公开(公告)号：US20220123105A1

公开(公告)日：2022-04-21

申请号：US17494475

申请日：2021-10-05

Applicant: STMicroelectronics S.r.l.

Inventor： Fabrizio CERINI ,  Silvia ADORNO ,  Dario PACI ,  Marco SALINA

IPC: H01L49/02 ,  H01L23/522

Abstract: An electrode structure includes a pad of conductive material, and a conductive strip having a first end physically and electrically coupled to the pad. The pad includes an annular element internally defining a through opening. The first end of the conductive strip is physically and electrically coupled to the annular element by a transition region so that, when the conductive strip undergoes expansion by the thermal effect, a stress spreads from the conductive strip to the annular element by the transition region.

公开(公告)号：US20200382876A1

公开(公告)日：2020-12-03

申请号：US16882343

申请日：2020-05-22

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Fabrizio CERINI ,  Silvia ADORNO

IPC: H04R17/02 ,  H01L41/09 ,  B81B3/00 ,  B81C1/00 ,  H01L41/113

Abstract: A piezoelectric microelectromechanical acoustic transducer, having a semiconductor substrate with a frame portion and a through cavity defined internally by the frame portion; an active membrane, suspended above the through cavity and anchored, at a peripheral portion thereof, to the frame portion of the substrate by an anchorage structure, a plurality of piezoelectric sensing elements carried by a front surface of the active membrane so as to detect mechanical stresses of the active membrane; a passive membrane, suspended above the through cavity, underneath the active membrane, interposed between the through cavity and a rear surface of the active membrane; and a pillar element, which fixedly couples, and is centrally interposed between, the active membrane and the passive membrane. A ventilation hole passes through the entire active membrane, the passive membrane and the pillar element to set the through cavity in fluidic communication with the front surface of the active membrane.

公开(公告)号：US20200092659A1

公开(公告)日：2020-03-19

申请号：US16693003

申请日：2019-11-22

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Matteo PERLETTI ,  Federico VERCESI ,  Silvia ADORNO ,  Giorgio ALLEGATO

IPC: H04R19/04 ,  B81C1/00 ,  H04R31/00 ,  H04R1/08 ,  B81B7/00 ,  H04R19/00 ,  H04R1/28

Abstract: A method for manufacturing a filtering module comprising the steps of: forming a multilayer body comprising a filter layer of semiconductor material and having a thickness of less than 10 μm, a first structural layer coupled to a first side of the filter layer, and a second structural layer coupled to a second side, opposite to the first side, of the filter layer; forming a recess in the first structural layer, which extends throughout its thickness; removing selective portions, exposed through the recess, of the filter layer to form a plurality of openings, which extend throughout the thickness of the filter layer; and completely removing the second structural layer to connect fluidically the first and second sides of the filter layer, thus forming a filtering membrane designed to inhibit passage of contaminating particles.

公开(公告)号：US20190327562A1

公开(公告)日：2019-10-24

申请号：US16389833

申请日：2019-04-19

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Fabrizio CERINI ,  Silvia ADORNO ,  Federico VERCESI

IPC: H04R17/02 ,  H01L41/113 ,  B81B3/00 ,  B81C1/00

Abstract: A piezoelectric MEMS transducer formed in a body of semiconductor material, which has a central axis and a peripheral area and comprises a plurality of beams, transverse to the central axis and having a first end, coupled to the peripheral area of the body, and a second end, facing the central axis; a membrane, transverse to the central axis and arranged underneath the plurality of beams; and a pillar, parallel to the central axis and rigid with the second end of the beams and to the membrane. The MEMS transducer further comprises a plurality of piezoelectric sensing elements arranged on the plurality of beams.