JP2015144319A - 一時的に接着された半導体ウエハの剥離方法 - Google Patents
一時的に接着された半導体ウエハの剥離方法 Download PDFInfo
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Abstract
【解決手段】亀裂イニシエータを用いて、デバイスウエハとキャリアウエハとの間の接着剤に対し、制御された摂動を提供する。この制御された摂動は、機械的、化学的、熱的、放射的またはそれらの組み合わせとすることができ、デバイスウエハに損傷を与えることなく、2つのウエハの分離を容易にするものである。制御された摂動は、接着層内の界面(例えば、剥離層と接着剤との間)で、またはウエハ/接着剤の界面で、2つのウエハを接合している接着剤に亀裂を発生させる。そして、亀裂を発生させるのに使用された上記方法のいずれかまたはその組み合わせを用いて、亀裂を拡大させることができる。
【選択図】図1C
Description
本出願は、2011年10月27日に出願され、「Debonding Temporary Bonded Semiconductor Wafers」と題された米国仮特許出願第61/552,140号の利益を主張し、参照によってその全体を包含する。この出願は、2011年4月12日に出願され共に係属している、Gregory Georgeによる「Debonding equipment and methods for debonding temporary bonded wafers」と題された米国仮特許出願第13/085,159号の一部継続出願である。同号出願は、2009年4月16日に出願された米国仮特許出願第61/169,753号に基づく優先権を主張して2010年4月15日に出願された、Gregory Georgeらによる「Debonding equipment and methods for debonding temporary bonded wafers」と題された米国特許出願第12/761,014号の一部継続出願である。上記のすべては、参照によってその全体がここに包含される。
図1Aは、接着層108によって一時的にキャリアウエハ104に接着されたデバイスウエハ112の断面図である。本開示の実施形態は、接着層108に、好ましくはデバイスウエハ112またはキャリアウエハ104のいずれかと接着層108との界面で、亀裂を発生(initiate)させて広げ(propagate)、それによって両ウエハを剥離するために使用することができる。
図1Bは、制御された機械的、化学的、熱的、または放射的摂動を用いてウエハ/接着層界面に近接する接着層108の縁部に亀裂(またはひび割れ)を発生させることによって、デバイスウエハ112からキャリアウエハ104を剥離するために使用されるシステム100のハイレベルな実施形態を示している。図1Aに導入された要素に加えて、システム100は、ウエハ支持構造体116、背部保持装置120および亀裂イニシエータ124を含む。
上述したように、亀裂イニシエータ124は、接着層の縁から始まる亀裂を発生および/または拡大するために使用され、好ましくは、接着層108と、キャリアウエハ104またはデバイスウエハ112との間に配置される。亀裂は、ウエハ104および112の制御された剥離プロセスの一部として使用される。図1Dに示すように、制御された剥離工程プロセスでは、亀裂の先縁がほぼ直線形状で進んで行く。亀裂イニシエータ124からの制御された摂動は、例えば、機械的、熱的、化学的、および/または放射的な手段を用いて提供することができる。別の形態では、デバイスウエハ112から電荷を伝えるために亀裂イニシエータ124を使用することができ、それによればデバイスウエハ上の集積回路が静電放電(electro-static discharge)によって損傷するリスクが低減される。
図3A〜図3Eは、亀裂イニシエータ124の種々の断面の平面図(上面図)であり、各イニシエータは異なる先端部を有したものとして示されている。亀裂イニシエータ124およびその先端部は、ウエハ界面での接着層108の破壊特性、および/または、上述したように亀裂を発生および拡大させるために使用される他の1以上の亀裂発生技術に基づいて選択することができる。図示のように、亀裂イニシエータは、丸みを帯びた先端304、尖った先端308平坦な先端312、鋸歯状の先端316、または凹状弓形の先端320に接続することができるシャフト302を含む。シャフト302は、図3A〜図3Eのすべてにおいて同じ幅を持つものとして示されているが、幅を異ならせることもできる。例えば、目的が単に亀裂を発生させることである場合には、幅の狭い亀裂イニシエータを用いることができる。さらに発生後に亀裂を拡大するためにも用いられるのであれば、より幅広の亀裂イニシエータを用いることができる。
Claims (18)
- 接着層によって第1側面がデバイスウエハに一時的に接着されているキャリアウエハから、前記デバイスウエハを剥離するための方法であって、
亀裂イニシエータを用いて摂動を加えることにより前記接着層の縁部近傍で亀裂を開始させることと、
前記キャリアウエハの前記第1側面に直交する制御された力を作用することと、を含み、前記制御された力が、前記デバイスウエハから離れるように前記キャリアウエハの前記第1側面を撓ませることで、亀裂の拡大を制御することを特徴とする方法。 - 前記制御された力は、前記キャリアウエハの前記第1側面の周縁に作用することを特徴とする請求項1に記載の方法。
- 前記デバイスウエハが50μm未満の厚さを有することを特徴とする請求項1に記載の方法。
- 前記デバイスウエハが10μm未満の厚さを有することを特徴とする請求項1に記載の方法。
- 前記デバイスウエハ、前記キャリアウエハおよび前記接着層を含むウエハスタックが1μm未満の全厚変化を有していることを特徴とする請求項1に記載の方法。
