JP2020092269A - イオン注入を使用した太陽電池エミッタ領域製造 - Google Patents
イオン注入を使用した太陽電池エミッタ領域製造 Download PDFInfo
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- JP2020092269A JP2020092269A JP2019229344A JP2019229344A JP2020092269A JP 2020092269 A JP2020092269 A JP 2020092269A JP 2019229344 A JP2019229344 A JP 2019229344A JP 2019229344 A JP2019229344 A JP 2019229344A JP 2020092269 A JP2020092269 A JP 2020092269A
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- 238000004519 manufacturing process Methods 0.000 title abstract description 57
- 238000005468 ion implantation Methods 0.000 title abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 113
- 239000000758 substrate Substances 0.000 claims abstract description 101
- 239000012535 impurity Substances 0.000 claims abstract description 78
- 239000002019 doping agent Substances 0.000 claims abstract description 63
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 115
- 125000004429 atom Chemical group 0.000 claims description 52
- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 6
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 4
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 abstract description 142
- 239000010703 silicon Substances 0.000 abstract description 142
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 140
- 230000008569 process Effects 0.000 abstract description 66
- 238000005530 etching Methods 0.000 abstract description 31
- 238000002347 injection Methods 0.000 abstract 7
- 239000007924 injection Substances 0.000 abstract 7
- 239000000243 solution Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 296
- 239000007943 implant Substances 0.000 description 160
- 229910021417 amorphous silicon Inorganic materials 0.000 description 68
- 238000002513 implantation Methods 0.000 description 57
- 229920005591 polysilicon Polymers 0.000 description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 23
- 239000000463 material Substances 0.000 description 23
- 229910052698 phosphorus Inorganic materials 0.000 description 23
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 21
- 239000011574 phosphorus Substances 0.000 description 21
- 229910002804 graphite Inorganic materials 0.000 description 20
- 239000010439 graphite Substances 0.000 description 20
- 230000015572 biosynthetic process Effects 0.000 description 19
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 18
- 235000012431 wafers Nutrition 0.000 description 18
- 238000000151 deposition Methods 0.000 description 17
- 238000000137 annealing Methods 0.000 description 16
- 229910052785 arsenic Inorganic materials 0.000 description 14
