JP7298195B2 - 光モジュール及びその製造方法 - Google Patents
光モジュール及びその製造方法 Download PDFInfo
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- JP7298195B2 JP7298195B2 JP2019039752A JP2019039752A JP7298195B2 JP 7298195 B2 JP7298195 B2 JP 7298195B2 JP 2019039752 A JP2019039752 A JP 2019039752A JP 2019039752 A JP2019039752 A JP 2019039752A JP 7298195 B2 JP7298195 B2 JP 7298195B2
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- electrode pads
- conductive material
- conductive
- semiconductor chip
- electrode pad
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- H01L25/167—Assemblies consisting of a plurality of semiconductor or other solid state devices the devices being of types provided for in two or more different subclasses of H10B, H10D, H10F, H10H, H10K or H10N, e.g. forming hybrid circuits comprising optoelectronic devices, e.g. LED, photodiodes
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- G—PHYSICS
- G02—OPTICS
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- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/12004—Combinations of two or more optical elements
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- G02B6/13—Integrated optical circuits characterised by the manufacturing method
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Description
まず、第1の実施形態について説明する。図1は、第1の実施形態に係る光モジュールの構成を示すブロック図である。図1中の実線の矢印は電気信号が伝送される方向を示し、破線は光信号が伝送される方向を示す。
次に、第2の実施形態について説明する。第2の実施形態は、光半導体チップ200と配線基板100との間の導電材の構成の点で第1の実施形態と相違する。図5Aは、第2の実施形態に係る光モジュールの構造を示す断面図である。図5Aには、第1の実施形態の図3A中のI-I線に沿った断面に相当する断面のうち、光半導体チップ200が設けられた部分を示す。図5Bは、第2の実施形態における、配線基板、導電材及びアンダーフィルの関係を示す図である。
第1の電極パッドと、第2の電極パッドと、前記第1の電極パッドと前記第2の電極パッドとの間に配置された第3の電極パッドと、を備えた光半導体チップと、
第4の電極パッドと、第5の電極パッドと、前記第4の電極パッドと前記第5の電極パッドとの間に配置された第6の電極パッドと、備え、前記光半導体チップがフリップチップ実装された配線基板と、
前記第1の電極パッドと前記第4の電極パッドとを接続する第1の導電材と、
前記第2の電極パッドと前記第5の電極パッドとを接続する第2の導電材と、
前記第1の導電材と前記第2の導電材との間に配置され、前記第3の電極パッドと前記第6の電極パッドとを接続する第3の導電材と、
前記光半導体チップと前記配線基板との間で、前記第3の導電材の前記第2の導電材側に設けられた樹脂と、
を有することを特徴とする光モジュール。
