JP7018990B2 - 撮像装置 - Google Patents
撮像装置 Download PDFInfo
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- JP7018990B2 JP7018990B2 JP2020095965A JP2020095965A JP7018990B2 JP 7018990 B2 JP7018990 B2 JP 7018990B2 JP 2020095965 A JP2020095965 A JP 2020095965A JP 2020095965 A JP2020095965 A JP 2020095965A JP 7018990 B2 JP7018990 B2 JP 7018990B2
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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Description
本実施の形態では、本発明の一態様である撮像装置について、図面を参照して説明する。
本実施の形態では、実施の形態1で説明したニューラルネットワークに用いることが可能な半導体装置の構成例について説明する。
図10に、ニューラルネットワークの演算を行う機能を有する半導体装置MACの構成例を示す。半導体装置MACは、ニューロン間の結合強度(重み)に対応する第1のデータと、入力データに対応する第2のデータの積和演算を行う機能を有する。なお、第1のデータおよび第2のデータはそれぞれ、アナログデータまたは多値のデータ(離散的なデータ)とすることができる。また、半導体装置MACは、積和演算によって得られたデータを活性化関数によって変換する機能を有する。
上記の半導体装置MACを用いて、第1のデータと第2のデータの積和演算を行うことができる。以下、積和演算を行う際の半導体装置MACの動作例を説明する。
まず、時刻T01-T02において、配線WL[1]の電位がハイレベルとなり、配線WD[1]の電位が接地電位(GND)よりもVPR-VW[1,1]大きい電位となり、配線WDrefの電位が接地電位よりもVPR大きい電位となる。また、配線RW[1]、および配線RW[2]の電位が基準電位(REFP)となる。なお、電位VW[1,1]はメモリセルMC[1,1]に格納される第1のデータに対応する電位である。また、電位VPRは参照データに対応する電位である。これにより、メモリセルMC[1,1]およびメモリセルMCref[1]が有するトランジスタTr11がオン状態となり、ノードNM[1,1]の電位がVPR-VW[1,1]、ノードNMref[1]の電位がVPRとなる。
次に、時刻T05-T06において、配線RW[1]の電位が基準電位よりもVX[1]大きい電位となる。このとき、メモリセルMC[1,1]、およびメモリセルMCref[1]のそれぞれの容量素子C11には電位VX[1]が供給され、容量結合によりトランジスタTr12のゲートの電位が上昇する。なお、電位Vx[1]はメモリセルMC[1,1]およびメモリセルMCref[1]に供給される第2のデータに対応する電位である。
本実施の形態では、本発明の一態様の撮像装置の構成例などについて説明する。
本発明の一態様に係る撮像装置を用いることができる電子機器として、表示機器、パーソナルコンピュータ、記録媒体を備えた画像記憶装置または画像再生装置、携帯電話、携帯型を含むゲーム機、携帯データ端末、電子書籍端末、ビデオカメラ、デジタルスチルカメラ等のカメラ、ゴーグル型ディスプレイ(ヘッドマウントディスプレイ)、ナビゲーションシステム、音響再生装置(カーオーディオ、デジタルオーディオプレイヤー等)、複写機、ファクシミリ、プリンタ、プリンタ複合機、現金自動預け入れ払い機(ATM)、自動販売機などが挙げられる。これら電子機器の具体例を図19(A)乃至(F)に示す。
Claims (3)
- フォトダイオードと、第1のトランジスタと、前記フォトダイオードから前記第1のトランジスタを介して出力された信号に応じたパルス信号を生成する回路と、を備えた撮像装置であって、
第1の層と第2の層が積層され、
前記第1の層内に前記第1のトランジスタを有し、
前記第2の層内に前記回路に含まれる第2のトランジスタを有し、
前記第1のトランジスタはチャネル形成領域に酸化物半導体を有し、
前記第2のトランジスタはチャネル形成領域にシリコンを有する、撮像装置。 - フォトダイオードと、第1のトランジスタと、前記フォトダイオードから前記第1のトランジスタを介して出力された信号に応じたパルス信号を生成する回路と、を備えた撮像装置であって、
第1の層と第2の層が積層され、
前記第1の層と前記第2の層との間に接合面を有し、
前記接合面を介して前記第1の層と前記第2の層とが電気的に接続され、
前記第1の層内に前記第1のトランジスタを有し、
前記第2の層内に前記回路に含まれる第2のトランジスタを有し、
前記第1のトランジスタはチャネル形成領域に酸化物半導体を有し、
前記第2のトランジスタはチャネル形成領域にシリコンを有する、撮像装置。 - 請求項2において、
前記接合面はCuを有する、撮像装置。
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