Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

What is photoresist?

April 26, 2017photoresist

0

Posted

What is photoresist?

1 Answer

0

Posted

Photoresist is a liquid that, when exposed to light, changes its structure. Positive resist becomes mildly acidic and a basic solution, TetraMethylAmmoniumHydroxide (TMAH), dissolves away the exposed resist. The remaining resist is baked and becomes resistant to acid and/or plasma etching steps. A negative resist crosslinks and/or becomes harder when light hits it. The unexposed resist is washed away using a solvent that the resist material is carried in.