US 12,144,258 B2
Suspension design with improved microactuator sensitivity and microactuator configurations
Kuen Chee Ee, Chino, CA (US)
Assigned to Magnecomp Corporation, Murrieta, CA (US)
Filed by Magnecomp Corporation, Murrieta, CA (US)
Filed on Feb. 4, 2021, as Appl. No. 17/168,052.
Claims priority of provisional application 62/971,606, filed on Feb. 7, 2020.
Prior Publication US 2021/0249585 A1, Aug. 12, 2021
Int. Cl. H01L 41/09 (2006.01); G11B 5/48 (2006.01); H10N 30/20 (2023.01); H10N 30/50 (2023.01); H10N 30/853 (2023.01); H10N 30/87 (2023.01)
CPC H10N 30/2042 (2023.02) [G11B 5/484 (2013.01); H10N 30/50 (2023.02); H10N 30/8554 (2023.02); H10N 30/872 (2023.02)] 20 Claims
OG exemplary drawing
 
1. An actuator assembly having a fixed-end and a hinged-end, the assembly comprising:
a first side electrode at the hinged-end;
a second side electrode at the fixed-end;
a first piezoelectric (PZT) layer including a top surface and a bottom surface;
a first electrode at least partially disposed on the bottom surface of the first PZT layer, wherein a disconnected portion of the first electrode is separate from the first electrode and disposed along a portion of the bottom surface of the first PZT layer and configured to be electrically connected to an electrically conductive adhesive at the fixed-end via the second side electrode;
a second PZT layer including a top surface and a bottom surface disposed over the top surface of the first PZT layer;
a second electrode at least partially disposed on the bottom surface of the second PZT layer and at least partially disposed on the top surface of the first PZT layer, wherein the second electrode is connected to the second side electrode at the fixed-end;
a third PZT layer including a top surface and a bottom surface disposed over the top surface of the second PZT layer;
a third electrode at least partially disposed on the bottom surface of the third PZT layer and at least partially disposed on the top surface of the second PZT layer, wherein the third electrode is connected to the first side electrode at the hinged-end; and
a fourth electrode at least partially disposed on the top surface of the third PZT layer, wherein the fourth electrode is connected to the second side electrode at the fixed-end, wherein a disconnected portion of the fourth electrode is separate from the fourth electrode and disposed along a portion of the top surface of the third PZT layer and configured to be electrically connected to an electrically conductive adhesive at the hinged-end via the first side electrode, and wherein a length of the disconnect portion of the fourth electrode is less than a length of the disconnect portion of the first electrode.