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Low-k Dielectric Additive

CAS Number: 17689-77-9

Low-k dielectric additive is a pore-generating or matrix-modifying chemical incorporated into dielectric thin films to reduce the dielectric constant (k) below 3.0 for advanced semiconductor interconnect layers. Reducing k lowers RC delay and cross-talk in dense IC metallization. Porogen-based additives introduce controlled nanopores into CVD or spin-on dielectric matrices to achieve ultra-low-k (ULK) values.

Technical Specifications

poreSize2–5 nm average
porosity10–40% (ULK grade)
appearanceClear liquid or solid precursor
thermalStability>400°C
dielectricConstant2.0–3.0 (target film k value)
mechanicalStrengthYoung's modulus >5 GPa

Applications

  • CVD low-k dielectric film deposition
  • Spin-on low-k dielectric coating
  • BEOL inter-metal dielectric in advanced nodes
  • Porous ultra-low-k (ULK) film formation
  • 3D IC dielectric layer modification

Key Features

  • Lowers dielectric constant to reduce RC delay
  • Controlled porosity via porogen loading
  • Maintains mechanical integrity for CMP compatibility
  • Compatible with both CVD and spin-on deposition

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Low-k Dielectric Additive chemical structure

CAS Number

17689-77-9

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