JP7394627B2 - ディスプレイおよび当該ディスプレイを備えた電子機器 - Google Patents
ディスプレイおよび当該ディスプレイを備えた電子機器 Download PDFInfo
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- JP7394627B2 JP7394627B2 JP2019561383A JP2019561383A JP7394627B2 JP 7394627 B2 JP7394627 B2 JP 7394627B2 JP 2019561383 A JP2019561383 A JP 2019561383A JP 2019561383 A JP2019561383 A JP 2019561383A JP 7394627 B2 JP7394627 B2 JP 7394627B2
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- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
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Description
本実施の形態では、本発明の一態様に係るディスプレイの構成例について説明する。
本実施の形態では、実施の形態1で説明したOSトランジスタの詳細について説明する。
本実施の形態では、SiトランジスタとOSトランジスタの積層構造を有するマイクロコントローラ30に適用可能な半導体装置900の断面構成例について図面を用いて説明する。なお本実施の形態で説明する断面構成例は、上記実施の形態で説明した定電流回路にも適用可能である。
図9に、半導体装置900の一部の断面を示す。図9に示す半導体装置900は、基板231上に、層300および層301を積層している。図9では、基板231として単結晶半導体基板(例えば、単結晶シリコン基板)を用いる場合を示している。層300に含まれるトランジスタは、ソース、ドレイン、およびチャネルが、基板231の一部に形成される。また、層301には薄膜トランジスタ(例えば、OSトランジスタ)が含まれる。
図9において、層300は、基板231上にトランジスタ233a、トランジスタ233b、およびトランジスタ233cを有する。図9では、トランジスタ233a、トランジスタ233b、およびトランジスタ233cのチャネル長方向の断面を示している。
層301は、層300上に設けられる。図9において、層301は、トランジスタ368a、トランジスタ368b、容量素子369a、および容量素子369bを有する。図9では、トランジスタ368aおよびトランジスタ368bのチャネル長方向の断面を示している。なお、トランジスタ368a、およびトランジスタ368bは、バックゲートを有するトランジスタである。
〔基板〕
基板として用いる材料に大きな制限はないが、少なくとも後の加熱処理に耐えうる程度の耐熱性を有していることが必要となる。例えば、基板としてシリコンや炭化シリコンなどを材料とした単結晶半導体基板、多結晶半導体基板、シリコンゲルマニウムなどを材料とした化合物半導体基板等を用いることができる。また、SOI基板や、半導体基板上に歪トランジスタやFIN型トランジスタなどの半導体素子が設けられたものなどを用いることもできる。または、高電子移動度トランジスタ(HEMT:High Electron Mobility Transistor)に適用可能なヒ化ガリウム、ヒ化アルミニウムガリウム、ヒ化インジウムガリウム、窒化ガリウム、リン化インジウム、シリコンゲルマニウムなどを用いてもよい。すなわち、基板は、単なる支持基板に限らず、他のトランジスタなどのデバイスが形成された基板であってもよい。
絶縁層は、窒化アルミニウム、酸化アルミニウム、窒化酸化アルミニウム、酸化窒化アルミニウム、酸化マグネシウム、窒化シリコン、酸化シリコン、窒化酸化シリコン、酸化窒化シリコン、酸化ガリウム、酸化ゲルマニウム、酸化イットリウム、酸化ジルコニウム、酸化ランタン、酸化ネオジム、酸化ハフニウム、酸化タンタル、アルミニウムシリケートなどから選ばれた材料を、単層でまたは積層して用いる。また、酸化物材料、窒化物材料、酸化窒化物材料、窒化酸化物材料のうち、複数の材料を混合した材料を用いてもよい。
