Alliance A 6 Exelan HP Dielectric

Etch systems remove selected material from a wafer after pattern transfer from a masking layer. Dielectric etch tools are used where insulating films must be opened, shaped, or cleared with controlled pattern fidelity. Such equipment is part of front end and related microfabrication patterning flows.

Etch tools process wafers by exposing selected surface films to a controlled dry process environment that removes material from unmasked regions. Dielectric etch systems are generally used when patterned insulating layers must be etched with directionality and selectivity suited to device structures. Process results depend on the interaction among the patterned mask, the wafer film stack, and the chamber conditions.

A dielectric etch tool is used after a pattern has been defined in photoresist or another masking layer and before later strip, clean, deposition, or integration steps. A dielectric etch step commonly sits between lithography and subsequent module operations that rely on openings or profiles formed in insulating films. The exact placement depends on the device module being built.

Dielectric etch systems are used for patterning insulating materials in semiconductor and related microfabrication processes. Typical uses include opening contact features, defining vias, shaping isolation-related films, and transferring patterns into oxide or nitride type layers where an insulating film must be removed in selected areas.