JP5396030B2 - 半導体装置の作製方法 - Google Patents
半導体装置の作製方法 Download PDFInfo
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- JP5396030B2 JP5396030B2 JP2008048322A JP2008048322A JP5396030B2 JP 5396030 B2 JP5396030 B2 JP 5396030B2 JP 2008048322 A JP2008048322 A JP 2008048322A JP 2008048322 A JP2008048322 A JP 2008048322A JP 5396030 B2 JP5396030 B2 JP 5396030B2
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- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1259—Multistep manufacturing methods
- H01L27/127—Multistep manufacturing methods with a particular formation, treatment or patterning of the active layer specially adapted to the circuit arrangement
- H01L27/1274—Multistep manufacturing methods with a particular formation, treatment or patterning of the active layer specially adapted to the circuit arrangement using crystallisation of amorphous semiconductor or recrystallisation of crystalline semiconductor
- H01L27/1285—Multistep manufacturing methods with a particular formation, treatment or patterning of the active layer specially adapted to the circuit arrangement using crystallisation of amorphous semiconductor or recrystallisation of crystalline semiconductor using control of the annealing or irradiation parameters, e.g. using different scanning direction or intensity for different transistors
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- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/04—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their crystalline structure, e.g. polycrystalline, cubic or particular orientation of crystalline planes
- H01L29/045—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their crystalline structure, e.g. polycrystalline, cubic or particular orientation of crystalline planes by their particular orientation of crystalline planes
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Description
本実施の形態では、非晶質半導体膜上にキャップ膜を形成し、当該キャップ膜を介して非晶質半導体膜に連続発振のレーザビーム又は繰り返し周波数が10MHz以上のパルス発振のレーザビームを照射して、表面の面方位が{001}の結晶と、面方位が{211}または{101}の結晶を有する結晶性半導体膜の作製方法について、図1、図6乃至図8を用いて示す。
本実施の形態では、上記実施の形態とは異なるキャップ膜の構造により、観察面Aの面方位が{001}の結晶領域と、面方位が{211}または{101}の結晶領域を有する結晶性半導体膜の作製方法について、図2を用いて示す。
本実施の形態では、上記実施の形態とは異なるキャップ膜の構造により、観察面Aの面方位が{001}の結晶と、面方位が{211}または{101}の結晶を有する結晶性半導体膜の作製方法について、図3を用いて示す。
本実施の形態では、上記実施の形態とは異なるキャップ膜の構造により、観察面Aの面方位が{001}の結晶と、面方位が{211}または{101}の結晶を有する結晶性半導体膜の作製方法について、図4を用いて示す。
本実施の形態では、上記実施の形態で示す観察面Aにおいて面方位{001}の結晶領域、面方位{211}の結晶領域、及び面方位{101}の結晶領域を作製することが可能な、レーザビームのパワー及び走査速度について、図6を用いて説明する。
y = 0.0012x2+ 0.083x + 4.4 (式1)
y = 0.28x + 4.2 (式2)
y = −0.0683x + 11.167 (式3)
y = −0.37x + 33 (式5)
本実施の形態では、非晶質半導体膜上にSiNxOy(x<y)のキャップ膜を形成し、当該キャップ膜を介して非晶質半導体膜に連続発振のレーザビーム又は繰り返し周波数が10MHz以上のパルス発振のレーザビームを照射して、単結晶構造に近い多結晶構造を持つ半導体膜及びその作製方法について、図5を用いて示す。