- 前記制御された力が前記デバイスウエハから離れるように前記キャリアウエハを撓ませることで、前記亀裂が実質的に直線状の先縁をもって広がることを特徴とする請求項1に記載の方法。
- キャリアウエハからデバイスウエハを剥離するための方法であって、
10μm未満の厚さを有するデバイスウエハに、接着層によってキャリアウエハの第1側面を一時的に接着することと、
亀裂イニシエータを用いて摂動を加えることにより前記接着層の縁部近傍で亀裂を開始させることと、
前記キャリアウエハの第1側面に直交する制御された力を作用することと、を含み、前記制御された力が、前記デバイスウエハから離れるように前記キャリアウエハの前記第1側面を撓ませることで、亀裂の拡大を制御することを特徴とする方法。 - 前記制御された力は、前記キャリアウエハの前記第1側面の周縁に作用することを特徴とする請求項7に記載の方法。
- 前記デバイスウエハが50μm未満の厚さを有することを特徴とする請求項7に記載の方法。
- 前記デバイスウエハが10μm未満の厚さを有することを特徴とする請求項7に記載の方法。
- 前記デバイスウエハ、前記キャリアウエハおよび前記接着層を含むウエハスタックが1μm未満の全厚変化を有していることを特徴とする請求項7に記載の方法。
- 前記制御された力が前記デバイスウエハから離れるように前記キャリアウエハを撓ませることで、前記亀裂が実質的に直線状の先縁をもって広がることを特徴とする請求項7に記載の方法。
- 接着層によって第1側面がデバイスウエハに一時的に接着されているキャリアウエハから、前記デバイスウエハを剥離するための方法であって、
亀裂イニシエータを用いて摂動を加えることにより前記接着層の縁部近傍で亀裂を開始させることと、
(1)前記キャリアウエハの周縁の部位および(2)前記キャリアウエハの前記第1側面の部位で、前記キャリアウエハを背部保持装置に接触させることと、
前記背部保持装置により、前記キャリアウエハの前記第1側面に直交する制御された力を作用することと、を含み、前記制御された力が、前記デバイスウエハから離れるように前記キャリアウエハの前記第1側面を撓ませることで、亀裂の拡大を制御することを特徴とする方法。 - 前記制御された力は、前記キャリアウエハの前記第1側面の周縁に作用することを特徴とする請求項13に記載の方法。
- 前記デバイスウエハが50μm未満の厚さを有することを特徴とする請求項1に記載の方法。
- 前記デバイスウエハが10μm未満の厚さを有することを特徴とする請求項13に記載の方法。
- 前記デバイスウエハ、前記キャリアウエハおよび前記接着層を含むウエハスタックが1μm未満の全厚変化を有していることを特徴とする請求項13に記載の方法。
- 前記制御された力が前記デバイスウエハから離れるように前記キャリアウエハを撓ませることで、前記亀裂が実質的に直線状の先縁をもって広がることを特徴とする請求項13に記載の方法。
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210105993A (ko) * | 2018-12-29 | 2021-08-27 | 크리,인코포레이티드 | 캐리어를 이용하여 레이저 손상 영역을 따라 결정질 물질을 분할하는 방법 |
| KR102611959B1 (ko) | 2018-12-29 | 2023-12-12 | 크리,인코포레이티드 | 캐리어를 이용하여 레이저 손상 영역을 따라 결정질 물질을 분할하는 방법 |
| JP7266344B1 (ja) | 2022-10-11 | 2023-04-28 | 不二越機械工業株式会社 | 剥離装置及び剥離方法 |
| JP2024056159A (ja) * | 2022-10-11 | 2024-04-23 | 不二越機械工業株式会社 | 剥離装置及び剥離方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014534640A (ja) | 2014-12-18 |
| US20150101744A1 (en) | 2015-04-16 |
| KR20140097194A (ko) | 2014-08-06 |
| KR101519312B1 (ko) | 2015-05-15 |
| JP5739588B2 (ja) | 2015-06-24 |
| US9472437B2 (en) | 2016-10-18 |
| US8950459B2 (en) | 2015-02-10 |
| JP6030700B2 (ja) | 2016-11-24 |
| TW201521100A (zh) | 2015-06-01 |
| EP2771904B1 (en) | 2020-10-14 |
| TW201335981A (zh) | 2013-09-01 |
| WO2013063603A3 (en) | 2013-07-11 |
| EP2771904A2 (en) | 2014-09-03 |
| TWI547988B (zh) | 2016-09-01 |
| KR20150046356A (ko) | 2015-04-29 |
| EP2771904A4 (en) | 2015-06-24 |
| WO2013063603A2 (en) | 2013-05-02 |
| US9583374B2 (en) | 2017-02-28 |
| KR101605298B1 (ko) | 2016-03-21 |
| CN103988282A (zh) | 2014-08-13 |
| US20160300747A1 (en) | 2016-10-13 |
| CN103988282B (zh) | 2016-08-17 |
| TWI480943B (zh) | 2015-04-11 |
| US20130048224A1 (en) | 2013-02-28 |
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