(付記2)
前記光半導体チップは、前記第3の電極パッドを複数有し、
前記配線基板は、前記第6の電極パッドを複数有し、
前記第3の導電材は、複数の前記第3の電極パッドと複数の前記第6の電極パッドとを接続していることを特徴とする付記1に記載の光モジュール。
(付記3)
前記第2の導電材は前記樹脂に接触し、前記第1の導電材は前記樹脂に非接触であることを特徴とする付記1又は2に記載の光モジュール。
(付記4)
前記第1の導電材及び前記第2の導電材はコア材を有することを特徴とする付記1乃至3のいずれか1項に記載の光モジュール。
(付記5)
前記配線基板は、前記第4の電極パッドに接続されたコプレーナ線路を有することを特徴とする付記1乃至4のいずれか1項に記載の光モジュール。
(付記6)
前記第1の導電材を介して伝送される信号の第1の速度が、前記第2の導電材を介して伝送される信号の第2の速度よりも速いことを特徴とする付記1乃至5のいずれか1項に記載の光モジュール。
(付記7)
前記第3の電極パッド、前記第6の電極パッド及び前記第3の導電材は接地されることを特徴とする付記1乃至6のいずれか1項に記載の光モジュール。
(付記8)
前記第1の導電材を介して伝送される信号の周波数が最大30GHz以上であることを特徴とする付記1乃至7のいずれか1項に記載の光モジュール。
(付記9)
第1の電極パッドと、第2の電極パッドと、前記第1の電極パッドと前記第2の電極パッドとの間に配置された第3の電極パッドと、を備えた光半導体チップを準備する工程と、
第4の電極パッドと、第5の電極パッドと、前記第4の電極パッドと前記第5の電極パッドとの間に配置された第6の電極パッドと、備え、前記光半導体チップがフリップチップ実装された配線基板を準備する工程と、
前記第1の電極パッドと前記第4の電極パッドとを接続する第1の導電材を形成する工程と、
前記第2の電極パッドと前記第5の電極パッドとを接続する第2の導電材を形成する工程と、
前記第1の導電材と前記第2の導電材との間に、前記第3の電極パッドと前記第6の電極パッドとを接続する第3の導電材を形成する工程と、
前記光半導体チップと前記配線基板との間で、前記第3の導電材の前記第2の導電材側に樹脂を形成する工程と、
を有することを特徴とする光モジュールの製造方法。
(付記10)
前記光半導体チップは、前記第3の電極パッドを複数有し、
前記配線基板は、前記第6の電極パッドを複数有し、
前記第3の導電材により、複数の前記第3の電極パッドと複数の前記第6の電極パッドとを接続することを特徴とする付記9に記載の光モジュールの製造方法。
(付記11)
前記樹脂を、前記第2の導電材に接触し、前記第1の導電材には非接触となるように形成することを特徴とする付記9又は10に記載の光モジュールの製造方法。
(付記12)
前記第1の導電材及び前記第2の導電材はコア材を有することを特徴とする付記9乃至11のいずれか1項に記載の光モジュールの製造方法。
(付記13)
前記配線基板は、前記第4の電極パッドに接続されたコプレーナ線路を有することを特徴とする付記9乃至12のいずれか1項に記載の光モジュールの製造方法。
(付記14)
前記第1の導電材を介して伝送される信号の第1の速度が、前記第2の導電材を介して伝送される信号の第2の速度よりも速いことを特徴とする付記9乃至13のいずれか1項に記載の光モジュールの製造方法。
(付記15)
前記第3の電極パッド、前記第6の電極パッド及び前記第3の導電材は接地されることを特徴とする付記9乃至14のいずれか1項に記載の光モジュールの製造方法。
(付記16)
前記第1の導電材を介して伝送される信号の周波数が最大30GHz以上であることを特徴とする付記9乃至15のいずれか1項に記載の光モジュールの製造方法。
100:配線基板
120H、120L、120G、240H、240L、240G:電極パッド
190:アンダーフィル
200:光半導体チップ
620A、629:半田ペースト
620C、625:半田ボール
620H、620L、620G、620GW、625H、625L、625G:導電材
621H、621L、621G:コア材
Claims (6)
- 複数の第1の電極パッドと、複数の第2の電極パッドと、前記複数の第1の電極パッドと前記複数の第2の電極パッドとの間に配置された複数の第3の電極パッドと、を備えた光半導体チップと、
複数の第4の電極パッドと、複数の第5の電極パッドと、前記複数の第4の電極パッドと前記複数の第5の電極パッドとの間に配置された複数の第6の電極パッドと、備え、前記光半導体チップがフリップチップ実装された配線基板と、
