(19)

(11)

EP 4 264 693 A1

(12)

(43) Date of publication: 25.10.2023 Bulletin 2023/43 (21) Application number: 21840905.0 (22) Date of filing: 17.12.2021

(51) International Patent Classification (IPC):  H01L 43/14(2006.01) H01L 21/336(2006.01) H01L 43/06(2006.01) H01L 29/16(2006.01) (52) Cooperative Patent Classification (CPC): H01L 29/66045; H01L 29/1606; G01R 33/072; G01R 33/0094; H10N 52/80; H10N 52/01; H10N 52/101 (86) International application number: PCT/EP2021/086642 (87) International publication number: WO 2022/129606 (23.06.2022 Gazette 2022/25)

(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: 18.12.2020 GB 202020131 28.05.2021 GB 202107674 23.06.2021 GB 202109011 (71) Applicant: Paragraf Limited Somersham, Cambridgeshire PE28 3EB (GB)	(72) Inventors: BAINES, Rosie Somersham, Cambridgeshire PE28 3EB (GB) LEE, Lok Yi Somersham, Cambridgeshire PE28 3EB (GB) GLASS, Hugh Somersham, Cambridgeshire PE28 3EB (GB) (74) Representative: Boult Wade Tennant LLP  Salisbury Square House 8 Salisbury Square London EC4Y 8AP London EC4Y 8AP (GB)