Direct bonding process
    3.
    发明申请

    公开(公告)号:US20190214258A1

    公开(公告)日:2019-07-11

    申请号:US16207828

    申请日:2018-12-03

    摘要: A process for attaching a first substrate to a second substrate by direct bonding includes the successive steps of: a) providing the first and second substrates, each comprising a first surface and an opposite second surface, b) bonding the first substrate to the second substrate by direct bonding between the first surfaces of the first and second substrates, step b) being carried out under a first gaseous atmosphere having a first relative humidity level denoted by φ1, and c) applying a thermal annealing treatment to the bonded first and second substrates at a thermal annealing temperature of between 20° C. and 700° C., step c) being carried out under a second gaseous atmosphere having a second humidity level denoted by φ2, satisfying φ2≥φ1.