposite to the plane where the internal electrode is formed;
a side electrode including:
first and second side electrodes for electrically connecting electrode patterns formed in a diagonal direction among the electrode
patterns formed in the first and third piezoelectric element layers of the piezoelectric element; and
a third side electrode for electrically connecting the internal ground electrode of the second piezoelectric element layer
to the bottom electrode of the third piezoelectric element layer; and
a power transmission member formed in one side of the piezoelectric element to transmit vibration generated from the piezoelectric
element to the outside.
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