Patent ID: 8869362
Filing Date: 2014-10-28
Classification: B41J,H01L,Y10T

Abstract:
1. A method of forming an array of piezoelectric actuators on a common membrane, comprising the steps of: preparing a piezoelectric comb-shaped structure having an array of islands that are integrally connected by a continuous top portion and that are to form piezoelectric layers of the actuators, said islands having an electrode at a bottom side, attaching the comb-shaped structure with the electrode at the bottom side, to a surface of the membrane, removing the continuous top portion of the comb-shaped structure, thereby separating the actuators from one another, and forming top electrodes on the top surfaces of the piezoelectric layers of the actuators, wherein the membrane is initially configured as a thick carrier plate comprising a membrane part attached to a bulk of the carrier plate and, after the comb-shaped structure has been attached, the membrane is brought to a desired uniform thickness by removing material of the bulk of the carrier plate from the side opposite to the actuators with the membrane part remained so as to obtain a continuous flat bottom surface of the membrane part extending over a plurality of actuators.