SHORT GATE-LENGTH HIGH ELECTRON-MOBILITY TRANSISTORS WITH ASYMMETRIC RECESS AND SELF-ALIGNED OHMIC ELECTRODES
    6.
    发明申请
    SHORT GATE-LENGTH HIGH ELECTRON-MOBILITY TRANSISTORS WITH ASYMMETRIC RECESS AND SELF-ALIGNED OHMIC ELECTRODES 审中-公开
    具有不对称记忆和自对准OHMIC电极的长度高的电子移动晶体管

    公开(公告)号:US20130295757A1

    公开(公告)日:2013-11-07

    申请号:US13875385

    申请日:2013-05-02

    Abstract: A method for fabricating InP-based high electron-mobility transistors (HEMTs) and GaAs-based metamorphic electron-mobility transistors (MHEMTs) by utilizing asymmetrically recessed Γ-gates and self-aligned ohmic electrodes is disclosed. The fabrication starts with mesa isolation, followed by gate recess and gate metal deposition, in which the gate foot is placed asymmetrically in the recess groove, with the offset towards the source. It is important to use Γ-gates as the shadow mask for ohmic metal deposition, because it allows a source-gate spacing as small as 0.1 micron, greatly reducing the critical source resistance, and it retains a relatively large gate-drain spacing, enabling a decent breakdown voltage when coupled with the asymmetric gate recess. It is also critical to maintain a large stem height of the Γ-gates to assure a sufficient gap between the top of the gates and the ohmic metal after its deposition to reduce the parasitic capacitance. The uniqueness of this technology would best fit the applications that require low voltage and/or low DC power consumption.

    Abstract translation: 公开了一种通过利用非对称凹入的伽马栅极和自对准欧姆电极制造基于InP的高电子迁移率晶体管(HEMT)和GaAs基变质电子迁移率晶体管(MHEMT)的方法。 制造从台面隔离开始,随后是栅极凹槽和栅极金属沉积,其中栅极脚不对称地放置在凹槽中,偏移到源极。 重要的是使用伽马门作为欧姆金属沉积的阴影掩模,因为它允许源极间距小至0.1微米,大大降低了临界源极电阻,并且保持了较大的栅极 - 漏极间隔,使得 当与非对称栅极凹槽耦合时,具有相当的击穿电压。 保持伽马门的大的杆高度也是至关重要的,以确保栅极顶部和其沉积后的欧姆金属之间的足够间隙以减小寄生电容。 该技术的独特性将最适合需要低电压和/或低直流功耗的应用。

Patent Agency Ranking