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Cleaning with chlorinated hydrocarbon (CHC)

As an unpolar solvent, CHCs have exceptional solubility for equally unpolar oils and weakly polar greases. The cleaning program may include a range of components: ultrasound, flushing, surge flushing and steam degreasing followed by vacuum drying are all possible. Separate DHD process control makes it possible to clean with elimination of all oil and even metallic partides smaller than 200 µm.

Advantages of cleaning with CHCs

• Exceptional degreasing effect
• Parts dry quickly
• Low solvent consumption due to complete vacuum
• Fine and super-fine cleaning for more complex geometries

After cleaning, all parts are placed in a laminar flow workbench to prevent recontamination.

Aqueous cleaning 

Aqueous cleaning involves cleaning blister packaging and KLTs in a neutral area based on the residual dirt requirement, which also minimises the particles on the packaging and parts can be inserted without risk of further contamination. Plus, multiple cleaning of the packaging is also no problem thanks to the gentle process involved, which means any labels and colour codes attached will be unaffected. 

Advantages of aqueous cleaning: 

• Minimises partides with per­missible remaining residues
• Blister-preserving cleaning
• ESD cleaning without changing the conductivity
• Weekly monitoring via residual dirt analysis