Etchants for chromium thin films for microelectronics applications offer excellent compatibility with positive and negative photoresists. Chromium Etchants provide fine-line control with minimal undercutting. High purity formulations filtered to 0.2 micron are ideal for critical devices.

CHROMIUM ETCHANT 1020
Fast etch rate with minimal undercutting

CHROMIUM ETCHANT 1020AC
Slower etch rate to eliminate undercutting and for broader compatibility

CHROMIUM MASK ETCHANT CE-5M
Ideal for high precision photomask etching.

CHROMIUM CERMET ETCHANT TFE
For chromium-silicon films. Compatible with copper, nickel, and gold.

Source: http://transene.com/cr/