Stripping

Photoresist Stripper for Dry Film, Liquid, Soldermask, and More

Product Line for Photoresist Stripping

Photoresist stripper

CC8000

XLi

2300 Series


Common Photoresists Stripped

Dry film photoresists (aqueous-based)

Ink resist (aqueous-based)

Liquid photoresists (aqueous-based for high resolution )

Non-Aqueous Resist used in Wafer Manufacturing

Solder mask resist dry and liquid

Tin resist

Photoresist Stripping System


Common Uses for Chemcut Strippers

Stripping photoresist for PCBs and chemical milling

Stripping photoresist on glass surfaces

Stripping resist on wafers and semiconductor industry (SEMI)

Stripping metallic resist for PCBs (Tin Strip)

Stripping using organic solvents


Common Equipment Parameters

Speed range: 14 – 140 inches / minute

Max temperature: 160 °F (can make a 200 °F stripper)


Photoresist Stripping Process

The photoresist stripping process follows the wet etching step and as a whole is less technical than the other wet processes. Basically, the resist needs to be in the chemistry long enough to strip. We build strippers for both positive photoresist and negative photoresist.

There are a couple of important factors to take into account if you want an efficient stripping line.

First, you need to work with your chemistry supplier and photoresist film supplier to make sure your resist and chemistry are compatible with each other. If they are not compatible you will see your resist stripping off in sheets, as goo, as large pieces, or very fine pieces.

None of these are good!

You want your resist to strip in small chips. The reason you want small chips is that our strippers are designed to filter out small chips.

If you are getting any other size or goo, this means your resist and chemistry are a mismatch, our stripper will have a hard time filtering out particles. This will result in plugged nozzles.

Once you have a perfect match of chemistry and resist, we can move onto how our stripper design will help your process.

Our strippers are designed with world-class filtering which will increase your lines efficiency, speed, and cleanliness.

Stripping resist creates a lot of small particles. These particles have the potential to cripple your throughput if not filtered correctly. We design our stripper to have a clean sump and a dirty sump. Separating as many particles from the pumps feeding the spray tubes as possible and returning stripper solution to the clean sump after filtration.

The dirty sump will then be pumped through our on-board resist filter. The filtered resist will then be pumped to our bulk separator.

This design has helped many chemical etching plants optimize their throughput by decreasing downtime and maintenance time on their stripper module.

Chemcut also offers a range of high-pressure options for the sometimes-difficult task of removing photoresist after a plating step. Pump and spray pressures of 100 psi up to 500 psi is possible. A high-pressure station can be easily added to our modular systems if needed, XLi or CC8000. Check out our other options that can be added to your stripping machine.

Specifically, for building Strippers, customers love that we have the ability to test the chemistry for compatibility. We can also do spraying tests. Which will result in more accurate photoresist stripping time estimates.

etching pcb and chemical milling

preloader