JP2021521634A - 平坦な接合面を有するledバックプレーンおよびその製造方法 - Google Patents
平坦な接合面を有するledバックプレーンおよびその製造方法 Download PDFInfo
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Abstract
Description
Claims (20)
- 発光デバイスアセンブリであって、
金属相互接続構造を含む基板を含むバックプレーンと、
前記基板よりも低い弾性率を有する絶縁材料部であって、前記絶縁材料部は、前記バックプレーンを覆うように位置し、前記絶縁材料部の平坦な上面領域が同じ水平面内に位置するように、それぞれ前記平坦な上面領域を含む、前記絶縁材料部と、
金属プレートクラスタの2次元アレイであって、前記金属プレートクラスタの各々は、複数の金属プレートを含み、各金属プレートは、絶縁材料部の平坦な上面領域のそれぞれの上にある水平金属プレート部と、前記水平金属プレート部と前記金属相互接続構造のそれぞれとの間に延在する接続金属部と、を含む、前記金属プレートクラスタの2次元アレイと、
それぞれの接合構造を通して前記バックプレーンに接合された発光デバイスクラスタの2次元アレイであって、各発光デバイスクラスタは、金属プレートクラスタのそれぞれの上にある複数の発光デバイスを含む、前記発光デバイスクラスタの2次元アレイと、
を含むことを特徴とする発光デバイスアセンブリ。 - 前記発光デバイスの遠位面の上に位置する不規則な表面の高さの変動を有する化合物半導体材料部をさらに含み、前記遠位面が前記バックプレーンとは反対を向く前記発光デバイスの表面であることを特徴とする請求項1に記載の発光デバイスアセンブリ。
- 前記接合構造が、前記金属プレートクラスタの2次元アレイの上に位置するバックプレーン側接合パッドの2次元アレイを含み、前記バックプレーン側接合パッドの各々が、前記水平金属プレート部のそれぞれの上に位置することを特徴とする請求項1に記載の発光デバイスアセンブリ。
- 前記発光デバイスクラスタの2次元アレイ内の前記発光デバイスの各々は、はんだ材料部を通して前記バックプレーン側接合パッドのそれぞれに接合されたデバイス側接合パッドを含むことを特徴とする請求項3に記載の発光デバイスアセンブリ。
- 前記金属相互接続構造は、前記金属相互接続構造が存在しないギャップ領域の矩形の2次元アレイを提供するように配され、
前記絶縁材料部は、前記ギャップ領域の各々を覆うように位置し、
前記複数の金属プレートは、前記ギャップ領域のそれぞれの上にあることを特徴とする請求項1に記載の発光デバイスアセンブリ。 - 各発光デバイスクラスタが、直視型ディスプレイデバイスの画素を含むことを特徴とする請求項1に記載の発光デバイスアセンブリ。
- 前記発光デバイスクラスタの2次元アレイが、前記金属プレートクラスタの2次元アレイと同じ2次元周期性を有し、
前記接続金属部の各々は、前記絶縁材料部のそれぞれのテーパー状の側壁または垂直な側壁、および、金属相互接続構造のそれぞれの上面に接触することを特徴とする請求項1に記載の発光デバイスアセンブリ。 - 前記絶縁材料部は、互いに直接接触せず、前記金属プレートクラスタの2次元アレイと同じ2次元周期性を有する絶縁メサ構造の2次元アレイとして配されることを特徴とする請求項7に記載の発光デバイスアセンブリ。
- 前記絶縁材料部は、前記バックプレーンの上面を覆う連続絶縁材料層の一部であり、
各接続金属部は、それぞれの開口を通り、前記連続絶縁材料層を通り延在することを特徴とする請求項7に記載の発光デバイスアセンブリ。 - 前記バックプレーンの前記基板は、第1弾性率を有する第1誘電体材料を含み、
前記絶縁材料部は、前記バックプレーンの前記基板の上に位置し、前記第1弾性率の80%未満の第2弾性率を有する第2誘電体材料を含むことを特徴とする請求項1に記載の発光デバイスアセンブリ。 - 発光デバイスアセンブリを形成する方法であって、
金属相互接続構造を含む基板を含むバックプレーンを提供することと、
前記バックプレーンを覆うように、それぞれ平坦な上面領域を含む絶縁材料部を形成することであって、前記絶縁材料部の前記平坦な上面領域が、同じ水平面内である、ことと、
前記絶縁材料部を覆うように、金属プレートクラスタの2次元アレイを形成することであって、前記金属プレートクラスタの各々は、複数の金属プレートを含み、各金属プレートは、絶縁材料部の平坦な上面領域のそれぞれの上にある水平金属プレート部と、前記水平金属プレート部と金属相互接続構造のそれぞれとの間に延在する接続金属部と、を含む、ことと、
