JP2014508426A - フリップチップ実装のために垂直コンタクトが再分散配置されたled - Google Patents
フリップチップ実装のために垂直コンタクトが再分散配置されたled Download PDFInfo
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- JP2014508426A JP2014508426A JP2013558531A JP2013558531A JP2014508426A JP 2014508426 A JP2014508426 A JP 2014508426A JP 2013558531 A JP2013558531 A JP 2013558531A JP 2013558531 A JP2013558531 A JP 2013558531A JP 2014508426 A JP2014508426 A JP 2014508426A
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 70
- 239000002184 metal Substances 0.000 claims abstract description 70
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052802 copper Inorganic materials 0.000 claims abstract description 59
- 239000010949 copper Substances 0.000 claims abstract description 59
- 238000000034 method Methods 0.000 claims abstract description 45
- 239000004065 semiconductor Substances 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims description 15
- 238000005530 etching Methods 0.000 claims description 10
- 238000000151 deposition Methods 0.000 claims description 6
- 238000009713 electroplating Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims 1
- 235000012431 wafers Nutrition 0.000 description 46
- 239000010931 gold Substances 0.000 description 12
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 11
- 229910052737 gold Inorganic materials 0.000 description 11
- 230000004888 barrier function Effects 0.000 description 6
- 229920002120 photoresistant polymer Polymers 0.000 description 6
- 229910052594 sapphire Inorganic materials 0.000 description 6
- 239000010980 sapphire Substances 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910004205 SiNX Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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- H01L2224/131—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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Abstract
Description
Claims (20)
- 発光ダイオード(LED)構造体であって、
第1の導電層、活性層、及び第2の導電層を含み、前記第1の導電層は底面を有し、前記第2の導電層は光が放射される上面を有する、半導体層と、
前記第1の導電層の前記底面に電気的に接続されかつ前記底面の反対側に第1の部分を有する第1の金属層と、
前記第1の金属層の第2の部分を前記第1の部分から絶縁するように前記第1の金属層内を延在する第1の誘電体部と、
前記第1の金属層の前記第2の部分を前記第2の導電層の前記上面に電気的に接続する金属シャントと、
前記第1の金属層の前記第1の部分に電気的に接続された1つ以上の第1の電極と、
前記LED構造体がフリップチップを形成するように、前記第1の金属層の前記第2の部分に電気的に接続された1つ以上の第2の電極と、
を含む、発光ダイオード構造体。 - 前記金属シャントを前記第2の導電層の前記上面以外から絶縁する第2の誘電体部を更に含む、請求項1に記載の構造体。
- 前記第1の金属層の前記第1の部分のセクションに沿って延在する第3の誘電体部を更に含み、
前記1つ以上の第2の電極は、前記第1の金属層の前記第2の部分に電気的に接触して、前記第3の誘電体部上に形成される、請求項2に記載の構造体。 - 前記第1の導電層、前記活性層、及び前記第2の導電層は、前記第1の誘電体部上と前記第1の金属層の前記第2の部分上とから除去されている、請求項1に記載の構造体。
- 前記第1の導電層、前記活性層、及び前記第2の導電層は、少なくとも、前記第1の金属層の前記第2の部分上から除去されている、請求項1に記載の構造体。
- 前記第1の金属層は、第1のめっきされた銅層である、請求項1に記載の構造体。
- 前記金属シャントは、第2のめっきされた銅層である、請求項6に記載の構造体。
- 前記第2の導電層の少なくとも1つの端に沿って形成され、前記金属シャントを前記第2の導電層の前記上面以外から絶縁する第2の誘電体部を更に含む、請求項1に記載の構造体。
- 前記金属シャントは、前記第2の誘電体部を覆い、前記第2の導電層の前記上面に電気的に接触し、前記金属シャントは、前記第2の導電層の前記上面の周囲に形成される、請求項8に記載の構造体。
- 前記第1の導電層はp型層であり、前記第2の導電層はn型層である、請求項1に記載の構造体。
- 前記LED構造体は、GaNベースのLED構造体である、請求項10に記載の構造体。
- フリップチップLED構造体を形成する方法であって、
成長基板を提供するステップと、
前記成長基板上に、第1の導電層、活性層、及び第2の導電層を含む半導体層であって、前記第1の導電層は底面を有し、前記第2の導電層は光が放射される上面を有する、当該半導体層をエピタキシャル成長させるステップと、
前記第1の導電層の前記底面の反対側に第1の誘電体部を形成するステップと、
前記第1の導電層の前記底面上に第1の金属層を堆積させるステップであって、前記第1の金属層は、前記第1の誘電体部がある前記第1の導電層の前記底面上には堆積しないようにブロックされる、ステップと、
前記成長基板を除去するステップと、
前記第1の誘電体部が前記第1の金属層の第1の部分を前記第1の金属層の第2の部分から電気的に絶縁するように、前記第1の誘電体部を覆う前記第1の導電層、前記活性層、及び前記第2の導電層を少なくともエッチングするステップであって、前記第1の金属層の前記第1の部分は前記第1の導電層の反対側であり前記第1の導電層と電気的に接触する、ステップと、
前記第1の金属層の前記第2の部分を前記第2の導電層の前記上面に電気的に接続する金属シャントを形成するステップと、
前記第1の金属層の前記第1の部分に電気的に接続する1つ以上の第1の電極を形成するステップと、
前記LED構造体がフリップチップを形成するように前記第1の金属層の前記第2の部分に電気的に接続する1つ以上の第2の電極を形成するステップと、
を含む、方法。 - 前記成長基板は、複数のLED構造体を支持するウェーハであり、前記方法は更に、
前記複数のLED構造体を互いから分離させるための分離線を画定する領域に沿って第2の誘電体部を形成するステップを更に含み、前記第1の誘電体部及び前記第2の誘電体部は、前記第1の金属層の前記第2の部分が間にある対向壁を形成する、請求項12に記載の方法。 - 複数のLED構造体が前記成長基板上に形成され、前記金属シャントは、1つのLED構造体と隣接LED構造体とが電気的に直列接続するように、前記隣接LED構造体の前記第1の金属層の前記第1の部分に電気的に接続する前記1つのLED構造体の前記第2の導電層の前記上面に接触する、請求項12に記載の方法。
- 前記第1の誘電体部から少なくとも前記第2の導電層の前記上面に延在する第2の誘電体部を形成するステップを更に含み、前記第2の誘電体部は、前記金属シャントを前記第2の導電層の前記上面以外から絶縁する、請求項12に記載の方法。
- 前記第1の金属層の前記第1の部分のセクションに沿って延在する第3の誘電体部を形成するステップと、
前記第1の金属層の前記第2の部分に電気的に接触して、前記第3の誘電体部上に前記1つ以上の第2の電極を形成するステップと、
を更に含む、請求項15に記載の方法。 - 前記第1の金属層を堆積させるステップは、銅層を電気めっきするステップを含む、請求項12に記載の方法。
- 前記第1の誘電体部から少なくとも第2の導電層の前記上面に延在する第2の誘電体部を形成するステップを更に含み、前記第2の誘電体部は、前記金属シャントを前記第2の導電層の前記上面以外から絶縁し、
前記金属シャントを形成するステップは、前記第2の誘電体部上に及び前記第2の導電層の前記上面の周囲に前記金属シャントを形成するステップを含む、請求項12に記載の方法。 - 前記第1の導電層はp型層であり、前記第2の導電層はn型層である、請求項12に記載の方法。
- 前記LED構造体は、GaNベースのLED構造体である、請求項12に記載の方法。
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