Centura DPS 2

An etch tool removes selected material from a wafer surface after a pattern has been defined. A production plasma etch platform commonly combines vacuum handling, process gas delivery, plasma generation, and chamber control so that patterned films can be transferred into underlying layers.

A plasma etch system operates by creating a controlled reactive environment inside a process chamber and exposing the wafer surface to that environment. Plasma etch systems use gas chemistry and ion-assisted reactions to remove unprotected material while masked regions remain in place. Multi-chamber etch platforms generally keep wafer handling and process steps integrated under vacuum to support repeatable processing.

Etch tools are used in the pattern transfer portion of semiconductor fabrication. Etch processing follows lithographic pattern definition and commonly precedes later cleaning, deposition, or additional etch operations in the device flow.

Etch systems of this class are used to transfer lithographically defined patterns into exposed films on the wafer. Poly etch processes are used where gate-related or other semiconductive layers must be defined, while metal etch processes are used where conductive interconnect or related layers must be patterned.