(19)

(11)

EP 4 427 274 A1

(12)

(43) Date of publication: 11.09.2024 Bulletin 2024/37 (21) Application number: 21962863.3 (22) Date of filing: 04.11.2021

(51) International Patent Classification (IPC):  H01L 31/0236(2006.01) H01L 31/0216(2014.01) H01L 31/18(2006.01) (52) Cooperative Patent Classification (CPC): Y02B 10/10; H01L 31/048; H01L 31/0445; H01L 31/0201; H01L 31/02; H02S 20/26 (86) International application number: PCT/CN2021/128594 (87) International publication number: WO 2023/077346 (11.05.2023 Gazette 2023/19)

(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 (71) Applicants: Triumph Science & Technology Group Co., Ltd Beijing 100036 (CN) CNBM RESEARCH INSTITUTE FOR ADVANCED GLASS MATERIALS GROUP CO., LTD. Bengbu, Anhui 233010 (CN)

(72) Inventor: SHEN, Yilei 81739 Munich (DE) (74) Representative: Bardehle Pagenberg Partnerschaft mbB Patentanwälte Rechtsanwälte  Prinzregentenplatz 7 81675 München 81675 München (DE)