JP2022533516A - コンタクトの高さの差が大きいメモリ用途のための非導電性エッチングストップ構造 - Google Patents
コンタクトの高さの差が大きいメモリ用途のための非導電性エッチングストップ構造 Download PDFInfo
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76829—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers
- H01L21/76834—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers formation of thin insulating films on the sidewalls or on top of conductors
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- H10B—ELECTRONIC MEMORY DEVICES
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- H10B43/50—EEPROM devices comprising charge-trapping gate insulators characterised by the boundary region between the core and peripheral circuit regions
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/535—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including internal interconnections, e.g. cross-under constructions
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- H—ELECTRICITY
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
- H01L21/76805—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics the opening being a via or contact hole penetrating the underlying conductor
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76829—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers
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- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76895—Local interconnects; Local pads, as exemplified by patent document EP0896365
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- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/528—Geometry or layout of the interconnection structure
- H01L23/5283—Cross-sectional geometry
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- H10B—ELECTRONIC MEMORY DEVICES
- H10B41/00—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates
- H10B41/50—Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the boundary region between the core region and the peripheral circuit region
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B43/00—EEPROM devices comprising charge-trapping gate insulators
- H10B43/20—EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels
- H10B43/23—EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels
- H10B43/27—EEPROM devices comprising charge-trapping gate insulators characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
- H01L21/76816—Aspects relating to the layout of the pattern or to the size of vias or trenches
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Abstract
Description
一般的な概要
方法論
例示的なシステム
更なる例示的実施形態
Claims (25)
- 集積回路であって、
メモリ階段構造であって、前記メモリ階段構造に含まれる第1ステップおよび第2ステップの各々が、絶縁体材料層および導電材料層を含む、メモリ階段構造と、
前記メモリ階段構造上のエッチングストップであって、前記エッチングストップはhigh‐k誘電体材料を含む、エッチングストップと、
前記エッチングストップ上の絶縁体充填物材料と、
前記エッチングストップを通過し、前記第1ステップの前記導電材料層上にある第1コンタクトであって、第1の高さを有する第1コンタクトと、
前記エッチングストップを通過し、前記第2ステップの前記導電材料層上にある第2コンタクトであって、前記第1の高さより5倍以上大きい第2の高さを有する第2コンタクトと
を備える集積回路。 - 前記エッチングストップは多層構造であり、前記エッチングストップの第1層は、酸素、ならびにケイ素および窒素のうち一方または両方を含み、前記エッチングストップの第2層は前記high‐k誘電体材料を含む、請求項1に記載の集積回路。
- 前記第2層は前記第1層上にあり、前記第1層はそれぞれの前記ステップの前記導電材料層上にある、請求項2に記載の集積回路。
