Piezoelectric transducer, manufacturing process pertaining thereto, and resonant ultrasound spectroscopy device
AssigneesSorbonne Universite, Centre National De La Recherche Scientifique, Inserm (Institut National De La Sante Et De La Recherche Medicale)
InventorsPascal Dargent, Quentin Grimal
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Abstract
Disclosed is a piezoelectric transducer of the type including a stack of a contact piece, a piezoelectric pellet and a support of very great stiffness. Specifically, the contact piece forms tips, the respective apex of which constitutes contact points that are spatially isolated from one another. Also disclosed is a process for the manufacture of such a contact piece as well as a resonant ultrasound spectroscopy device including one or more of such piezoelectric transducers.
Claims21
A piezoelectric transducer (9, 9a, 9b) comprising:
- a piezoelectric pellet (2);
- and
- a contact piece (1) stacked on the piezoelectric pellet (2),
- wherein the contact piece (1) forms tips (10),
- the respective apex of the tips (10) constituting contact points (11) spatially isolated from one another, and
- wherein the contact piece is arranged in order to establish a mechanical contact, by at least one of the contact points (11), with a sample (E1) to be analyzed,
- wherein the contact points (11) are distributed over a convex surface (S1).
A piezoelectric transducer (9, 9a, 9b) comprising:
- a piezoelectric pellet (2);
- and
- a contact piece (1) stacked on the piezoelectric pellet (2),
- wherein the contact piece (1) forms tips (10),
- the respective apex of the tips (10) constituting contact points (11) spatially isolated from one another,
- wherein the contact piece is arranged in order to establish a mechanical contact, by at least one of the contact points (11), with a sample (E1) to be analyzed, and
- wherein the contact points (11) are distributed such that no geometrical plane passes less than 0.5 μm from more than three of said contact points.
A process for the manufacture of a contact piece (1) for a piezoelectric transducer (9, 9a, 9b) comprising a piezoelectric pellet (2) and a contact piece (1) stacked on the piezoelectric pellet (2), wherein the contact piece (1) forms tips (10), the respective apex of the tips (10) constituting contact points (11) spatially isolated from one another, and wherein the contact piece is arranged in order to establish a mechanical contact, by at least one of the contact points (11), with a sample (E1) to be analyzed, the process comprising a step of machining the tips (10) by wire electrical discharge machining.
Dependencies are inferred from the claim text.