JP2005516415A - 半導体素子の製造方法 - Google Patents
半導体素子の製造方法 Download PDFInfo
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- JP2005516415A JP2005516415A JP2003564914A JP2003564914A JP2005516415A JP 2005516415 A JP2005516415 A JP 2005516415A JP 2003564914 A JP2003564914 A JP 2003564914A JP 2003564914 A JP2003564914 A JP 2003564914A JP 2005516415 A JP2005516415 A JP 2005516415A
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- semiconductor layer
- substrate
- support plate
- laser beam
- thermal expansion
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- H01L21/7624—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/12—Passive devices, e.g. 2 terminal devices
- H01L2924/1204—Optical Diode
- H01L2924/12041—LED
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- H01L2924/157—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
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- H01L2924/156—Material
- H01L2924/157—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
- H01L2924/15763—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than 1550 C
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Abstract
Description
a(Al203)=7.5*10−6K−1
を有するサファイア基板に対して、熱膨張係数aTがa(Al203)よりは下であるが、4.125*10−6K−1より大きい、殊に4.5*10−6K−1より大きい支持板材料が有利である。
a(GaN)=4.3*10−6K−1
を有するGaNベース形半導体層のような窒化化合物半導体層の解離の際には殊に、a(GaN)より大きいが、5.8*10−6K−1より小さい、殊に5.6*10−6K−1より小さい熱膨張係数aTを有する支持板材料が有利である。
a(Mo)=5.21*10−6K−1
は例えばa(GaAs)=6.4*10−6K−1を有するGaAsの熱膨張係数よりa(GaN)に著しく接近している。層列体モリブデン−ボンディングウェハ/GaN半導体層/サファイア基板の場合、上述したような、レーザ照射の際のクラック形成の問題は著しく低減されている。モリブデンは更に十分安定しているので、ボンディングの際またはボンディング温度から室温に冷却する際にクラックが生じない。
a(Fe−Ni−Co)=5.1*10−6K−1
を有している。
a(Wo)=4.7*10−6K−1
を有しているタングステンも支持板に対する有利な材料であることが認められている。一般に、金属の支持板材料はその粘り強さに基づいてボンディングプロセスの期間および室温への冷却の期間に極めてクラックし難いことが分かっている。
図1Aないし図1Eは、5つの中間工程に基づいて本発明の方法の第1実施例を略示し、
図2Aおよび図2Bはそれぞれ、本発明の方法の第2実施例の2つの変形形態を略示し、
図3Aおよび図3Bは、図2Aに図示の方法におけるレーザビームのビームプロフィールを略示し、
図4は、図2Aに図示の方法における結果生じる強度分布を略示し、
図5は、本発明の方法の第3実施例を略示し、
図6Aないし図6Cは、ガウス形状の強度分布が使用される場合の製造方法を略示し、
図7は、支持板におけるクラックの生成を説明するための略図であり、
図8は、半導体層におけるクラックの生成を説明するための略図である。
Claims (39)
- 半導体層(2)をレーザビーム(6)を用いた照射によって基板(1)から分離するという半導体素子の製造方法において、
レーザビーム(6)は高原形状の空間的なビームプロフィール(7)を有している
ことを特徴とする方法。 - 半導体層(2)をレーザビーム(6)を用いた照射によって基板(1)から分離するという半導体素子の製造方法において、
レーザビーム(6)をエキシマレーザによって生成する
ことを特徴とする方法。 - エキシマレーザはレーザ活性媒体として希ガス−ハロゲン化合物、例えばXeF,XeBr,XeCl,KrClまたはKrFを含んでいる
請求項1または2記載の方法。 - レーザビーム(6)は高原形状の空間的なビームプロフィール(7)を有している
請求項2または3記載の方法。 - レーザビーム(6)は矩形形状または台形形状の空間的なビームプロフィールを有している
請求項1から4までのいずれか1項記載の方法。 - レーザビーム(6)をレーザによってパルス作動において生成する
請求項1から5までのいずれか1項記載の方法。 - レーザビーム(6)の波長は200nmと400nmとの間にある
請求項1から6までのいずれか1項記載の方法。 - レーザビーム(6)は、照射される領域内でレーザビーム(6)によって生成されるエネルギー密度が100mJ/cm3と1000mJ/cm3との間、例えば150mJ/cm3と800mJ/cm3との間にあるように、半導体層(2)に集束する
請求項1から7までのいずれか1項記載の方法。 - 半導体層(2)の複数の個別領域(8)を順次照射する
請求項1から8までのいずれか1項記載の方法。 - 個別領域(8)は、照射される半導体層(2)の主要な部分に対して時間的に積分されて空間的に近似的に一定の強度分布(10)が生じるように面を充填して配置されている