- 229910052796 boron Inorganic materials 0.000 description 14
- 230000008021 deposition Effects 0.000 description 13
- 238000000059 patterning Methods 0.000 description 13
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 11
- 150000002500 ions Chemical class 0.000 description 11
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 10
- 238000010884 ion-beam technique Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 9
- 238000007654 immersion Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 9
- 230000000717 retained effect Effects 0.000 description 9
- 238000013459 approach Methods 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 230000009257 reactivity Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 229910021419 crystalline silicon Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 150000003376 silicon Chemical class 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 238000001994 activation Methods 0.000 description 3
- -1 boron ions Chemical class 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000000873 masking effect Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 238000001039 wet etching Methods 0.000 description 3
- LISDBLOKKWTHNH-UHFFFAOYSA-N 1,3,5-Trisilacyclohexan Natural products C1[SiH2]C[SiH2]C[SiH2]1 LISDBLOKKWTHNH-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 230000000153 supplemental effect Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910018540 Si C Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- KSBGKOHSBWCTOP-UHFFFAOYSA-N bis(silylmethyl)silane Chemical compound [SiH3]C[SiH2]C[SiH3] KSBGKOHSBWCTOP-UHFFFAOYSA-N 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 150000001793 charged compounds Chemical class 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- DLNFKXNUGNBIOM-UHFFFAOYSA-N methyl(silylmethyl)silane Chemical compound C[SiH2]C[SiH3] DLNFKXNUGNBIOM-UHFFFAOYSA-N 0.000 description 1
- UIUXUFNYAYAMOE-UHFFFAOYSA-N methylsilane Chemical compound [SiH3]C UIUXUFNYAYAMOE-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920003257 polycarbosilane Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- HVXTXDKAKJVHLF-UHFFFAOYSA-N silylmethylsilane Chemical compound [SiH3]C[SiH3] HVXTXDKAKJVHLF-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
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- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
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Abstract
Description
(項目1)
太陽電池の交互のN型及びP型エミッタ領域の製造方法であって、
基板上にシリコン層を形成するステップと、
第1のシャドーマスクを介して、複数の第1の導電型のドーパント不純物原子を上記シリコン層に注入して、複数の第1の注入領域を形成し、上記シリコン層の複数の非注入領域を生じさせるステップと、
