JP2020013059A - 装置の製造方法 - Google Patents
装置の製造方法 Download PDFInfo
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- JP2020013059A JP2020013059A JP2018136784A JP2018136784A JP2020013059A JP 2020013059 A JP2020013059 A JP 2020013059A JP 2018136784 A JP2018136784 A JP 2018136784A JP 2018136784 A JP2018136784 A JP 2018136784A JP 2020013059 A JP2020013059 A JP 2020013059A
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Abstract
Description
図面は模式的又は概念的なものであり、各部分の厚みと幅との関係、部分間の大きさの比率などは、必ずしも現実のものと同一とは限らない。同じ部分を表す場合であっても、図面により互いの寸法や比率が異なって表される場合もある。
本願明細書と各図において、既に説明したものと同様の要素には同一の符号を付して詳細な説明は適宜省略する。
図1に表した例において、装置1は、ショットキーバリアダイオードである。装置1は、半導体層10、第1電極21、絶縁部22、及び第2電極30を有する。
以下で説明する実施形態において、各半導体領域のp形とn形が反転されても良い。
図5は、実施形態に係る装置の製造方法を表す工程平面図である。
参考例として、以下のデバイスの製造方法が挙げられる。まず、基板Subの第1面S1に複数の構造体20を形成する。次に、第2面S2の全面に金属層30mを直接形成する。金属層30mの上にフォトレジストを形成する。続いて、フォトレジストを露光してパターニングする。パターニングされたフォトレジストをマスクとして用いて、金属層30mをパターニングする。この製造方法によれば、第2面S2に、互いに離間した複数の第2電極30を形成できる。第2電極30同士の間において基板Subをダイシングすることで、金属層30mをダイシングする必要が無い。
又は、基板Subをレーザダイシングする場合、金属層30mはレーザを反射する。基板Subをステルスダイシング(登録商標)する場合、金属層30mは基板Subよりもクラックが発生し難い。従って、これらの方法によりダイシングする場合、金属層30mは別の方法によりダイシングする必要があり、工程数が増加する。
参考例に係る製造方法によれば、金属層のダイシングが不要となることで、上記の課題を解決できる。
図7は、実施形態に係る製造方法により製造された別の装置を例示する平面図である。
図8(a)は斜視図であり、図8(b)は図8(a)のA−A’線における断面図である。
図11は、実施形態に係る装置の別の製造方法を表す工程斜視図である。
Claims (9)
- 第1面と、前記第1面の反対側の第2面と、を有する光透過性の基板に対して、前記第1面に前記基板よりも光透過性が低い構造体を設ける工程と、
前記第2面にネガ型のフォトレジストを設ける工程と、
前記構造体をマスクとして用いて、前記基板に光を透過させて前記フォトレジストの一部を露光する工程と、
を備えた装置の製造方法。 - 前記構造体は、前記第1面に複数設けられ、
前記複数の構造体は、互いに離間し、
前記露光する工程において、前記複数の構造体をマスクとして用いて、前記フォトレジストの前記一部を露光する請求項1記載の装置の製造方法。 - 前記露光する工程の後に前記フォトレジストの別の一部を除去し、前記第2面の一部を露出させる工程と、
前記フォトレジストの前記一部及び露出した前記第2面の前記一部を覆う金属層を形成する工程と、
前記フォトレジストの前記一部を除去することで前記金属層の一部を除去する工程と、
をさらに備えた請求項2記載の装置の製造方法。 - 前記複数の構造体のそれぞれは、第1電極と、前記第1電極の周りに設けられた絶縁部と、を有し、
前記金属層の前記一部を除去することで、互いに離間した複数の第2電極が前記第2面に形成される請求項3記載の装置の製造方法。 - 前記第1面と前記第2面とを結ぶ第1方向に対して垂直な第2方向における前記構造体の長さは、前記第2方向における前記第2電極の長さと同じである請求項4記載の装置の製造方法。
- 前記金属層の前記一部が除去された部分及び前記構造体同士の間を通るダイシングラインに沿って、前記基板をダイシングする工程をさらに備えた請求項3〜5のいずれか1つに記載の装置の製造方法。
- 前記構造体同士の距離は、10μm以上1mm以下である請求項2〜6のいずれか1つに記載の装置の製造方法。
- 前記基板は、炭化シリコン、窒化ガリウム、又はガリウムヒ素を含む請求項1〜7のいずれか1つに記載の装置の製造方法。
- 前記フォトレジストを設ける前に、前記構造体が設けられた前記基板の前記第2面側を研磨する工程をさらに備えた請求項1〜8のいずれか1つに記載の装置の製造方法。
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