本実施の形態では、半導体装置の一例である液晶表示装置について図9、及び図10を用いて説明する。図9(A)に示すように、実施の形態1と同様に基板100上に下地膜として機能する絶縁膜101を形成し、絶縁膜101上に半導体膜102を形成し、半導体膜102上にキャップ膜103を形成する。
本実施の形態では、半導体装置の一例である発光素子を有する発光装置の作製工程について説明する。
図11(A)に示すように、実施の形態7と同様の工程により、基板100上に絶縁膜101を介して薄膜トランジスタ225〜227を形成し、その薄膜トランジスタ225〜227のゲート電極及び配線を絶縁化する第1の層間絶縁膜として、酸化珪素膜231、窒化珪素膜232、及び酸化珪素膜233を積層して形成する。さらに、第1の層間絶縁膜の一部の酸化珪素膜233上に薄膜トランジスタ225〜227の半導体層に接続する配線308〜313、及び接続端子314を形成する。
本実施の形態では、非接触でデータの伝送が可能な半導体装置の作製工程を図13〜16を用いて説明する。また、半導体装置の構成について図17を用いて説明し、更に本実施の形態で示す半導体装置の用途を図18を用いて説明する。
その剥離膜402として、タングステンを含む層とタングステンの酸化物を含む層の積層構造を形成する場合、タングステンを含む層を形成し、その上層に酸化物で形成される絶縁膜を形成することで、タングステン層と絶縁膜との界面に、タングステンの酸化物を含む層が形成されることを活用してもよい。
上記実施の形態7ないし9に示される半導体装置を有する電子機器として、テレビジョン装置(単にテレビ、又はテレビジョン受信機ともよぶ)、デジタルカメラ、デジタルビデオカメラのカメラ、携帯電話装置(単に携帯電話機、携帯電話ともよぶ)、PDA等の携帯情報端末、携帯型ゲーム機、コンピュータ用のモニタ、コンピュータ、カーオーディオ等の音響再生装置、家庭用ゲーム機等の記録媒体を備えた画像再生装置等が挙げられる。その具体例について、図19を参照して実施の形態10として説明する。
その際の成膜条件は以下の通りである。
<SiNxOy(x>y)膜>
・厚さ 50nm
・ガスの種類(流量)
SiH4(10sccm)
NH3(100sccm)
N2O (20sccm)
H2(400sccm)
・基板温度 300℃
・圧力 40Pa
・RF周波数 27MHz
・RFパワー 50W
・電極間距離 30mm
・電極面積 615.75cm2
・厚さ 100nm
・ガスの種類(流量)
SiH4(4sccm)
N2O (800sccm)
・基板温度 400℃
・圧力 40Pa
・RF周波数 27MHz
・RFパワー 50W
・電極間距離 15mm
・電極面積 615.75cm2
<非晶質珪素膜>
・厚さ 66nm
・ガスの種類(流量)
SiH4(25sccm)
H2(150sccm)
・基板温度 250℃
・圧力 66.7Pa
・RF周波数 27MHz
・RFパワー 30W
・電極間距離 25mm
・電極面積 615.75cm2
<SiNxOy(x<y)膜>
・厚さ 500nm
・ガスの種類(流量)
SiH4(4sccm)
N2O(800sccm)
・基板温度 400℃
・圧力 40Pa
・RF周波数 60MHz
・RFパワー 150W
・電極間距離 28mm
・電極面積 844.53cm2
<SiNxOy(x>y)膜>
・厚さ 400nm
・ガスの種類(流量)
SiH4(10sccm)
NH3(100sccm)
N2O(20sccm)
H2(400sccm)
・基板温度 300℃
・圧力 40Pa
・RF周波数 27MHz
・RFパワー 50W
・電極間距離 30mm
・電極面積 615.75cm2
基板上に絶縁膜、非晶質半導体膜を形成した。このときの形成工程及び形成条件は実施例1と同様である。
Claims (4)
- 絶縁性基板上に非晶質半導体膜を形成し、
前記非晶質半導体膜上に珪素と、窒素と、酸素とを有する絶縁膜を形成し、
前記非晶質半導体膜の第1の領域に繰り返し周波数が10MHz以上のパルス発振の第1のレーザビームを照射して、膜表面に対して平行な面方位が{001}の第1の結晶領域を形成し、
前記非晶質半導体膜の第2の領域に繰り返し周波数が10MHz以上のパルス発振であって、前記第1のレーザビームのパワー(W)より高いパワー(W)で第2のレーザビームを照射して、膜表面に対して平行な面方位が{211}の第2の結晶領域を形成する半導体装置の作製方法であって、
前記珪素と、窒素と、酸素とを有する絶縁膜は、7.13%フッ化水素アンモニウム及び15.4%フッ化アンモニウムの混合水溶液またはフッ酸水溶液を用い20℃でエッチングしたときのエッチング速度が1nm/分以上150nm/分以下となることを特徴とする半導体装置の作製方法。 - 絶縁性基板上に非晶質半導体膜を形成し、
前記非晶質半導体膜上に珪素と、窒素と、酸素とを有する絶縁膜を形成し、
前記非晶質半導体膜の第1の領域に繰り返し周波数が10MHz以上のパルス発振の第1のレーザビームを照射して、膜表面に対して平行な面方位が{001}の第1の結晶領域を形成し、
前記非晶質半導体膜の第2の領域に繰り返し周波数が10MHz以上のパルス発振であって、前記第1のレーザビームのパワー(W)より高いパワー(W)で第2のレーザビームを照射して、膜表面に対して平行な面方位が{211}の第2の結晶領域を形成する半導体装置の作製方法であって、
前記珪素と、窒素と、酸素とを有する絶縁膜は、ハイドロフルオロカーボンガスによるドライエッチングのエッチング速度が100nm/分以上150nm/分以下となることを特徴とする半導体装置の作製方法。 - 請求項1または2において、
前記珪素と、窒素と、酸素とを有する絶縁膜は、SiNxOy(0≦x≦1.5、0≦y≦2、0≦4x+3y≦6)であることを特徴とする半導体装置の作製方法。 - 請求項1乃至請求項3のいずれか一において、
前記珪素と、窒素と、酸素とを有する絶縁膜の厚さは、200nm以上1000nm以下であることを特徴とする半導体装置の作製方法。
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