(19)

(11)

EP 4 824 858 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 24828971.2 (22) Date of filing: 11.12.2024

(51) International Patent Classification (IPC):  H01L 21/02(2006.01) H01L 21/762(2006.01) (52) Cooperative Patent Classification (CPC): H10D 30/66; H10D 62/8503; H10D 30/475; H10D 64/256; H10D 64/111; H10D 62/357; H10D 12/441; H10D 62/393; H10D 62/213; H10D 12/417; H10D 12/032; H10P 90/00; H10P 90/1916; H10W 10/181; H10W 20/20 (86) International application number: PCT/US2024/059461 (87) International publication number: WO 2025/128628 (19.06.2025 Gazette 2025/25)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 12.12.2023 US 202318537427 (71) Applicant: Wolfspeed, Inc. Durham, NC 27703 (US)	(72) Inventors: BARKLEY, Adam Benjamin Durham, North Carolina 27703 (US) HARDIN, Craig William Durham, North Carolina 27703 (US) (74) Representative: Boult Wade Tennant LLP  Salisbury Square House 8 Salisbury Square London EC4Y 8AP London EC4Y 8AP (GB)