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Positive Photoresist Developer CD-26 (TMAH 2.38%)

CAS Number: 75-59-2

CD-26 photoresist developer is a precisely formulated 2.38% tetramethylammonium hydroxide (TMAH) aqueous solution that is the industry-standard developer for positive tone novolac and chemically amplified photoresists. Metal-ion-free chemistry eliminates alkali metal contamination, and the precise TMAH concentration provides predictable, reproducible development contrast and CD control.

Technical Specifications

appearanceColorless clear liquid
pH (25°C)13.0–13.5
purity (%)≥99.9 (TMAH assay at 2.38 wt%)
particles (≥0.2 µm)≤10 per mL
metallic impurities (Na, K, Fe)≤0.1 ppb each

Applications

  • Positive tone novolac photoresist development (g/i-line)
  • Chemically amplified resist (CAR) development (DUV/EUV)
  • MEMS and MEMS-adjacent patterning development
  • Flat panel display TFT patterning development
  • Wafer-level packaging (WLP) photolithography

Key Features

  • Industry-standard 2.38% TMAH concentration for predictable CD control
  • Metal-ion-free formulation prevents CMOS device threshold voltage shift
  • Ultra-low particle count minimizes line-edge roughness and defects
  • Compatible with puddle, spray, and immersion development tools

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Positive Photoresist Developer CD-26 (TMAH 2.38%) chemical structure

CAS Number

75-59-2

Availability

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