SEMICONDUCTOR DEVICE INCLUDING A TRENCH STRUCURE

    公开(公告)号:EP4064364A1

    公开(公告)日:2022-09-28

    申请号:EP21164244.2

    申请日:2021-03-23

    摘要: A semiconductor device is proposed. An example of a semiconductor device (100) includes a semiconductor body (102) having a first main surface (104). A trench structure (106) extends into the semiconductor body (102) from the first main surface (104). The trench structure (106) includes a trench electrode structure (108) and a trench dielectric structure (110). The trench dielectric structure (110) includes a gate dielectric (1101) in an upper part (110a) of the trench dielectric structure (110) and a gap (1102) in a lower part (110b) of the trench dielectric structure (110). The semiconductor device (100) further includes a body region (112) adjoining the gate dielectric (1101) at a sidewall (114) of the trench structure (106) in the upper part (110a) of the trench dielectric structure (110). The gate dielectric (1101) extends deeper into the semiconductor body (102) along the sidewall (114) than the body region (112).