- 前記第2層は、それぞれの前記ステップの前記導電材料層上にあり、前記第1層は前記第2層上にある、請求項2に記載の集積回路。
- 前記high‐k誘電体材料はアルミニウムおよび酸素を含む、請求項2から4のいずれか一項に記載の集積回路。
- 前記エッチングストップは多フェーズ構造であり、前記エッチングストップの第1フェーズは、酸素、ならびに、ケイ素および窒素のうち一方または両方を含み、前記エッチングストップの第2フェーズは前記high‐k誘電体材料を含む、請求項1から5のいずれか一項に記載の集積回路。
- 前記第2フェーズは、前記第1層に近接し、前記第1フェーズは、それぞれの前記ステップの前記導電材料層に近接する、請求項2を引用する請求項6に記載の集積回路。
- 前記第2フェーズは、それぞれの前記ステップの前記導電材料層に近接し、前記第1フェーズは、前記第2層に近接する、請求項2を引用する請求項6に記載の集積回路。
- 前記high‐k誘電体材料は、アルミニウムおよび酸素を含む、請求項6から8のいずれか一項に記載の集積回路。
- 前記エッチングストップは、第1層および第2層を含む多層構造であり、前記第1層および前記第2層のうち一方または両方は複数のフェーズを含む、請求項1に記載の集積回路。
- 前記第1層は、それぞれの前記ステップの前記導電材料層上にあり、第1フェーズおよび第2フェーズを含み、前記第1フェーズおよび前記第2フェーズの各々は、酸素、ならびに、ケイ素および窒素のうち少なくとも1つを含み、前記第2層は前記第1層上にあり、前記high‐k誘電体材料を含む、請求項10に記載の集積回路。
- 前記第1層はそれぞれの前記ステップの前記導電材料層上にあり、前記high‐k誘電体材料を含み、前記第2層は、前記第1層上にあり、第1フェーズおよび第2フェーズを含み、前記第1フェーズおよび前記第2フェーズの各々は、酸素、ならびに、ケイ素および窒素のうち少なくとも1つを含む、請求項10または11に記載の集積回路。
- 前記第1層は、それぞれの前記ステップの前記導電材料層上にあり、酸素、ならびに、ケイ素および窒素のうち一方または両方を含み、前記第2層は、前記第1層上にあり、第1フェーズおよび第2フェーズを含み、前記第1フェーズおよび前記第2フェーズのうち一方は、前記high‐k誘電体材料を含み、前記第1フェーズおよび前記第2フェーズのうち他方は、異なるhigh‐k誘電体材料を含む、請求項10から12のいずれか一項に記載の集積回路。
- 前記第1層は、それぞれの前記ステップの前記導電材料層上にあり、第1フェーズおよび第2フェーズを含み、前記第1フェーズおよび前記第2フェーズのうち一方は、前記high‐k誘電体材料を含み、前記第1フェーズおよび前記第2フェーズのうち他方は、異なるhigh‐k誘電体材料を含み、前記第2層は、前記第1層上にあり、酸素、ならびに、ケイ素および窒素のうち一方または両方を含む、請求項10から13のいずれか一項に記載の集積回路。
- 前記エッチングストップは、80nm~120nmの範囲の厚さを有し、前記第1コンタクトおよび前記第2コンタクトは、100nm~300nmの範囲の幅または直径を有する、請求項1から14のいずれか一項に記載の集積回路。
- 前記第2コンタクトは、前記第1の高さより20倍以上大きい第2の高さを有する、請求項1から15のいずれか一項に記載の集積回路。
- 請求項1から16のいずれか一項に記載の集積回路を備えるメモリデバイス。
- 前記メモリデバイスはNANDメモリを備える、請求項17に記載のメモリデバイス。
- 前記メモリデバイスは、プロセッサの一部である、請求項18に記載のメモリデバイス。
- 集積回路であって、
メモリ階段構造であって、前記メモリ階段構造に含まれる第1ステップおよび第2ステップの各々は、絶縁体層および導電層を含む、メモリ階段構造と、
前記メモリ階段構造上のエッチングストップであって、high‐k誘電体材料を含む、エッチングストップと、
前記エッチングストップ上の酸化物充填材料と、
前記酸化物充填材料および前記エッチングストップを通過し、前記第1ステップの前記導電層上にある第1コンタクトであって、第1の高さを有する第1コンタクトと、
前記酸化物充填材料および前記エッチングストップを通過し、前記第2ステップの前記導電層上にある第2コンタクトであって、前記第1の高さより25倍以上大きい第2の高さを有する第2コンタクトと、
を備え、前記酸化物充填材料に対して前記high‐k誘電体材料のエッチング選択性は15倍以上であり、その結果、所与のエッチングプロセスについて、前記酸化物充填材料は、前記high‐k誘電体材料より15倍以上速くエッチングされる、集積回路。 - 前記エッチングストップは多層構造であり、前記エッチングストップの第1層は、酸素、ならびに、ケイ素および窒素のうち一方または両方を含み、前記エッチングストップの第2層は前記high‐k誘電体材料を含む、請求項20に記載の集積回路。
- 前記エッチングストップは多フェーズ構造であり、前記エッチングストップの第1フェーズは、酸素、ならびに、ケイ素および窒素のうち一方または両方を含み、前記エッチングストップの第2フェーズは前記high‐k誘電体材料を含む、請求項20または21に記載の集積回路。
- 前記エッチングストップは、第1層および第2層を含む多層構造であり、前記第1層および前記第2層のうち一方または両方は、複数のフェーズを含む、請求項20に記載の集積回路。
- 集積回路であって、
3D NANDメモリ階段構造であって、前記メモリ階段構造に含まれる第1ステップおよび第2ステップの各々は、酸化物層およびポリシリコン層を含む、3D NANDメモリ階段構造と、
前記メモリ階段構造上のエッチングストップであって、前記エッチングストップは酸化アルミニウムを含み、50nm~150nmの範囲の厚さを有するエッチングストップと、
前記エッチングストップ上の酸化物充填材料と、
前記酸化物充填材料および前記エッチングストップを通過し、前記第1ステップの前記ポリシリコン層上にある第1コンタクトであって、第1の高さを有する第1コンタクトと、
前記酸化物充填材料および前記エッチングストップを通過し、前記第2ステップの前記ポリシリコン層上にある第2コンタクトであって、前記第2コンタクトは、前記第1の高さより35倍以上大きい第2の高さを有し、25:1以上の高さ対幅のアスペクト比を有する第2コンタクトと
を備え、前記酸化物充填材料に対してhigh‐k誘電体材料のエッチング選択性は15倍以上であり、所与のエッチングプロセスについて、前記酸化物充填材料は、前記high‐k誘電体材料より15倍以上速くエッチングされる、集積回路。 - 請求項24に記載の集積回路を備えるメモリデバイスであって、前記メモリデバイスはプロセッサの一部である、メモリデバイス。
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