JP2012104844A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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Abstract
【解決手段】
一つの活性層204を挟んで二つの触媒元素導入領域201、202を配置して結晶化を行い、触媒元素導入領域201からの結晶成長と、触媒元素導入領域202からの結晶成長とがぶつかる境界部205をソース領域またはドレイン領域となる領域204bに形成する。
【選択図】図2
Description
例えば、上記熱処理温度570℃に代えて580℃とした時、結晶成長速度vは9.5μm/hrであるため、4.4時間での結晶化が可能となる。
に示した。
また、結晶化後、ニッケルをリンのゲッタリング作用により除去又は低減しており、活性層811〜814中に残存する触媒元素の濃度は、1×1017atms/cm3以下、好ましくは1×1016atms/cm3である。(図8(E))
また、30nm厚の珪素を含む絶縁膜に対して50nm厚の熱酸化膜が加わるので、最終的なゲート絶縁膜815の膜厚は105nmとなる。
と定義する。(図10(A))
の方向に移動し、リンドープ領域に含まれるリンによってゲッタリングされて捕獲された。こうしてゲッタリング領域(リンドープ領域に対応する領域)が形成される。これにより、リンドープ領域に含まれるニッケルの濃度は2×1017atoms/cm3以下(好ましくは1×1016atoms/cm3以下)にまで低減される。
によってスピン密度の差となって現れる。現状では本実施例の作製工程に従って作製された結晶質シリコン膜のスピン密度は少なくとも 5×1017spins/cm3以下(好ましくは 3×1017spins/cm3以下)であることが判明している。ただし、この測定値は現存する測定装置の検出限界に近いので、実際のスピン密度はさらに低いと予想される。
本実施例の活性層を用いたTFTは、MOSFETに匹敵する電気特性を示した。本出願人が試作したTFT(但し、活性層の膜厚は30nm、ゲート絶縁膜の膜厚は100nm)からは次に示す様なデータが得られている。
(2)TFTの動作速度の指標となる電界効果移動度(μFE)が、Nチャネル型TFTで 200〜650cm2/Vs (代表的には 300〜500cm2/Vs )、Pチャネル型TFTで100〜300cm2/Vs(代表的には 150〜200cm2/Vs)と大きい。
(3)TFTの駆動電圧の指標となるしきい値電圧(Vth)が、Nチャネル型TFTで-0.5〜1.5 V、Pチャネル型TFTで-1.5〜0.5 Vと小さい。
従って、構造の説明はpチャネル型TFT1101の説明を参照すれば良い。なお、本実施例ではシングルゲート構造としているが、ダブルゲート構造もしくはトリプルゲート構造であっても良い。
これらの有機EL材料や無機材料は公知の材料を用いることができる。
、(B)に示す。なお、本実施例において、4701はスイッチング用TFT4702のソース配線、4703はスイッチング用TFT4702のゲート配線、4704は電流制御用TFT、4705はコンデンサ(省略することも可能)、4706は電流供給線、、4707は電源制御用TFT、4709は電源制御用ゲート配線、4708はEL素子とする。電源制御用TFT4707の動作については特願平11−341272号を参照すると良い。
、(B)に示す。なお、本実施例において、4801はスイッチング用TFT4802のソース配線、4803はスイッチング用TFT4802のゲート配線、4804は電流制御用TFT、4805はコンデンサ(省略することも可能)、4806は電流供給線、、4807は消去用TFT、4808は消去用ゲート配線、4809はEL素子とする。消去用TFT4807の動作については特願平11−338786号を参照すると良い。
Claims (3)
- 第1の基板と、第2の基板と、前記第1の基板と前記第2の基板との間に設けられた液晶と、を有する半導体装置であって、
前記第1の基板は、
ソース領域、ドレイン領域及びチャネル形成領域を有する半導体膜を活性層とするTFTと、
前記TFT上に設けられた、開口部を有する層間絶縁膜と、
前記層間絶縁膜上に設けられ、前記開口部を介して前記ソース領域又は前記ドレイン領域と電気的に接続された画素電極と、を有し、
前記半導体膜は、結晶化を助長する触媒元素が導入された複数の領域から結晶成長された結晶構造を含む半導体膜からなり、
前記結晶構造を含む半導体膜は、前記結晶成長された領域同士がぶつかる領域に形成された境界部を有し、
前記境界部は、前記ソース領域又は前記ドレイン領域に含まれており、
前記第2の基板は対向電極を有し、
前記第1の基板と前記第2の基板とは、前記開口部と重なるように前記画素電極上に設けられたスペーサを介して貼り合わされていることを特徴とする半導体装置。 - 第1の基板と、第2の基板と、前記第1の基板と前記第2の基板との間に設けられた液晶と、を有する半導体装置であって、
前記第1の基板は、
ソース領域、ドレイン領域及び複数のチャネル形成領域を有する半導体膜を活性層とするTFTと、
前記TFT上に設けられた、開口部を有する層間絶縁膜と、
前記層間絶縁膜上に設けられ、前記開口部を介して前記ソース領域又は前記ドレイン領域と電気的に接続された画素電極と、を有し、
前記半導体膜は、結晶化を助長する触媒元素が導入された複数の領域から結晶成長された結晶構造を含む半導体膜からなり、
前記結晶構造を含む半導体膜は、前記結晶成長された領域同士がぶつかる領域に形成された境界部を有し、
前記境界部は、前記複数のチャネル形成領域の間に設けられ、
前記第2の基板は対向電極を有し、
前記第1の基板と前記第2の基板とは、前記開口部と重なるように前記画素電極上に設けられたスペーサを介して貼り合わされていることを特徴とする半導体装置。 - 請求項1又は2において、
前記結晶化を助長する触媒元素は、Ni、Fe、Co、Cu、Ge、Pdから選ばれた一種または複数種類の元素であることを特徴とする半導体装置。
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Also Published As
| Publication number | Publication date |
|---|---|
| US8314426B2 (en) | 2012-11-20 |
| US20120062809A1 (en) | 2012-03-15 |
| US6909115B2 (en) | 2005-06-21 |
| EP1052700A1 (en) | 2000-11-15 |
| EP2105966A3 (en) | 2011-03-23 |
| JP6062497B2 (ja) | 2017-01-18 |
| JP4912521B2 (ja) | 2012-04-11 |
| EP2105966A2 (en) | 2009-09-30 |
| US20100195012A1 (en) | 2010-08-05 |
| US20030173567A1 (en) | 2003-09-18 |
| US20050269569A1 (en) | 2005-12-08 |
| JP2016208043A (ja) | 2016-12-08 |
| JP2019204959A (ja) | 2019-11-28 |
| US7696514B2 (en) | 2010-04-13 |
| JP2014239241A (ja) | 2014-12-18 |
| JP2001036094A (ja) | 2001-02-09 |
| EP2105966B1 (en) | 2017-08-23 |
| JP2015222429A (ja) | 2015-12-10 |
| US8026518B2 (en) | 2011-09-27 |
| EP2264764A2 (en) | 2010-12-22 |
| US6680487B1 (en) | 2004-01-20 |
| JP2018160693A (ja) | 2018-10-11 |
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