DWL66

Direct-write lithography systems pattern resist without a photomask by steering or scanning a writing beam across a coated substrate. Direct-write lithography systems are commonly used where design flexibility, rapid iteration, or limited mask volume is more important than the throughput of projection exposure. Direct-write lithography systems commonly serve research, prototyping, and specialized microfabrication work.

Maskless laser writers generally operate by coating a substrate with photoresist, loading the substrate onto a precision stage, aligning the pattern to substrate marks when needed, and scanning a focused beam to define the layout. Maskless laser writers generally rely on motion control, focusing, and exposure control to transfer digital layout data into resist. Maskless laser writers can also support overlay work and topographic patterning modes when equipped with alignment or grayscale functions.

Direct-write lithography tools are used after substrate preparation and photoresist coating, and before resist development and any subsequent etch, deposition, plating, or lift-off sequence. Direct-write lithography tools fill the pattern-definition step in a microfabrication flow. Direct-write lithography tools are often selected when a process requires short design-turn cycles or frequent layout changes.

Direct-write laser lithography is commonly used for research patterning, mask fabrication, and custom microdevice development. Direct-write laser lithography is suitable for work that benefits from digital pattern generation on resist-coated substrates. Direct-write laser lithography is also used for structures that need iterative design changes or specialized alignment strategies.