Method for manufacturing semiconductor device
Abstract
Abstract Translated from Japanese (57)【要約】 【目的】リセス幅を広げたショットキ障壁ゲート型FE Tを形成し、ゲート耐圧を向上させ、且つ、ゲート・ド レイン間容量の低減により高周波特性を向上させる。 【構成】n型GaAs層3の上に形成した酸化シリコン 膜4に設けた開口部に露出したn型GaAs層3の面に 不活性ガスでプラズマ照射しダメージ層6を形成した 後、開口部の側壁に側壁スペーサを形成し酸化シリコン 膜および側壁スペーサをマスクとしてダメージ層6をn 型GaAs層3を等方性エッチングし浅いリセス深さで ありながらリセス幅の広いリセス8を形成する。 (57) [Abstract] [Purpose] Schottky barrier gate type FE with wider recess width By forming T, the gate breakdown voltage is improved, and the high frequency characteristics are improved by reducing the gate-drain capacitance. [Structure] The surface of the n-type GaAs layer 3 exposed in the opening provided in the silicon oxide film 4 formed on the n-type GaAs layer 3 is plasma-irradiated with an inert gas to form a damage layer 6, and then the opening is formed. Side wall spacers are formed on the side walls of the silicon oxide film and the side wall spacers are used as masks to form the damage layer 6 in The type GaAs layer 3 is isotropically etched to form a recess 8 having a shallow recess depth but a wide recess width.
Inventors
- 👤 Yoichi Oikawa
- 👤 洋一 及川
Bibliographic Details
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