DNQ raw materials for electronic photoresists

DNQ in positive photoresist chemistry

Positive photoresists for electronic circuit patterning use diazonaphthoquinone derivatives blended with novolac or cresol-formaldehyde resins. On UV exposure, DNQ undergoes a Wolff rearrangement that increases the solubility of exposed areas in alkaline developer.

Formulators need high-purity DNQ actives with consistent batch assay and documented molecular structure to maintain linewidth control and clean development across production lots.

Which Orion grades serve photoresist formulators

Orion supplies DNQ chemistry at three integration points for photoresist coating lines and in-house synthesis programmes:

• Freedom Plus 1413 (CAS 3770-97-6) — ready-esterified DNQ-cresol resin, the main photoactive component in coating solutions
• Orion Freedom 2-1-4 (CAS 64173-96-2) — water-soluble sodium salt for in-house esterification or custom DNQ synthesis routes
• 2-1-4 Diazo Building Block — high-purity intermediate with COA for controlled synthesis programmes

What photoresist buyers should verify

Before qualifying a new DNQ supplier, electronics procurement teams typically check assay consistency, moisture content, batch COA availability, and compatibility with their novolac resin system. Orion supplies full batch documentation — COA, MSDS and data sheets — for regulatory review.

Indian supply for a diversifying market

Global photoresist and intermediate buyers are actively diversifying away from single-source supply. Orion offers Made-in-India DNQ actives with direct factory access in Karad, Maharashtra — contact our sales team for trial quantities and specification sheets.