JP5271541B2 - 半導体小片の製造方法ならびに電界効果トランジスタおよびその製造方法 - Google Patents
半導体小片の製造方法ならびに電界効果トランジスタおよびその製造方法 Download PDFInfo
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- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- 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
- H01L27/1262—Multistep manufacturing methods with a particular formation, treatment or coating of the substrate
- H01L27/1266—Multistep manufacturing methods with a particular formation, treatment or coating of the substrate the substrate on which the devices are formed not being the final device substrate, e.g. using a temporary substrate
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- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
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- H01L27/04—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 a semiconductor body
- H01L27/06—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 a semiconductor body including a plurality of individual components in a non-repetitive configuration
- H01L27/0688—Integrated circuits having a three-dimensional layout
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- 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
- H01L27/1203—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 the substrate comprising an insulating body on a semiconductor body, e.g. SOI
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- 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
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- 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
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Description
本発明の製造方法では、まず、基板上に犠牲層と半導体層とをこの順序で繰り返し積層することによって、2層以上の半導体層を基板上に形成する(工程(i))。例えば、基板上に、犠牲層/半導体層/犠牲層/半導体層という順に積層する。半導体層の数が多いほど、1枚の基板から製造される半導体小片の数が多くなる。半導体層の数は、2層、3層、4層、またはそれ以上であってもよい。
本発明のFETは、半導体小片と、ソース電極と、ドレイン電極と、ゲート電極とを備える。半導体小片には、2つの低抵抗領域が形成されており、2つの低抵抗領域に挟まれた部分の少なくとも一部がチャネル領域として機能する。半導体小片の一方の低抵抗領域には、ソース電極が接続されている。半導体小片の他方の低抵抗領域には、ドレイン電極が接続されている。ゲート電極は、半導体小片の近傍に配置されている。なお、ゲート電極と半導体小片との間には、ゲート絶縁膜が存在する。
電界効果トランジスタを製造するための本発明の方法では、まず、本発明の製造方法によって半導体小片を製造する(工程(I))。次に、半導体小片を基板上に配置する。次に、半導体小片にソース電極とドレイン電極とを接続する(工程(II))。このようにして、半導体小片を、チャネル領域として機能させることが可能となる。なお、基板上にソース電極とドレイン電極とを形成しておき、半導体小片を基板上に配置すると同時に半導体小片にソース電極とドレイン電極とを接続してもよい。ゲート絶縁層およびゲート電極は、必要に応じて形成する。半導体小片以外の部分は、公知の方法によって形成できる。本発明の方法によれば、薄膜トランジスタを製造できる。
図1A〜1Fおよび図2A〜2Eを参照しながら、半導体小片の製造方法の一例を以下に説明する。図1A、1C、1E、2Aおよび2Cは上面図である。図1B、1D、1F、2Bおよび2Dは、それぞれ、図1A、1C、1E、2Aおよび2Cの断面図である。なお、以下の図は模式図である。実際には、1枚のウェハから数百以上の半導体結晶小片を製造することが可能である。
実施形態2では、両端に低抵抗領域を備える半導体結晶小片を製造する方法の一例について説明する。実施形態2の製造工程の一部を、図4A〜4Fに示す。図4A、4Cおよび4Eは上面図であり、図4B、4Dおよび4Fはそれらの断面図である。
実施形態3では、一主面に絶縁層が形成された半導体結晶小片を製造する方法の一例について説明する。実施形態3の製造工程の一部を、図6A〜6Hに示す。図6A、6C、6Eおよび6Gは上面図であり、図6B、6D、6Fおよび6Hはそれらの断面図である。
実施形態4では、電界効果トランジスタを形成する方法の一例について説明する。別の観点では、この製造方法は、電界効果トランジスタとして機能する半導体結晶小片の製造方法である。実施形態4の製造工程を、図8A〜8Hに示す。図8A、8C、8Eおよび8Gは上面図であり、図8B、8D、8Fおよび8Hはそれらの断面図である。
実施形態5では、半導体結晶小片51を用いて電界効果トランジスタ(FET)を製造する方法の一例について説明する。製造工程を図9A〜9Fおよび図10A〜10Bに示す。図9A、9C、9Eおよび10Aは上面図であり、図9B、9D、9Fおよび10Bはそれらの断面図である。
図11A〜11Cを参照しながら、半導体結晶小片51を親液性領域94上に配置する方法の一例について説明する。まず、図11Aに示すように、分散媒111と、分散媒111の中に1つだけ配置された半導体結晶小片51とからなる液滴112を形成する。液滴112の形成方法に限定はない。液滴112の形成方法の一例については、後述する。
以下に、本発明の半導体結晶小片を用いて製造可能なディスプレイの一例について説明する。実施形態6では、有機エレクトロルミネッセンス素子(有機EL素子)を用いたディスプレイについて説明する。
Claims (12)
- (i)基板上に犠牲層と半導体層とをこの順序で繰り返し積層することによって、2層以上の前記半導体層を前記基板上に形成する工程と、
(ii)前記犠牲層の一部および前記半導体層の一部をエッチングすることによって、前記半導体層を複数の小片に分割する工程と、
(iii)前記犠牲層を除去することによって、前記小片を前記基板から分離する工程とを含む、半導体小片の製造方法。 - 前記(iii)の工程において、ウエットエッチングによって前記犠牲層を除去する請求項1に記載の製造方法。
- 前記(iii)の工程の前に、前記小片の両端の部分を低抵抗化する工程をさらに含む請求項1に記載の製造方法。
- 前記(i)の工程は、前記犠牲層と前記半導体層と絶縁層とをこの順序で繰り返し積層する工程であり、
前記(ii)の工程は、前記犠牲層の一部、前記半導体層の一部および前記絶縁層の一部をエッチングすることによって、前記半導体層と前記絶縁層とを複数の小片に分割する工程である請求項1に記載の製造方法。 - 前記(i)の工程は、前記犠牲層と前記半導体層と絶縁層と導電層とをこの順序で繰り返し積層する工程であり、
前記(ii)の工程は、前記犠牲層の一部、前記半導体層の一部、前記絶縁層の一部および前記導電層の一部をエッチングすることによって、前記半導体層と前記絶縁層と前記導電層とを複数の小片に分割する工程である請求項1に記載の製造方法。 - 前記犠牲層が結晶からなる請求項1に記載の製造方法。
- 前記犠牲層がSiGeの結晶からなり、前記半導体層がシリコンの結晶からなる請求項6に記載の製造方法。
- 前記犠牲層が有機高分子層であり、
前記(i)の工程において、前記有機高分子層で前記半導体層を接着することによって前記半導体層を積層する請求項1に記載の製造方法。 - 前記半導体層が結晶からなる請求項1に記載の製造方法。
- 前記半導体層が単結晶からなる請求項1に記載の製造方法。
- 前記(iii)の工程ののちに、前記小片を液体に分散させる工程をさらに含む請求項1に記載の製造方法。
- (I)請求項1〜11のいずれか1項に記載の製造方法によって半導体小片を製造する工程と、
(II)前記半導体小片にソース電極とドレイン電極とを接続する工程とを含む、電界効果トランジスタの製造方法。
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US20100224915A1 (en) | 2010-09-09 |
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US8242025B2 (en) | 2012-08-14 |
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