Etch Resist
Apiezon Wax W and Etch Resist
Apiezon Wax W is the most versatile of the three waxes in the Apiezon range, satisfying the widest temperature range and the lowest vapour pressures. It has a long and successful history in many applications but is perhaps most extensively used as an etch resist in the electronics industry for both semi conductor and printed circuit board applications.
Apiezon Wax W, also known as ‘Black Wax’ is an ideal etch resist because it has an excellent resistance to etching fluids up to 75°C in all sorts of etchants including KOH, TMAH, EDP, HF, HNO3, NaOH and acetic acid, but can still be easily removed using hydrocarbon or chlorinated solvents. Powerful "gettering" qualities also mean that in post etch cleaning steps impurities which may have remained on the surface if a solvent were used in isolation, are also removed with the wax.
Furthermore the hydrocarbon formulation and very 'clean' meltdown properties of the wax ensure that etching unwanted contaminates are not introduced into the system.
Benefits of Using Apiezon Wax W as an Etch Resist
- Etch fluid resistant
- First-rate vapour pressure characteristics
- High purity combined with powerful ‘gettering’ & clean meltdown properties
- Excellent waterproof medium
- Easy to use and to remove
- 10 year shelf life