請求項9記載の方法。 - レーザビーム(6)は半導体層(2)のところで、長手方向寸法(a)および横断方向寸法(b)を有するビーム面を有しており、ここで長手方向寸法(a)は横断方向寸法(b)より大きく、かつ
半導体層(2)は横断方向寸法(b)の方向に沿った照射の期間にレーザビーム(6)に対して相対的に移動される
請求項1から10までのいずれか1項記載の方法。 - 基板(1)はレーザビーム(6)に対して少なくとも部分的に透過性でありかつ
半導体層(2)を基板(2)を通して照射する
請求項1から11までのいずれか1項記載の方法。 - 半導体層(2)をレーザビーム(6)を用いた照射によって基板(1)から分離するという半導体素子の製造方法において、
基板(1)の分離の前に、半導体層(2)を基板(1)とは反対側で支持板(4)に被着させる、有利にははんだ付けする
ことを特徴とする方法。 - レーザビーム(6)はパルス化されている
請求項13記載の方法。 - 支持板の熱膨張係数aTをビームプロフィールおよび/またはレーザビームパルスのパルス長および半導体層の熱膨張係数aHLおよび基板の熱膨張係数aSに合わせて選択して、製造の期間に基板、半導体層および支持板間のストレスが低減されるようにする
請求項13または14記載の方法。 - 支持板の熱膨張係数aTを基板の熱膨張係数aSよりも半導体層の熱膨張係数aHLに近接して選択する
請求項15記載の方法。 - 支持板の熱膨張係数aTは基板の熱膨張係数aSとは45%またはそれ以下、有利には40%またはそれ以下だけ相異している
請求項15または16記載の方法。 - 支持板の熱膨張係数aTは半導体層の熱膨張係数aHLとは35%またはそれ以下、有利には25%またはそれ以下だけ相異している
請求項15から17までのいずれか1項記載の方法。 - 支持板は約4.3*10−6K−1と約5.9*10−6K−1との間、有利には約4.6*10−6K−1と約5.3*10−6K−1との間にある熱膨張係数を有している
請求項15から18までのいずれか1項記載の方法。 - 支持板(4)は砒化ガリウム、シリコン、銅、鉄、ニッケルおよび/またはコバルトを含んでいる
請求項13から19までのいずれか1項記載の方法。 - 支持板はモリブデンを含んでいる
請求項13から20までのいずれか1項記載の方法。 - 支持板は鉄−ニッケル−コバルト合金を含んでいる
請求項13から21までのいずれか1項記載の方法。 - 支持板はタングステンを含んでいる
請求項13から22までのいずれか1項記載の方法。 - 支持板はゲルマニウムを含んでいる
請求項13から23までのいずれか1項記載の方法。 - 半導体層の、基板からの分離のために、レーザビームパルスの大きなパルス長、例えば15nsより大きなパルス長を選択する
請求項14から24までのいずれか1項記載の方法。 - 支持板の熱膨張係数aTは半導体層の熱膨張係数aHLとは35%またはそれ以上異なっており、かつ
半導体層の、基板からの分離のために、レーザビームパルスの小さなパルス長、例えば15nsより小さなパルス長を選択する
請求項15から25までのいずれか1項記載の方法。 - 半導体層(2)を、金および/または錫またはパラジウムおよび/またはインジウムを含んでいるはんだを用いて支持板(4)にはんだ付けする
請求項13から26までのいずれか1項記載の方法。 - 半導体層(2)を支持板(4)に接続する前に、半導体層(2)の、支持板(4)とは反対の側に金属化部を被着する
請求項13から27までのいずれか1項記載の方法。 - 金属化部は金および/または白金を含んでいる
請求項28記載の方法。 - 半導体層(2)は複数の個別層から成っている
請求項1から29までのいずれか1項記載の方法。 - 半導体層(2)ないし半導体層の少なくとも1つは窒化化合物半導体を含んでいる
請求項1から30までのいずれか1項記載の方法。 - 窒化化合物半導体層は第3族および/または第5族の元素の窒化化合物である
請求項31記載の方法。 - 半導体層(2)ないし個別層の少なくとも1つは、0≦x≦1,0≦y≦1およびx+y≦1を有するInxAlyGa1−x−yN、例えばGaN,AlGaN,InGaN,AlInGaN,AlNまたはInNwi含んでいる
請求項31または32に記載の方法。 - 基板(1)はシリコン、シリコンカーバイドまたは酸化アルミニウム、例えばサファイアを含んでいる
請求項1から33までのいずれか1項記載の方法。 - 半導体層(2)を請求項1から12までのいずれか1項記載の方法を用いて基板(1)から分離する
請求項13から34までのいずれか1項記載の方法。 - 半導体層(2)をエピタキシー方法を用いて基板(1)に被着する
請求項1から23までのいずれか1項記載の方法。 - 半導体層(2)は。50μmより小さいかまたはそれに等しい厚さを有している
請求項1から36までのいずれか1項記載の方法。 - 半導体素子は、成長する半導体層からその成長後に基板が少なくとも部分的に除去される薄膜素子である
請求項1から37までのいずれか1項記載の方法。 - 半導体素子は光電素子、例えばルミネセンスダイオードのような放射生成素子である
請求項1から38までのいずれか1項記載の方法。
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Also Published As
Publication number | Publication date |
---|---|
EP1470573B1 (de) | 2020-07-01 |
US8598014B2 (en) | 2013-12-03 |
WO2003065420A2 (de) | 2003-08-07 |
US20090311847A1 (en) | 2009-12-17 |
TWI226139B (en) | 2005-01-01 |
JP5073915B2 (ja) | 2012-11-14 |
US20050239270A1 (en) | 2005-10-27 |
EP1470573A2 (de) | 2004-10-27 |
US8575003B2 (en) | 2013-11-05 |
US7588998B2 (en) | 2009-09-15 |
US20120040484A1 (en) | 2012-02-16 |
WO2003065420A3 (de) | 2004-07-08 |
TW200305293A (en) | 2003-10-16 |
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