JP6186016B2 - 基板に貫通穴を開ける方法及び装置 - Google Patents
基板に貫通穴を開ける方法及び装置 Download PDFInfo
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Description
Claims (28)
- 光学系を用いて、パルス継続時間(t)を有するパルスレーザー光線(3)により、特に平坦な基板(2)に複数の穴(5)を開ける方法であって、基板(2)の基板材料が、レーザー波長に関して、少なくとも部分的に透過性であり、このレーザー光線(3)が、焦点距離(f1)を有する光学系を用いて収束され、このレーザー光線(3)の強度が、レーザー光線(3)の光線軸(Z)に沿って基板(2)の改変を生じさせるが、材料を貫通する浸食を生じさせず、そのため、その次の工程において、主に事前にレーザー光線(3)を用いて改変を受けた領域で異方性材料浸食が行なわれ、そのようにして、穴(5)を基板(2)に開ける方法において、
単一パルス(P)のパルス継続時間(t)内における同じ変更されない光学系による非線形自己収束によって、当初の焦点距離(f1)と異なる焦点距離(f2)にレーザー光線(3)を収束させ、この焦点距離(f2)と当初の焦点距離(f1)の間の差が、開けるべき穴(5)の領域における基板(2)の厚さよりも大きく、このパルスレーザー光線(3)の単一パルス(P)の強度(I)が、単一パルスの時間的な推移に関して、最小値(I a )から最大値(I c )にまで上昇した後下降する強度を有し、この光学系の焦点距離が、その収束光学系により決まる幾何学的な焦点位置に関係無く、この強度に依存して設定可能であることを特徴とする方法。 - 当該の焦点距離(f2)が当初の焦点距離(f1)よりも短いことを特徴とする請求項1に記載の方法。
- 基板(2)が、主な材料成分として、ガラス、サファイア及びシリコンの中の一つ以上を有することを特徴とする請求項1又は2に記載の方法。
- 当該の異方性材料浸食が、フッ化水素酸でのエッチングにより行なわれることを特徴とする請求項1から3までの少なくとも一つに記載の方法。
- 基板(2)が、レーザー照射前に、少なくとも片側にエッチング用レジスト(7)をコーティングされることを特徴とする請求項1から4までの少なくとも一つに記載の方法。
- 基板(2)が、レーザー照射前に、少なくとも一つの表面にエッチング用レジスト(7)を平坦にコーティングされることと、
レーザー光線(3)の作用によって、点形状の作用ゾーンにおいて、エッチング用レジスト(7)を浸食すると同時に、少なくとも一つの表面において、基板(2)に改変を生じさせることと、
を特徴とする請求項5に記載の方法。 - エッチング用レジスト(7)が、異方性材料の浸食後に、基板(2)の表面から取り除かれることを特徴とする請求項5又は6に記載の方法。
- 基板(2)が、少なくとも片側に金属をコーティングされることを特徴とする請求項1から7までの少なくとも一つに記載の方法。
- 基板(2)が、特に、改変後に、幾つかの、特に、多数のその後に開けるべき穴(5)及び/又は貫通穴を覆う平坦な金属層(6)を配備されることと、
それに続く工程で、改変された領域(4)が浸食されて、その結果、その金属層(6)により片側を閉鎖された穴(5)が作り出されることと、
を特徴とする請求項8に記載の方法。 - 当該の光学系の開口数(NA)が0.3以上、特に、0.4以上であることを特徴とする請求項1から9までの少なくとも一つに記載の方法。
- レーザー光線(3)が、先ず透過性媒体(8)を通過するように偏向され、この透過性媒体(8)が、空気よりも大きな強度依存屈折率を有することを特徴とする請求項1から10までの少なくとも一つに記載の方法。
- レーザー光線(3)が、光学系の強く収束するサブシステムと、空気よりも大きな強度依存屈折率(n2)を有する、光学系のレーザー光線(3)の波長に対する透過性材料とを通過するように偏向されることを特徴とする請求項1から11までの少なくとも一つに記載の方法。
- 当該の透過性材料が、主な材料成分として、サファイアを有することを特徴とする請求項12に記載の方法。
- レーザー光線(3)が、基板(2)の光学系と反対の後側(11)に隣接した、焦点距離(f1)を有する焦点(9a,9b,9c)に向けられることを特徴とする請求項1から13までの少なくとも一つに記載の方法。
- レーザー光線(3)が、単一パルス(P)のパルス継続時間(t)の間に各焦点(9a,9b,9c)に偏向されることを特徴とする請求項1から14までの少なくとも一つに記載の方法。
- レーザー光線(3)が基板(2)に作用している間、基板(2)が、特に、絶え間無く、レーザー光線(3)及び/又はレーザー処理ヘッド(10)に対して相対的に動かされることを特徴とする請求項1から15までの少なくとも一つに記載の方法。