第2のシャドーマスクを介して、複数の第2の反対の導電型のドーパント不純物原子を上記シリコン層の上記複数の非注入領域の一部に注入して、複数の第2の注入領域を形成し、上記シリコン層の残留する複数の非注入領域を生じさせるステップと、
上記シリコン層の残留する上記複数の非注入領域を選択的エッチングプロセスによって除去し、上記シリコン層の上記複数の第1の注入領域及び上記複数の第2の注入領域を保持するステップと、
上記シリコン層の上記複数の第1の注入領域及び上記複数の第2の注入領域をアニールし、複数のドープされた多結晶シリコンエミッタ領域を形成するステップと、を含む、方法。
(項目2)
上記シリコン層を形成するステップが、水素化アモルファスシリコン層を形成するステップを含む、項目1に記載の方法。
(項目3)
上記水素化アモルファスシリコン層を形成するステップが、プラズマ化学気相成長法(PECVD)を使用するステップを含む、項目1又は2に記載の方法。
(項目4)
上記シリコン層の残留する上記複数の非注入領域を上記選択的エッチングプロセスにより除去するステップが、水酸化物系ウェットエッチング液を使用して上記基板の複数の露出部をテクスチャ化するステップを含む、項目1から3のうちいずれか一項に記載の方法。
(項目5)
上記シリコン層の上記複数の第1の注入領域及び上記複数の第2の注入領域をアニールするステップが、上記基板の複数の露出部への低量のP型ドーパント注入を実施するステップを含む、項目1から4のうちいずれか一項に記載の方法。
(項目6)
上記シリコン層を形成するステップが、上記基板上に配設された薄い誘電体層上に上記シリコン層を形成するステップを含み、上記基板が単結晶シリコン基板である、項目1から5のうちいずれか一項に記載の方法。
(項目7)
上記第1及び第2のシャドーマスクを介して注入する上記ステップが、第1及び第2のグラファイトシャドーマスクを介してそれぞれ注入するステップを含み、上記第1及び第2のグラファイトシャドーマスクが、順次、上記シリコン層に近接して位置付けされるが、上記シリコン層から離れている、項目1から6のうちいずれか一項に記載の方法。
(項目8)
上記複数のドープされた多結晶シリコンエミッタ領域上に複数の導電性コンタクトを形成するステップを更に含む、項目1から7のうちいずれか一項に記載の方法。
(項目9)
項目1から8のうちいずれか一項に記載の方法に従って製造される太陽電池。
(項目10)
太陽電池のエミッタ領域を製造する方法であって、
基板上にシリコン層を形成するステップと、
上記シリコン層上にカルボシラン層を形成するステップと、
シャドーマスクを介して、複数のドーパント不純物原子を上記カルボシラン層及び上記シリコン層に注入し、複数の注入済みシリコン領域及び対応する上記カルボシラン層の複数の自己整合注入領域を形成し、上記シリコン層の複数の非注入領域及び対応する上記カルボシラン層の複数の非注入領域を生じさせるステップと、
上記シリコン層の上記複数の非注入領域及び上記カルボシラン層の上記複数の非注入領域を除去するステップであって、上記除去中、上記カルボシラン層の複数の注入領域が上記シリコン層の複数の注入領域を保護する、ステップと、
上記シリコン層の上記複数の注入領域をアニーリングし、複数のドープされた多結晶シリコンエミッタ領域を形成するステップと、を含む、方法。
(項目11)
上記アニーリング後に、上記カルボシラン層の上記複数の注入領域を除去するステップと、
上記複数のドープされた多結晶シリコンエミッタ領域上に複数の導電性コンタクトを形成するステップと、を更に含む、項目10に記載の方法。
(項目12)
上記カルボシラン層の上記複数の注入領域を貫通して、上記複数のドープされた多結晶シリコンエミッタ領域上に複数の導電性コンタクトを形成するステップを更に含む、項目10に記載の方法。
(項目13)
上記シリコン層を形成するステップが、水素化アモルファスシリコン層を形成するステップを有する、項目10に記載の方法。
(項目14)
上記水素化アモルファスシリコン層を形成するステップ及び上記カルボシラン層を形成するステップが、プラズマ化学気相成長法(PECVD)を使用するステップを含む、項目13に記載の方法。
(項目15)
上記シリコン層の上記複数の非注入領域及び上記カルボシラン層の上記複数の非注入領域を除去するステップが、水酸化物系ウェットエッチング液を使用して上記基板の複数の露出部をテクスチャ化するステップを含む、項目10に記載の方法。
(項目16)
上記シリコン層を形成するステップが、上記基板上に配設された薄い誘電体層上に上記シリコン層を形成するステップを含み、上記基板が単結晶シリコン基板である、項目10に記載の方法。
(項目17)
上記シャドーマスクを介して注入するステップが、グラファイトシャドーマスクを介して注入するステップを含み、上記グラファイトシャドーマスクが、上記シリコン層に近接して位置付けされるが、上記シリコン層から離れている項目10に記載の方法。
(項目18)
項目10に記載の方法に従って製造される太陽電池。
(項目19)
バックコンタクト型太陽電池であって、
受光面及び裏面を有する単結晶シリコン基板と、
上記単結晶シリコン基板の上記裏面上に配設される薄い誘電体層と、
上記薄い誘電体層上に配設される多結晶シリコンエミッタ領域であって、上記多結晶シリコンエミッタ領域に複数の不純物原子がドープされる、多結晶シリコンエミッタ領域と、
上記多結晶シリコンエミッタ領域上に配設され、上記多結晶シリコンエミッタ領域と整合されるカルボシラン層と、
上記カルボシラン層を貫通して上記多結晶シリコンエミッタ領域上に配設される導電性コンタクト構造と、を備える、バックコンタクト型太陽電池。
(項目20)
上記カルボシラン層にも上記複数の不純物原子がドープされる、項目19に記載のバックコンタクト型太陽電池。
Claims (10)
- 受光面および裏面を有する基板と、
前記基板の前記裏面上に配設される薄い誘電体層と、
前記薄い誘電体層上に配設される第1の多結晶シリコンエミッタ領域であって、前記第1の多結晶シリコンエミッタ領域は第1の導電型のドーパント不純物原子がドープされており、前記第1の多結晶シリコンエミッタ領域は、前記第1の導電型の前記ドーパント不純物原子とは異なる補助不純物種を含む、第1の多結晶シリコンエミッタ領域と、