発光デバイスクラスタの2次元アレイを、それぞれの接合構造を通して前記バックプレーンに接合することであって、各発光デバイスクラスタが、金属プレートクラスタのそれぞれの上にある複数の発光デバイスを含む、ことと、
を含むことを特徴とする方法。 - 前記絶縁材料部が、前記基板よりも低い弾性率を有し、
各発光デバイスクラスタが、直視型ディスプレイデバイスの画素を含むことを特徴とする請求項11に記載の方法。 - 前記絶縁材料部が、前記バックプレーンの非平坦な上面を覆うように、平坦な水平上面を有する連続絶縁材料層を形成することと、それを通る少なくとも1つの開口を形成することによって前記連続絶縁材料層をパターニングすることと、によって形成され、前記金属相互接続構造の上面は物理的に露出し、前記連続絶縁材料層の残る部分は前記絶縁材料部を含み、
前記金属プレートクラスタの2次元アレイが、前記絶縁材料部を覆うように、前記金属相互接続構造の物理的に露出した上面の上に連続金属層を堆積し、前記連続金属層をパターニングすることによって形成され、前記連続金属層のパターニングされた部分のセットは、前記金属プレートクラスタの2次元アレイを含み、前記連続金属層のパターニングされた部分の各セットは、絶縁材料部のそれぞれの上にあり、金属プレートクラスタを構成することを特徴とする請求項11に記載の方法。 - 前記接続金属部の各々は、前記絶縁材料部のそれぞれのテーパー状の側壁または垂直な側壁、および、金属相互接続構造のそれぞれの上面の上に、直接形成されることを特徴とする請求項13に記載の方法。
- 前記絶縁材料部は、互いに直接接触せず、前記金属プレートクラスタの2次元アレイと同じ2次元周期性を有する絶縁メサ構造の2次元アレイとして配されることを特徴とする請求項14に記載の方法。
- 前記絶縁材料部は、前記バックプレーンの上面を覆う連続絶縁材料層の一部であり、
各接続金属部は、それぞれの開口を通り、前記連続絶縁材料層を通り延在することを特徴とする請求項14に記載の方法。 - 前記金属プレートクラスタの2次元アレイの上にバックプレーン側接合パッドの2次元アレイを形成することをさらに含み、前記バックプレーン側接合パッドの各々が、前記水平金属プレート部のそれぞれの上に形成されることを特徴とする請求項11に記載の方法。
- それぞれデバイス側接合パッドを含み第1ピーク波長で光を放射する第1発光デバイスが取り付けられた第1ソース基板を提供することと、
第1はんだ材料部を通して前記第1発光デバイスの前記デバイス側接合パッドが前記バックプレーン側接合パッドに対向するように、その間に前記第1はんだ材料部を備える前記バックプレーンを覆うように、前記第1ソース基板を配することと、
前記第1はんだ材料部のサブセットの選択的なリフローによって、前記第1発光デバイスのすべてではないが、サブセットを接合することと、
前記第1ソース基板と前記バックプレーンに接合された各第1発光デバイスとの間に位置する化合物半導体材料へのレーザアブレーションを使用し、それぞれリフローされ、再凝固したはんだ材料部を通し前記バックプレーンに接合された各第1発光デバイスを解離することと、
前記バックプレーンのアセンブリと、それに接合されたすべての第1発光デバイスのセットと、を、前記第1ソース基板のアセンブリおよび前記バックプレーンに接合されないすべての第1発光デバイスのセットから分離することと、
それぞれデバイス側接合パッドを含み第2ピーク波長で光を放射する第2発光デバイスが取り付けられた第2ソース基板を提供することと、
第2はんだ材料部を通して前記第2発光デバイスの前記デバイス側接合パッドが前記バックプレーン側接合パッドに対向するように、その間に前記第2はんだ材料部を備える前記バックプレーンを覆うように、前記第2ソース基板を配することと、
前記第2はんだ材料部のサブセットの選択的なリフローによって、前記第2発光デバイスのすべてではないが、サブセットを接合することと、
をさらに含むことを特徴とする請求項17に記載の方法。 - 前記バックプレーンを通して、または、前記第1発光デバイスおよび前記第2発光デバイスを通して、前記第1はんだ材料部および前記第2はんだ材料部のサブセットのそれぞれへのレーザ照射を使用し、前記第1発光デバイスおよび前記第2発光デバイスが、前記バックプレーンに接合されることを特徴とする請求項18に記載の方法。
- 前記第1はんだ材料部および前記第2はんだ材料部のサブセットのそれぞれへの順次の熱リフローを使用し、前記第1発光デバイスおよび前記第2発光デバイスが、前記バックプレーンに接合されることを特徴とする請求項18に記載の方法。
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