PIEZOELECTRIC STRUCTURES

WIPO Patent Application WO2003028122

A3

An equivalent to the spatial separation either side of a nominal median plane that is inherent in a bimorph (with one piezoelectric layer on one side, and the second on the other side of the plane)is attained by structurally shaping the cross-section of a simple, single piezoelectric layer (11) such that it has a multiplicity of piezoelectric portions arranged in two generally-planar groups one either side of a median plane, so that any dimension change undergone by a portion on one side of that plane will tend to bend the whole device in the opposite direction to the same sense dimension change undergone by a portion on the other side of that plane. The simple, single layer acts as though it were a bimorph if elongate and beam-like, bending along its length, one end moving up/down, or back/forth, relative to the other but with any need for an internal, electrode.

TOPLISS RICHARD (GB)
LIVINGSTONE DAVID (GB)
MATHESON ANDREW (US)
MCKEVITT GARETH (GB)
SHEPHERD MARK RICHARD (GB)
HOOLEY ANTHONY (GB)

PCT/GB2002/004370

February 12, 2004

September 26, 2002

Click for automatic bibliography generation  

1 LTD (GB)
TOPLISS RICHARD (GB)
LIVINGSTONE DAVID (GB)
MATHESON ANDREW (US)
MCKEVITT GARETH (GB)
SHEPHERD MARK RICHARD (GB)
HOOLEY ANTHONY (GB)

H01L41/09; H01L41/187; H01L41/22; H01L41/333; H02N2/00; (IPC1-7): H01L41/09

WO2001047041A2

2001-06-28

JPS5612697A	1981-02-07
US3816774A	1974-06-11
US4028566A	1977-06-07
US5633554A	1997-05-27

J K LEE & M W CSONTOS: "Multilayered piezoelectric flexure device (JK Lee & MW Csontos)", RESEARCH DISCLOSURE, KENNETH MASON PUBLICATIONS, HAMPSHIRE, GB, VOL. 187, NR. 15, ISSN: 0374-4353, XP007106893

View/Download PDF      PDF Help

Previous Patent: PIEZOELECTRIC MOTOR COMPRISING A PIEZOELECTRIC ELEMENT ARRANGED IN A RESONATOR

Next Patent: MATRIX TYPE PIEZOELECTRIC&sol ELECTROSTRICTIVE DEVICE AND ITS MANUFACTURING METHOD