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11.发明公开
公开(公告)号：EP4239305A1
公开(公告)日：2023-09-06
申请号：EP23157007.8
申请日：2023-02-16
Applicant: STMicroelectronics S.r.l.
Inventor： DUQI, Enri , FEDELI, Patrick , MANCA, Nicolò , ADORNO, Silvia
Abstract: Method (50) for determining a first (P 1 ') and a second (P 2 ') calibrated value of atmospheric pressure, performed by an electronic apparatus (10) comprising a fixed device (14) and a first (12a) and a second (12b) movable device comprising respectively a first (16a) and a second (16b) movable barometer. The method (50) comprises: determining (S10) whether the movable devices are being inductively charged by the fixed device; if so, acquiring (S12) respective measured values of atmospheric pressure (P 1 , P 2 ) through the movable barometers (16a, 16b), and a reference value of atmospheric pressure (P rif ) in a common reference point of the electronic apparatus (10), the movable barometers being at respective predefined height differences (Δh) with respect to the common reference point; calculating (S14) respective pressure differences (ΔP 1 , ΔP 2 ) as a function of the measured values of atmospheric pressure and of the reference value of atmospheric pressure; and when the movable devices are not being charged, acquiring (S20) new measured values of atmospheric pressure through the movable barometers, and determining (S20) the respective calibrated values of atmospheric pressure as a function of the new measured values of atmospheric pressure and of the pressure differences.
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公开(公告)号：EP3834952A1
公开(公告)日：2021-06-16
申请号：EP20210384.2
申请日：2020-11-27
Applicant: STMicroelectronics S.r.l.
Inventor： ADORNO, Silvia , CARMINATI, Roberto
Abstract: A micromachined ultrasonic transducer ( 100 ) is proposed. The micromachined ultrasonic transducer ( 100 ) comprises a membrane element ( 115 ) for transmitting / receiving ultrasonic waves, during the transmission/reception of ultrasonic waves the membrane element ( 115 ) oscillating, about an equilibrium position, at a respective resonance frequency. The equilibrium position of the membrane element ( 115 ) is variable according to a biasing electric signal applied to the membrane element ( 115 ). The micromachined ultrasonic transducer ( 100 ) further comprises a cap structure ( 125 ) extending above the membrane element ( 115 ); said cap structure ( 125 ) identifies, between it and said membrane element ( 115 ), a cavity ( 130 ) whose volume is variable according to the equilibrium position of the membrane element ( 115 ). Said cap structure ( 125 ) comprises an opening ( 125 A ) for inputting / outputting the ultrasonic waves into/from the cavity ( 130 ). Said cap structure ( 125 ) and said membrane element ( 115 ) act as tunable Helmholtz resonator, whereby said resonance frequency is variable according to the volume of the cavity ( 130 ).
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公开(公告)号：EP3457709A1
公开(公告)日：2019-03-20
申请号：EP18194622.9
申请日：2018-09-14
Applicant: STMicroelectronics S.r.l.
Inventor： PERLETTI, Matteo , VERCESI, Federico , ADORNO, Silvia , ALLEGATO, Giorgio
Abstract: A method for manufacturing a filtering module (52) comprising the steps of: forming a multilayer body comprising a filter layer (104; 208; 308) of semiconductor material and having a thickness of less than 10 pm, a first structural layer (101; 212; 312) coupled to a first side of the filter layer, and a second structural layer (110; 201; 301) 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 (58), 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 (56) designed to inhibit passage of contaminating particles.
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