電極を形成するための導電性材料としては、アルミニウム、クロム、銅、銀、金、白金、タンタル、ニッケル、チタン、モリブデン、タングステン、ハフニウム、バナジウム、ニオブ、マンガン、マグネシウム、ジルコニウム、ベリリウム、インジウムなどから選ばれた金属元素を1種以上含む材料を用いることができる。また、リン等の不純物元素を含有させた多結晶シリコンに代表される、電気伝導度が高い半導体、ニッケルシリサイドなどのシリサイドを用いてもよい。
半導体層として、単結晶半導体、多結晶半導体、微結晶半導体、または非晶質半導体などを、単体でまたは組み合わせて用いることができる。半導体材料としては、例えば、シリコンや、ゲルマニウムなどを用いることができる。また、シリコンゲルマニウム、炭化シリコン、ガリウムヒ素、酸化物半導体、窒化物半導体などの化合物半導体や、有機半導体などを用いることができる。
酸化物半導体は、少なくともインジウムまたは亜鉛を含むことが好ましい。特にインジウムおよび亜鉛を含むことが好ましい。また、それらに加えて、アルミニウム、ガリウム、イットリウムまたはスズなどが含まれていることが好ましい。また、ホウ素、シリコン、チタン、鉄、ニッケル、ゲルマニウム、ジルコニウム、モリブデン、ランタン、セリウム、ネオジム、ハフニウム、タンタル、タングステン、またはマグネシウムなどから選ばれた一種、または複数種が含まれていてもよい。
以下では、本発明の一態様で開示されるトランジスタに用いることができるCAC(Cloud-Aligned Composite)-OSの構成について説明する。
酸化物半導体(金属酸化物)は、単結晶酸化物半導体と、それ以外の非単結晶酸化物半導体と、に分けられる。非単結晶酸化物半導体としては、例えば、CAAC-OS(c-axis aligned crystalline oxide semiconductor)、多結晶酸化物半導体、nc-OS(nanocrystalline oxide semiconductor)、擬似非晶質酸化物半導体(a-like OS:amorphous-like oxide semiconductor)および非晶質酸化物半導体などがある。
続いて、上記金属酸化物をトランジスタのチャネル形成領域に用いる場合について説明する。
ここで、金属酸化物中における各不純物の影響について説明する。
絶縁層を形成するための絶縁性材料、電極を形成するための導電性材料、または半導体層を形成するための半導体材料は、スパッタリング法、スピンコート法、CVD(Chemical Vapor Deposition)法(熱CVD法、MOCVD(Metal Organic Chemical Vapor Deposition)法、PECVD(Plasma Enhanced CVD)法、高密度プラズマCVD(High density plasma CVD)法、LPCVD(low pressure CVD)法、APCVD(atmospheric pressure CVD)法等を含む)、ALD(Atomic Layer Deposition)法、または、MBE(Molecular Beam Epitaxy)法、または、PLD(Pulsed Laser Deposition)法、ディップ法、スプレー塗布法、液滴吐出法(インクジェット法など)、印刷法(スクリーン印刷、オフセット印刷など)を用いて形成することができる。
本実施の形態では、本発明の一態様におけるマイクロコントローラおよび表示素子の実装方法の一例について図面を参照して説明する。
本実施の形態では、上記実施の形態で例示したディスプレイに適用可能な半導体装置について説明する。以下で例示する半導体装置は、記憶装置として機能することができる。
本実施の形態では、本発明の一態様のディスプレイを備えた電子機器について、図面を参照して説明する。
Claims (5)
- 複数の画素を有し、
前記画素は、第1の表示素子乃至第3の表示素子と、マイクロコントローラと、を有し、
前記第1の表示素子は、第1のマイクロ発光ダイオードを有し、
前記第2の表示素子は、第2のマイクロ発光ダイオードを有し、
前記第3の表示素子は、第3のマイクロ発光ダイオードを有し、
