JP7477835B2 - 半導体チップの製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims description 79
- 238000004519 manufacturing process Methods 0.000 title claims description 32
- 230000015572 biosynthetic process Effects 0.000 claims description 49
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 44
- 230000004075 alteration Effects 0.000 claims description 40
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 23
- 230000006866 deterioration Effects 0.000 claims description 19
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 229910002601 GaN Inorganic materials 0.000 claims description 9
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 9
- 229910052733 gallium Inorganic materials 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 8
- 230000002950 deficient Effects 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims description 4
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 description 17
- 239000002184 metal Substances 0.000 description 17
- 239000000853 adhesive Substances 0.000 description 12
- 230000001070 adhesive effect Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 239000000758 substrate Substances 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005224 laser annealing Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
- B23K26/0648—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising lenses
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Description
第1実施形態について、図面を参照しつつ説明する。以下では、GaNを含むチップ構成基板110に半導体素子が形成された半導体チップ100の製造方法について説明する。
第2実施形態について説明する。本実施形態は、第1実施形態に対し、特性検査を行うようにしたものである。その他に関しては、第1実施形態と同様であるため、ここでは説明を省略する。
上記第2実施形態の変形例について説明する。上記第2実施形態において、特性検査にて不良品と判断されたチップ形成領域RAには、図1Hの工程において、裏面電極を構成する金属膜61等の他面側素子構成部分60を形成しないようにしてもよい。例えば、金属膜61を形成する際には、不良品と判断されたチップ形成領域RAを覆うように構成されたメタルマスクを用意し、当該メタルマスクを用いて金属膜61を形成するようにすればよい。
第3実施形態について説明する。本実施形態は、第1実施形態に対し、チップ形成領域RAをダイシングブレードで分割するようにしたものである。その他に関しては、第1実施形態と同様であるため、ここでは説明を省略する。
本発明は上記した実施形態に限定されるものではなく、特許請求の範囲に記載した範囲内において適宜変更が可能である。
1a 一面
1b 他面
3 エピタキシャル膜
10 加工ウェハ
10a 一面
10b 他面
13 チップ用変質層
14 ウェハ用変質層
40 チップ構成ウェハ
40b 他面
50 リサイクルウェハ
60 半導体チップ
Claims (4)
- 半導体素子が形成された半導体チップの製造方法であって、
窒化ガリウムで構成され、一面(1a)および他面(1b)を有する窒化ガリウムウェハ(1)を用意することと、
前記窒化ガリウムウェハの一面上にエピタキシャル膜(3)を形成することにより、前記エピタキシャル膜側の面を一面(10a)とすると共に前記窒化ガリウムウェハ側の面を他面(10b)とし、前記一面側に複数のチップ形成領域(RA)を有する加工ウェハ(10)を構成することと、
前記複数のチップ形成領域に対し、前記半導体素子の一面側素子構成部分(11)を形成することと、
前記加工ウェハの一面側に保持部材(20)を配置することと、
前記チップ形成領域を分割する、または分割するための分割構造(14、16)を形成することと、
前記分割構造を形成した後、前記加工ウェハの他面側から当該加工ウェハの内部にレーザ光(L)を照射することにより、前記加工ウェハの面方向に沿って、窒素がガリウムから分離されつつ前記分割構造から放出されたウェハ用変質層(15)を形成することと、
前記ウェハ用変質層を境界として前記加工ウェハを分割することにより、前記加工ウェハを、前記加工ウェハの一面側のチップ構成ウェハ(30)と、前記加工ウェハの他面側のリサイクルウェハ(40)とに分割することと、
前記チップ構成ウェハにおける前記リサイクルウェハと分割された側の他面(30b)に、前記半導体素子の他面側素子構成部分(60)を形成することと、
前記チップ構成ウェハから半導体チップ(100)を取り出すことと、
前記リサイクルウェハを再び前記窒化ガリウムウェハとして利用することと、を行い、
前記分割構造を形成することでは、前記加工ウェハの他面側からレーザ光を照射することにより、前記チップ形成領域の外縁に、窒素をガリウムから分離させたチップ用変質層(14)を形成し、
前記半導体チップを取り出すことの前に、前記保持部材をエキスパンドすることにより、前記チップ用変質層を境界として前記チップ形成領域を分割することを行う半導体チップの製造方法。 - 前記分割構造を形成すること、および前記ウェハ用変質層を形成することでは、前記分割構造と前記ウェハ用変質層とが交差するように、前記分割構造および前記ウェハ用変質層を形成する請求項1に記載の半導体チップの製造方法。
- 前記一面側素子構成部分を形成することの後、それぞれの前記チップ形成領域に対して特性検査を行うことを行い、
前記半導体チップを取り出すことでは、前記特性検査で良品と判定されたものみを取り出す請求項1または2に記載の半導体チップの製造方法。 - 前記他面側素子構成部分を形成することでは、前記特性検査で良品と判定された前記チップ形成領域に対してのみ行う請求項3に記載の半導体チップの製造方法。
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JP2020073157A JP7477835B2 (ja) | 2020-04-15 | 2020-04-15 | 半導体チップの製造方法 |
CN202110389492.8A CN113539928B (zh) | 2020-04-15 | 2021-04-12 | 半导体芯片及其制造方法 |
US17/229,137 US11810821B2 (en) | 2020-04-15 | 2021-04-13 | Semiconductor chip and method for manufacturing the same |
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JP2008252069A (ja) | 2007-03-06 | 2008-10-16 | Sanyo Electric Co Ltd | 半導体レーザ素子の製造方法および半導体レーザ素子 |
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