Patent ID: 8287943

Claim:
A method for manufacturing a suspended piezoelectric microcomponent which comprises a lower electrode and an upper electrode, said method comprising: 1) depositing on an alumina substrate, a first temporary layer of an ink (P) formed by a thermosetting epoxy resin containing SrCO 3 as a mineral filler, and consolidating said layer; 2) depositing on both sides of the first temporary ink layer (P), a first gold ink layer (M 1 ) in the form of two separate areas, and partially consolidating said layer (M 1 ); 3) depositing a second gold ink layer (Mâ€² 1 ) according to a pattern representing the shape of the lower electrode, only above the first temporary ink layer (P) and so that said second gold ink layer (Mâ€² 1 ) touches only a first of said two areas forming the first gold ink layer (M 1 ), and partially consolidating said layer (Mâ€² 1 ); 4) depositing, only on the portion of the second gold ink layer (Mâ€² 1 ) representing the lower electrode, a piezoelectric ink layer (M 2 ), said piezoelectric layer containing an organic binder and a powder consisting of PbZr 0.5 Ti 0.5 O 3 and PbO/PbF 2 eutectic, and partially consolidating said layer (M 2 ); 5) depositing a second temporary ink layer (Pâ€²) formed by a thermosetting epoxy resin containing SrCO 3 as a mineral filler, in order to electrically insulate both electrodes, said second temporary ink layer being directly positioned on a free surface of the first temporary ink layer (P) between the second gold ink layer (Mâ€² 1 ) and the second of said two areas forming the first gold ink layer (M 1 ), and consolidating said layer (Pâ€²); 6) depositing a third gold ink layer (Mâ€³ 1 ), said third layer being contained over a portion of the fourth ink layer (M 2 ) so as to touch only the second of said two areas forming the first gold ink layer (M 1 ), the third gold ink layer (Mâ€³ 1 ) representing the shape of the upper electrode, and carrying out total consolidation, said total consolidation being carried out by a heat treatment by baking between 500Â° C. and 1200Â° C.; and 7) totally removing the material of the two temporary ink layers (P, Pâ€²) after said total consolidation, said total removal being carried out by immersion of the sample in water or acidic medium, wherein the inks (M 1 , Mâ€² 1 , Mâ€³ 1 , M 2 , P and Pâ€²) are deposited by screen printing, wherein the consolidation of ink layers P and Pâ€² are each carried out at a temperature between 120Â° C. and 220Â° C. for a period of 20 minutes to 2 hours, and wherein the partial consolidation of ink layers M 1 , Mâ€² 1 , and M 2 are each carried out at a temperature of between 120Â° C. and 150Â° C. for a period of 10 minutes to 20 minutes.