それぞれ、前記複数の第1の電極パッドのうちの一つと前記複数の第4の電極パッドのうちの一つとを接続する複数の第1の導電材と、
それぞれ、前記複数の第2の電極パッドのうちの一つと前記複数の第5の電極パッドのうちの一つとを接続する複数の第2の導電材と、
前記複数の第1の導電材と前記複数の第2の導電材との間に配置された1又は2以上の第3の導電材と、
前記光半導体チップと前記配線基板との間で、前記第3の導電材の前記第2の導電材側に設けられた樹脂と、
を有し、
前記第2の導電材は前記樹脂に接触し、前記第1の導電材は前記樹脂に非接触であり、
前記光半導体チップは、前記第3の導電材の前記第1の導電材側に設けられた複数の第7の電極パッドを有し、
前記配線基板は、前記第3の導電材の前記第1の導電材側に設けられた複数の第8の電極パッドを有し、
前記第3の導電材の前記第1の導電材側に設けられ、それぞれ、前記複数の第7の電極パッドのうちの一つと前記複数の第8の電極パッドのうちの一つとを接続する複数の第4の導電材を有し、
前記1又は2以上の第3の導電材の各々は、前記複数の第3の電極パッドと前記複数の第6の電極パッドとを接続し、
前記第1の導電材を介して伝送される信号の第1の速度が、前記第2の導電材を介して伝送される信号の第2の速度よりも速く、
前記複数の第1の導電材、前記複数の第2の導電材及び前記第4の導電材のうちの同一直線上にない少なくとも3個で、すべてではない導電材はコア材を有し、
前記コア材の融点は半田の融点よりも高いことを特徴とする光モジュール。 - 前記配線基板は、前記第4の電極パッドに接続されたコプレーナ線路を有することを特徴とする請求項1に記載の光モジュール。
- 前記第3の電極パッド、前記第6の電極パッド及び前記第3の導電材は接地されることを特徴とする請求項1又は2に記載の光モジュール。
- 前記コア材を有する少なくとも3個の導電材の数は、前記第3の導電材の前記第1の導電材側において、前記第3の導電材の前記第2の導電材側よりも少ないことを特徴とする請求項1乃至3のいずれか1項に記載の光モジュール。
- 複数の第1の電極パッドと、複数の第2の電極パッドと、前記複数の第1の電極パッドと前記複数の第2の電極パッドとの間に配置された複数の第3の電極パッドと、を備えた光半導体チップを準備する工程と、
複数の第4の電極パッドと、複数の第5の電極パッドと、前記複数の第4の電極パッドと前記複数の第5の電極パッドとの間に配置された複数の第6の電極パッドと、備え、前記光半導体チップがフリップチップ実装された配線基板を準備する工程と、
それぞれ、前記複数の第1の電極パッドのうちの一つと前記複数の第4の電極パッドのうちの一つとを接続する複数の第1の導電材を形成する工程と、
それぞれ、前記複数の第2の電極パッドのうちの一つと前記複数の第5の電極パッドのうちの一つとを接続する複数の第2の導電材を形成する工程と、
前記複数の第1の導電材と前記複数の第2の導電材との間に、1又は2以上の第3の導電材を形成する工程と、
前記光半導体チップと前記配線基板との間で、前記第3の導電材の前記第2の導電材側に樹脂を、前記第2の導電材に接触し、前記第1の導電材には非接触となるように形成する工程と、
を有し、
前記光半導体チップは、前記第3の導電材の前記第1の導電材側に設けられる複数の第7の電極パッドを有し、
前記配線基板は、前記第3の導電材の前記第1の導電材側に設けられる複数の第8の電極パッドを有し、
前記第3の導電材の前記第1の導電材側に、それぞれ、前記複数の第7の電極パッドのうちの一つと前記複数の第8の電極パッドのうちの一つとを接続する複数の第4の導電材を形成する工程を有し、
前記1又は2以上の第3の導電材の各々は、前記複数の第3の電極パッドと前記複数の第6の電極パッドとを接続し、
前記第1の導電材を介して伝送される信号の第1の速度が、前記第2の導電材を介して伝送される信号の第2の速度よりも速く、
前記複数の第1の導電材、前記複数の第2の導電材及び前記第4の導電材のうちの同一直線上にない少なくとも3個で、すべてではない導電材はコア材を有し、
前記コア材の融点は半田の融点よりも高いことを特徴とする光モジュールの製造方法。 - 前記コア材を有する少なくとも3個の導電材の数は、前記第3の導電材の前記第1の導電材側において、前記第3の導電材の前記第2の導電材側よりも少ないことを特徴とする請求項5に記載の光モジュールの製造方法。
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