- 光学系が、一様な相対速度で基板(2)に対して相対的に動かされることによって、複数の穴(5)が作り出されることを特徴とする請求項1から16までの少なくとも一つに記載の方法。
- レーザー光線(3)によって、更に、当該の穴(5)の表面領域も浸食されることを特徴とする請求項1から17までの少なくとも一つに記載の方法。
- レーザー光線(3)のパルス継続時間(t)が50ps以下、有利には、20ps以下であることを特徴とする請求項1から18までの少なくとも一つに記載の方法。
- パルスレーザーのレーザー光線(3)が、透過性媒体(8)を通過するとともに、特に連続放射レーザーのレーザー光線が、透過性媒体(8)を通過して、或いは透過性媒体(8)を迂回して基板(2)に向けられることを特徴とする請求項1から19までの少なくとも一つに記載の方法。
- 異方性材料浸食によって、外側表面(11,12)の間の貫通穴として、穴(5)を基板(2)に開けることを特徴とする請求項1から20までの少なくとも一つに記載の方法。
- パルス継続時間(t)を有するパルスレーザー光線(3)を基板(2)に偏向するレーザー処理ヘッド(10)を備えた光学系を有する、請求項1から22までの少なくとも一つに記載の方法を実施して基板(2)に複数の穴(5)を開ける装置であって、
空気よりも大きな強度依存屈折率を有する特に面平行な透過性媒体(8)が、この透過性媒体(8)を通過してレーザー光線(3)を基板(2)に偏向可能なように、レーザー処理ヘッド(10)と基板(2)の間に配置されている装置において、
本装置は、単一パルス(P)のパルス継続時間(t)内における同じ変更されない光学系による非線形自己収束によって、当初の焦点距離(f1)と異なる焦点距離(f2)にレーザー光線(3)を収束させ、この焦点距離(f2)と当初の焦点距離(f1)の間の差が、開けるべき穴(5)の領域における基板(2)の厚さよりも大きくなり、このパルスレーザー光線(3)の単一パルス(P)の強度(I)が、単一パルスの時間的な推移に関して、最小値(I a )から最大値(I c )にまで上昇した後下降する強度を有し、この光学系の焦点距離が、その収束光学系により決まる幾何学的な焦点位置に関係無く、この強度に依存して設定可能であるように構成されていることを特徴とする装置。 - レーザー光線(3)が、基板(2)のレーザー処理ヘッド(10)と反対の後側(11)に対して間隔を開けた焦点(9a,9b,9c)に偏向可能であることを特徴とする請求項22に記載の装置。
- レーザー光線(3)のパルス継続時間(t)が50ps以下、特に、20ps以下であることを特徴とする請求項22又は23に記載の装置。
- 当該の透過性媒体(8)が、ガラス、特に、水晶ガラスとサファイアとの中の一つ以上から構成されることを特徴とする請求項22から24までの少なくとも一つに記載の装置。
- 当該の透過性媒体(8)が、レーザー処理ヘッド(10)と連結され、その処理ヘッドと一緒に移動可能に配置されていることを特徴とする請求項22から25までの少なくとも一つに記載の装置。
- 本装置が、パルスレーザーと連続照射レーザーに接続されていることを特徴とする請求項22から26までの少なくとも一つに記載の装置。
- 当該の光学系の開口数(NA)が0.3以上であることを特徴とする請求項22から27までの少なくとも一つに記載の装置。
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WO2014161534A2 (de) | 2014-10-09 |
US20200189039A1 (en) | 2020-06-18 |
KR20150128802A (ko) | 2015-11-18 |
JP2016517626A (ja) | 2016-06-16 |
EP2964417B1 (de) | 2022-01-12 |
US11618104B2 (en) | 2023-04-04 |
US20160059359A1 (en) | 2016-03-03 |
EP2964417A2 (de) | 2016-01-13 |
CN105102177B (zh) | 2018-02-27 |
LT2964417T (lt) | 2022-04-11 |
ES2908956T3 (es) | 2022-05-04 |
MY178429A (en) | 2020-10-13 |
CN105102177A (zh) | 2015-11-25 |
WO2014161534A3 (de) | 2014-11-27 |
KR101857335B1 (ko) | 2018-05-11 |
US20230201970A1 (en) | 2023-06-29 |
US10610971B2 (en) | 2020-04-07 |
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