JP2022136004A - 半導体素子とその製造方法 - Google Patents
半導体素子とその製造方法 Download PDFInfo
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- JP2022136004A JP2022136004A JP2022031369A JP2022031369A JP2022136004A JP 2022136004 A JP2022136004 A JP 2022136004A JP 2022031369 A JP2022031369 A JP 2022031369A JP 2022031369 A JP2022031369 A JP 2022031369A JP 2022136004 A JP2022136004 A JP 2022136004A
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Abstract
Description
18、90:トランジスタ素子
19、20、90A、90B:トランジスタ構造
100、300:基板
102:オーバーレイ層
103:隔離構造
104、104’、104”:伝熱層
104A:パターン化伝熱層
106、106’、106”、306、306’、306”:チャンネル材料層
106A:パターン化チャンネル材料層
108:フォトレジストパターン
110、310:ソース及びドレイン端子
112:誘電層
112A、112’、112”、309:ゲート誘電層
120、320:ゲート構造
130:層間誘電(ILD)層
142、144:コンタクト
302:材料層
304、304’、304”:第1の伝熱層
308、308’、308”:第2の伝熱層
C1、C2:キャリア
CR:チャンネル領域
DR:素子領域
I-I’、II-II’:横断面線
O:開口
S1:トレンチ開口
S2:コンタクト開口
SF:ストリップフィンパターン
WP:ワイドストリップパターン
Claims (20)
- 半導体素子であって、
基板上方に配置された第1の伝熱層と、
第1の表面と、前記第1の表面の反対側の第2の表面とを有し、前記第1の表面が前記第1の伝熱層に接触した状態で、前記第1の伝熱層上に配置されるチャンネル材料層と、
前記チャンネル材料層の上方に配置されたゲート構造と、
前記チャンネル材料層に接触し、前記ゲート構造の両側に位置するソース及びドレイン端子と、を備える半導体素子。 - 前記ソース及びドレイン端子は、前記第1の伝熱層上に位置し、前記チャンネル材料層を貫通する請求項1に記載の半導体素子。
- 前記チャンネル材料層上に配置され、前記チャンネル材料層の前記第2の表面と接触した第2の伝熱層をさらに備え、前記ソース及びドレイン端子は、前記第2の伝熱層と前記チャンネル材料層とを貫通する請求項2に記載の半導体素子。
- 前記ソース及びドレイン端子は、前記チャンネル材料層上に直接位置する請求項1に記載の半導体素子。
- 前記チャンネル材料層上に配置され、前記チャンネル材料層の前記第2の表面に接触する第2の伝熱層をさらに備え、前記ソース及びドレイン端子は、前記第2の伝熱層を貫通する請求項4に記載の半導体素子。
- 前記第1の伝熱層と前記基板との間に配された材料層をさらに備え、前記材料層は、フィンパターンを有し、前記第1の伝熱層及び前記チャンネル材料層は、前記フィンパターンの側壁及び上面を被覆する請求項1に記載の半導体素子。
- 前記チャンネル材料層の材料は、低次元材料を含み、前記第1の伝熱層の材料は、2次元(2D)材料を含む請求項1に記載の半導体素子。
- 前記チャンネル材料層の材料は、半導電性2D材料を含み、前記第1の伝熱層の材料は、絶縁性2D材料を含む請求項1に記載の半導体素子。
- 前記ゲート構造と前記チャンネル材料層との間に位置するゲート誘電層をさらに備える請求項1に記載の半導体素子。
- 半導体素子であって、
窒化ホウ素を含む伝熱層と、
前記伝熱層上に配置され、低次元材料を含むチャンネル層と、
前記チャンネル層上方に配置されるゲート構造と、
前記ゲート構造と前記チャンネル層との間に配置されるゲート誘電層と、
前記ゲート構造の隣に配置され、前記チャンネル層と接触するソース及びドレインと、を備える半導体素子。 - 前記チャンネル層の前記低次元材料は、MX2と示される遷移金属ジカルコゲナイド(TMD)を含み、Mは、モリブデン(Mo)又はタングステン(W)であり、Xは、硫黄(S)、セレニウム(Se)、又はテルリウム(Te)である請求項10に記載の半導体素子。
- 前記チャンネル層の前記低次元材料は、MoS2、WS2、又はWSe2を含む請求項11に記載の半導体素子。
- 前記チャンネル層上、且つ、前記ゲート誘電層と前記チャンネル層との間に配された追加伝熱層をさらに備え、前記チャンネル層に接触した前記ソース及びドレインは、前記チャンネル層上に配置され、前記追加伝熱層を貫通する請求項10に記載の半導体素子。
- 前記チャンネル層上、且つ、前記ゲート誘電層と前記チャンネル層との間に配された追加伝熱層をさらに備え、前記チャンネル層に接触した前記ソース及びドレインは、前記伝熱層上に配置され、前記追加伝熱層と前記チャンネル層とを貫通する請求項10に記載の半導体素子。
- 前記チャンネル層に接触する前記ソース及びドレインは、前記伝熱層上に配置され、前記チャンネル層を貫通する請求項10に記載の半導体素子。
- 前記伝熱層及び前記チャンネル層の下方に配置された材料層をさらに備え、前記材料層は、フィンパターンを有し、前記伝熱層及び前記チャンネル層は、前記フィンパターンの側壁及び上面を被覆する請求項10に記載の半導体素子。
- 半導体素子の製造方法であって、
基板上方に伝熱層を形成することと、
前記伝熱層上にチャンネル材料層を形成することと、
前記チャンネル材料層上に誘電層を形成することと、
前記誘電層をパターニングして、前記誘電層内に開口を形成することと、
前記開口内にソース及びドレイン端子を形成することと、
前記誘電層上方にゲート構造を形成することと、を備える方法。 - 前記伝熱層を形成することは、化学気相蒸着プロセスを実施して、窒化ホウ素の多層を形成することを含む請求項17に記載の半導体素子の製造方法。
- 前記チャンネル材料層を形成することは、MoS2、WS2、又はWSe2から選択された遷移金属ジカルコゲナイド(TMD)の少なくとも1つの単層を選択的に形成する化学気相蒸着プロセスを実施することを含む請求項17に記載の半導体素子の製造方法。
- 前記開口内に形成された前記ソース及びドレイン端子は、前記チャンネル材料層と直接接触する請求項17に記載の半導体素子の製造方法。
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US12062696B2 (en) | 2024-08-13 |
US20240363688A1 (en) | 2024-10-31 |
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