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(11)

EP 4 078 686 A1

(12)

(43) Date of publication: 26.10.2022 Bulletin 2022/43 (21) Application number: 20841784.0 (22) Date of filing: 18.12.2020

(51) International Patent Classification (IPC):  H01L 31/042(2014.01) H01L 31/05(2014.01) (52) Cooperative Patent Classification (CPC): H01L 31/042; H01L 31/0504; H01L 31/044; Y02E 10/50 (86) International application number: PCT/IT2020/000085 (87) International publication number: WO 2021/124363 (24.06.2021 Gazette 2021/25)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 18.12.2019 IT 201900024616 (71) Applicant: S.T.A.R. Industry Solution Societa' A Responsabilita' Limitata Semplificata 61025 Montelabbate Pesaro e Urbino (IT)

(72) Inventor: CHIACCHIERONI, Alfredo 0501O SAN VENANZO TERNI (IT) (74) Representative: Baldi, Claudio  Ing. Claudio Baldi S.r.l. Viale Cavallotti, 13 60035 Jesi (Ancona) 60035 Jesi (Ancona) (IT)