Global Patent Index - EP 1016145 A1

EP 1016145 A1 2000-07-05 - MULTILAYER PIEZOELECTRIC CERAMIC TRANSDUCER AND FABRICATION METHOD

Title (en)

MULTILAYER PIEZOELECTRIC CERAMIC TRANSDUCER AND FABRICATION METHOD

Title (de)

PIEZOELEKTRISCHE KERAMISCHE MEHRSCHICHTMANDLER UND VERFAHREN ZU DEREN HERSTELLUNG

Title (fr)

TRANSDUCTEUR CERAMIQUE PIEZO-ELECTRIQUE A MULTIPLES COUCHES ET PROCEDE DE FABRICATION

Publication

EP 1016145 A1 (EN)

Application

EP 97939345 A

Priority

  • US 9713025 W
  • US 68649696 A

Abstract (en)

[origin: WO9805080A1] A method of fabricating a multilayer piezoelectric transducer. The method involves net-shape molding from a mixture of a piezoelectric or electrostrictive ceramic powder material and an organic binder a unitary piezoelectric or electrostrictive ceramic body. The body (21) includes a top, four sides normal to the top, and a base interconnecting the sides. First and second cavities are molded into at least one side to divide the ceramic body into a plurality of ceramic layers disposed generally parallel to the top. The first cavities alternate with the second cavities in the ceramic body. Each ceramic layer except an uppermost and a lowermost ceramic layer is joined at one edge to one ceramic layer adjacent thereto by a first ceramic bridge and at the same or a different edge to another ceramic layer adjacent thereto by a second ceramic bridge.

IPC 1-7 (main, further and additional classification)

H01L 41/08

IPC 8 full level (invention and additional information)

H01L 41/083 (2006.01); H01L 41/257 (2013.01); H01L 41/27 (2013.01); H01L 41/293 (2013.01); H01L 41/297 (2013.01); H01L 41/43 (2013.01)

CPC (invention and additional information)

H01L 41/083 (2013.01); H01L 41/257 (2013.01); H01L 41/27 (2013.01); H01L 41/293 (2013.01); H01L 41/297 (2013.01); H01L 41/43 (2013.01)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9805080 A1 19980205; EP 1016145 A1 20000705; EP 1016145 A4 20020508

INPADOC legal status


2003-08-20 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030201

2002-05-08 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20020321

2002-05-08 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2002-05-08 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- Free Format Text: 7H 01L 41/24 A, 7H 01L 41/083 B, 7B 28B 1/24 B

2000-07-05 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19990527

2000-07-05 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE