Patent ID: 6922005

Claim:
A piezoceramic multilayer actuator comprising alternating internal electrodes that have contact surfaces and lead to the surface of the actuator having inactive regions assigned to them, wherein internal electrodes of the same polarity are connected by their contact surfaces to form a parallel circuit to corresponding external electrodes, wherein said external electrodes are arranged on opposing sides of the actuator, wherein contact surfaces, and therefore the inactive regions assigned to them of one or a predetermined number of internal electrodes of the same polarity, arranged above one another in the same direction, are arranged offset to the another by a predetermined angle of the value a with respect to the contact surfaces, and therefore the inactive regions assigned to these, of the preceding internal electrode or a predetermined number of preceding same-internal electrodes of the same alignment; wherein α is calculated according to the formula α={( h/d )·arcsin( L/R )} wherein h is the predetermined height; d is the total thickness of the piezoceramic layer, the green film and the electrode layer; L is the length of a secant on a cross-sectional surface of the inner electrode; and R is the radius of the multilayer actuator.