JP2006237302A - 半導体装置および半導体装置の製造方法 - Google Patents
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66568—Lateral single gate silicon transistors
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Abstract
【解決手段】半導体基板101上にゲート絶縁膜102を介して形成されたゲート電極103の側面にサイドウォールスペーサー104が形成され、半導体基板101上に堆積されたエクステンション領域109、110と、この上に形成されたソース・ドレイン112、113とを備えた半導体装置1において、サイドウォールスペーサー104を形成した際に削られた半導体基板101部分を埋め込むように第1エピタキシャル層107、108を形成し、第1エピタキシャル層上にこれとは逆導電型の第2エピタキシャル層からなるエクステンション領域109、110が形成されたものである。
【選択図】図1
Description
Claims (10)
- 半導体基板上にゲート絶縁膜を介して形成されたゲート電極と、
前記ゲート電極の側面に形成されたサイドウォールスペーサーと、
前記ゲート電極の両側の前記半導体基板上に堆積されたエクステンション領域と、
前記エクステンション領域上に形成されたソース・ドレイン領域とを備えた半導体装置において、
前記サイドウォールスペーサーを形成した際に削られた前記半導体基板部分を埋め込むように形成した第1エピタキシャル層と、
前記第1エピタキシャル層とは逆導電型のエピタキシャル層からなるもので前記第1エピタキシャル層上に形成された第2エピタキシャル層からなる前記エクステンション領域と
を備えたことを特徴とする半導体装置。 - 前記第1エピタキシャル層は前記半導体基板の不純物濃度を有する
ことを特徴とする請求項1記載の半導体装置。 - 前記エクステンション領域は前記ゲート電極に近づくにつれて膜厚が薄くなっている
ことを特徴とする請求項1記載の半導体装置。 - 前記第1エピタキシャル層はエピタキシャル成長時にIn-situドーピングにて前記半導体基板の不純物濃度に不純物がドーピングされたものからなり、
前記第2エピタキシャル層はエピタキシャル成長時にIn-situドーピングにて前記エクステンション領域となる不純物濃度に不純物がドーピングされたものからなる
ことを特徴とする請求項1記載の半導体装置。 - 半導体基板上にゲート絶縁膜を介してゲート電極を形成する工程と、
前記ゲート電極の側面にサイドウォールスペーサーを形成する工程と、
前記ゲート電極の両側の前記半導体基板上にエクステンション領域を形成する工程と、
前記エクステンション領域上にソース・ドレイン領域を形成する工程とを備えた半導体装置の製造方法において、
前記サイドウォールスペーサーを形成した際に削られた前記半導体基板部分を埋め込むように第1エピタキシャル層を形成する工程と、
前記第1エピタキシャル層上に前記第1エピタキシャル層とは逆導電型の第2エピタキシャル層からなる前記エクステンション領域を形成する工程と
を備えたことを特徴とする半導体装置の製造方法。 - 前記第1エピタキシャル層を前記半導体基板の不純物濃度となるように形成する
ことを特徴とする請求項5記載の半導体装置の製造方法。 - 前記第1エピタキシャル層を形成する前に、前記半導体基板の削られた部分のテーパー面を前記半導体基板の結晶方位に合わせる薬液処理を行う
ことを特徴とする請求項5記載の半導体装置の製造方法。 - 前記第1エピタキシャル層を形成するエピタキシャル成長を前記半導体基板の削られた形状に合わせたエピタキシャル成長条件で行う
ことを特徴とする請求項5記載の半導体装置の製造方法。 - 前記第1エピタキシャル層を形成する工程では、エピタキシャル成長時にIn-situドーピングにて前記半導体基板の不純物濃度に不純物をドーピングし、
前記第2エピタキシャル層を形成する工程では、エピタキシャル成長時にIn-situドーピングにて前記エクステンション領域を形成する不純物濃度に不純物をドーピングする
ことを特徴とする請求項5記載の半導体装置の製造方法。 - 前記エクステンション領域を前記ゲート電極に近づくにつれて膜厚が薄くなるように形成する
ことを特徴とする請求項5記載の半導体装置の製造方法。
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JP2005050213A JP4867176B2 (ja) | 2005-02-25 | 2005-02-25 | 半導体装置の製造方法 |
US11/358,022 US7557396B2 (en) | 2005-02-25 | 2006-02-21 | Semiconductor device and method of manufacturing semiconductor device |
US12/472,860 US8012840B2 (en) | 2005-02-25 | 2009-05-27 | Semiconductor device and method of manufacturing semiconductor device |
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Also Published As
Publication number | Publication date |
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US20060192232A1 (en) | 2006-08-31 |
US7557396B2 (en) | 2009-07-07 |
US8012840B2 (en) | 2011-09-06 |
JP4867176B2 (ja) | 2012-02-01 |
US20090233411A1 (en) | 2009-09-17 |
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