前記マイクロコントローラは、第1のトランジスタ乃至第3のトランジスタと、三角波生成回路と、第1のコンパレータ乃至第3のコンパレータと、第1のスイッチ乃至第3のスイッチと、第1の定電流回路乃至第3の定電流回路と、を有し、
前記第1の定電流回路乃至前記第3の定電流回路の各々は、チャネル形成領域に酸化物半導体を含む第4のトランジスタ及び第5のトランジスタと、チャネル形成領域にシリコンを含む第6のトランジスタ及び第7のトランジスタと、を有し、
前記第1のトランジスタは、オフ状態とすることで前記画素に書き込まれる第1の画像データに応じた第1の電位を保持する機能を有し、
前記第2のトランジスタは、オフ状態とすることで前記画素に書き込まれる第2の画像データに応じた第2の電位を保持する機能を有し、
前記第3のトランジスタは、オフ状態とすることで前記画素に書き込まれる第3の画像データに応じた第3の電位を保持する機能を有し、
前記三角波生成回路は、三角波の信号を生成する機能を有し、
前記第1のコンパレータは、前記第1の電位と、前記三角波の信号とに応じた第1の出力信号を生成する機能を有し、
前記第2のコンパレータは、前記第2の電位と、前記三角波の信号とに応じた第2の出力信号を生成する機能を有し、
前記第3のコンパレータは、前記第3の電位と、前記三角波の信号とに応じた第3の出力信号を生成する機能を有し、
前記第1のスイッチは、前記第1の出力信号に応じて前記第1の定電流回路を流れる電流を前記第1の表示素子に流すか否かを制御する機能を有し、
前記第2のスイッチは、前記第2の出力信号に応じて前記第2の定電流回路を流れる電流を前記第2の表示素子に流すか否かを制御する機能を有し、
前記第3のスイッチは、前記第3の出力信号に応じて前記第3の定電流回路を流れる電流を前記第3の表示素子に流すか否かを制御する機能を有し、
前記第1の定電流回路乃至前記第3の定電流回路の各々において、
前記第4のトランジスタは、ソースまたはドレインの一方が、前記第6のトランジスタのソースまたはドレインの一方、前記第6のトランジスタのゲート、及び前記第5のトランジスタのソースまたはドレインの一方と電気的に接続され、
前記第5のトランジスタは、ソースまたはドレインの他方が前記第7のトランジスタのゲートと電気的に接続され、
前記第5のトランジスタは、ゲートが前記第4のトランジスタのゲートと電気的に接続され、
前記第6のトランジスタは、ソースまたはドレインの他方が電源電圧の与えられる配線と電気的に接続され、
前記第7のトランジスタは、ソースまたはドレインの一方が前記配線と電気的に接続され、
前記第1の定電流回路において、前記第7のトランジスタは、前記第1のスイッチを介して前記電流を前記第1の表示素子に供給する機能を有し、
前記第2の定電流回路において、前記第7のトランジスタは、前記第2のスイッチを介して前記電流を前記第2の表示素子に供給する機能を有し、
前記第3の定電流回路において、前記第7のトランジスタは、前記第3のスイッチを介して前記電流を前記第3の表示素子に供給する機能を有するディスプレイ。 - 請求項1において、
前記第1のトランジスタは、チャネル形成領域を有する第1の半導体層を有し、
前記第1の半導体層は、酸化物半導体を含むディスプレイ。 - 請求項1または請求項2において、
前記第1のコンパレータおよび前記第1のスイッチは、第6のトランジスタを有し、
前記第6のトランジスタは、チャネル形成領域を有する第2の半導体層を有し、
前記第2の半導体層は、シリコンを含むディスプレイ。 - 請求項1乃至請求項3のいずれか一において、
前記第1のマイクロ発光ダイオードは、ガリウム窒化物、およびインジウム・窒化ガリウム化合物を含む活性層およびクラッド層を備えた素子であるディスプレイ。 - 請求項1乃至請求項4のいずれか一項に記載のディスプレイを備えた電子機器。
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CN111417997B (zh) | 2023-05-26 |
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TW201928925A (zh) | 2019-07-16 |
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