前記薄い誘電体層上に配設される第2の多結晶シリコンエミッタ領域であって、前記第2の多結晶シリコンエミッタ領域は、前記第1の導電型とは反対の第2の導電型のドーパント不純物原子がドープされている、第2の多結晶シリコンエミッタ領域と、
前記第1の多結晶シリコンエミッタ領域および前記第2の多結晶シリコンエミッタ領域上に配設される導電性コンタクト構造と、を備える、太陽電池。 - 受光面および裏面を有する基板と、
前記基板の前記裏面上に配設される薄い誘電体層と、
前記薄い誘電体層上に配設される第1の多結晶シリコンエミッタ領域であって、前記第1の多結晶シリコンエミッタ領域は、第1の導電型のドーパント不純物原子がドープされており、前記第1の多結晶シリコンエミッタ領域は、前記第1の導電型の前記ドーパント不純物原子とは異なる補助不純物種を含み、前記補助不純物種は、前記第1の導電型の前記ドーパント不純物原子と整合されている、第1の多結晶シリコンエミッタ領域と、
前記薄い誘電体層上に配設される第2の多結晶シリコンエミッタ領域であって、前記第2の多結晶シリコンエミッタ領域は、前記第1の導電型とは反対の第2の導電型のドーパント不純物原子がドープされている、第2の多結晶シリコンエミッタ領域と、
前記第1の多結晶シリコンエミッタ領域および前記第2の多結晶シリコンエミッタ領域上に配設される導電性コンタクト構造と、を備える、太陽電池。 - 受光面および裏面を有する基板と、
前記基板の前記裏面上に配設される薄い誘電体層と、
前記薄い誘電体層上に配設される第1の多結晶シリコンエミッタ領域であって、前記第1の多結晶シリコンエミッタ領域は、第1の導電型のドーパント不純物原子がドープされており、前記第1の多結晶シリコンエミッタ領域は、前記第1の導電型の前記ドーパント不純物原子とは異なる補助不純物種を含み、前記補助不純物種は、前記第1の導電型の前記ドーパント不純物原子と整合されていない、第1の多結晶シリコンエミッタ領域と、
前記薄い誘電体層上に配設される第2の多結晶シリコンエミッタ領域であって、前記第2の多結晶シリコンエミッタ領域は、前記第1の導電型とは反対の第2の導電型のドーパント不純物原子がドープされている、第2の多結晶シリコンエミッタ領域と、
前記第1の多結晶シリコンエミッタ領域および前記第2の多結晶シリコンエミッタ領域上に配設される導電性コンタクト構造と、を備える、太陽電池。 - 前記補助不純物種は、窒素原子、炭素原子および酸素原子から成る群から選択される不純物種を含む、請求項1から3のいずれか一項に記載の太陽電池。
- 前記基板は、単結晶シリコン基板を含む、請求項1から4のいずれか一項に記載の太陽電池。
- 前記第1の導電型の前記ドーパント不純物原子は、N+ドーパントまたはP+ドーパントを含む、請求項1から5のいずれか一項に記載の太陽電池。
- 前記薄い誘電体層は、シリコン酸化物層を含む、請求項1から6のいずれか一項に記載の太陽電池。
- 前記第1の多結晶シリコンエミッタ領域と、前記第2の多結晶シリコンエミッタ領域との間に配設されるトレンチを更に備える、請求項1から7のいずれか一項に記載の太陽電池。
- 前記第1の多結晶シリコンエミッタ領域および前記第2の多結晶シリコンエミッタ領域上に配設されるカルボシラン層を更に備える、請求項1から8のいずれか一項に記載の太陽電池。
- 前記第1の多結晶シリコンエミッタ領域および前記第2の多結晶シリコンエミッタ領域上に配設される絶縁層をさらに備え、前記導電性コンタクト構造は前記絶縁層を貫通して配設される、請求項1から9のいずれか一項に記載の太陽電池。
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SA516371270B1 (ar) | 2021-01-14 |
ZA201603437B (en) | 2018-11-28 |
US9716205B2 (en) | 2017-07-25 |
AU2014364086B2 (en) | 2019-06-20 |
TWI655676B (zh) | 2019-04-01 |
US9401450B2 (en) | 2016-07-26 |
MX2016006973A (es) | 2016-09-27 |
TW201528344A (zh) | 2015-07-16 |
CN105659395B (zh) | 2018-02-02 |
PH12016501052A1 (en) | 2016-08-15 |
BR112016013216A2 (ja) | 2017-08-08 |
CN105659395A (zh) | 2016-06-08 |
JP6636913B2 (ja) | 2020-01-29 |
JP7028853B2 (ja) | 2022-03-02 |
PH12016501052B1 (en) | 2016-08-15 |
MY192488A (en) | 2022-08-23 |
JP2017504950A (ja) | 2017-02-09 |
US20160315214A1 (en) | 2016-10-27 |
AU2014364086A1 (en) | 2016-03-24 |
WO2015088992A1 (en) | 2015-06-18 |
EP3080847A4 (en) | 2016-10-19 |
KR20160096084A (ko) | 2016-08-12 |
EP3080847B1 (en) | 2019-04-10 |
KR102407023B1 (ko) | 2022-06-10 |
BR112016013216B1 (pt) | 2022-06-14 |
US20150162483A1 (en) | 2015-06-11 |
EP3080847A1 (en) | 2016-10-19 |
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