Cresol-Novolak for photoresist synthesis

[Ralonica]

I am looking for a type of novolak called cresol-novolak. There are orto meta and para Cresol types.

Does anybody know whhere to find this type of novolak? It is intended for synthesis of photoresist.

It should NOT be cresol-epoxy-novolak which is something completly different.

Any idea is og great help. I coul dsynthesis the novolak myself also but it is a bit messy process.

/Ralonica

[ChenBeier]

Patents

https://patents.google.com/patent/JPH09132624A/en

https://patents.google.com/patent/US_4587196A/en

https://www.google.com/search?q=cresol+ ... opiHgQI_37

[Rosahnston]

I am looking for a type of novolak called cresol-novolak. There are orto meta and para Cresol types.

Does anybody know whhere to find this type of novolak? It is intended for synthesis of photoresist.

It should NOT be cresol-epoxy-novolak which is something completly different.

Any idea is og great help. I coul dsynthesis the novolak myself also but it is a bit messy process.

/Ralonica

Hey Ralonica, you're right—sourcing pure cresol-novolak (especially separated into ortho/meta/para) can be tricky. Have you checked with chemical suppliers like Sigma-Aldrich or TCI?

[ChenBeier]

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