摘要:
The present invention provides an optimized direct write lithography system using optical mirrors. That is, a maskless lithography system is provided. The maskless direct-write lithography system provided uses an array of mirrors configured to operate in a tilting mode, a piston-displacement mode, or both in combination. The controlled mirror array is used as a substitute for the traditional chrome on glass masks. In order to avoid constraining the system to forming edges of patterns aligned with the array of mirrors, gray-scale techniques are used for subpixel feature placement. The direct-writing of a pattern portion may rely on a single mirror mode or a combination of modes.
摘要:
The invention provides a method of performing process window compliant corrections of a design layout. The invention includes an operator performing the following steps: (1) simulating Develop Inspect Critical Dimension (DI CD) at best exposure conditions using the provided original layout pattern; (2) simulating DI CD at predefined boundary exposure conditions using the provided original layout pattern; (3) if the DI CD from step (1) meets the target DI CD definition, and the DI CD from step (2) meets process window specifications, convergence takes place; and (4) modifying the layout pattern and repeating steps (2) through (3) until DI CD from step (2) reaches the specification limit if any portion of step (3) is not achieved.
摘要:
The present invention provides methods and apparatus for accomplishing a phase shift lithography process using a blocker to block zero order light to improve image quality for phase shift lithography systems and methodologies. A maskless lithography system is provided. The lithography system provided uses a phase shift pattern generator which projects a phase shift image pattern along an optical path onto a photoimageable layer of a substrate in order to facilitate pattern transfer. A blocking element is interposed in the optical path to block zero order light in the image pattern, thereby improving image quality.
摘要:
The present invention provides an optimized direct write lithography system using optical mirrors. That is, a maskless lithography system is provided. The maskless direct-write lithography system provided uses an array of mirrors configured to operate in a tilting mode, a piston-displacement mode, or both in combination. The controlled mirror array is used as a substitute for the traditional chrome on glass masks. In order to avoid constraining the system to forming edges of patterns aligned with the array of mirrors, gray-scale techniques are used for subpixel feature placement. The direct-writing of a pattern portion may rely on a single mirror mode or a combination of modes.
摘要:
The present invention provides methods and apparatus for accomplishing a optical direct write phase shift lithography. A lithography system and method are provided wherein a mirror array is configured to generate vortex phase shift optical patterns that are directed onto a photosensitive layer of a substrate. The lithography methods and systems facilitate pattern transfer using such vortex phase shift exposure patterns.
摘要:
The present invention provides methods and apparatus for accomplishing a phase shift lithography process using a off axis light to reduce the effect of zero order light to improve the process window for maskless phase shift lithography systems and methodologies. A lithography system is provided. The lithography system provided uses off axis light beams projected onto a mirror array configured to generate a phase shift optical image pattern. This pattern is projected onto a photoimageable layer formed on the target substrate to facilitate pattern transfer.
摘要:
The present invention provides an optimized direct write lithography system using optical mirrors. That is, a maskless lithography system is provided. The maskless direct-write lithography system provided uses an array of mirrors configured to operate in a tilting mode, a piston-displacement mode, or both in combination. The controlled mirror array is used as a substitute for the traditional chrome on glass masks. In order to avoid constraining the system to forming edges of patterns aligned with the array of mirrors, gray-scale techniques are used for subpixel feature placement. The direct-writing of a pattern portion may rely on a single mirror mode or a combination of modes.
摘要:
A phase shift mask which includes an etched quartz region that provides a 180 degree phase shift, and an attenuated film which provides a 0 (or 360) degree phase shift. The phase shift mask provides performance comparable to CPL, while at the same time, avoiding the problems and manufacturability issues associated with EDA. The phase shift mask has better contrast than CPL, and a process window that is comparable to both CPL and alternating phase shift masks. The phase shift mask that does not require a second critical write, as is the case with CPL, does not need a second mask to eliminate unwanted patterns resulting from phase edges, and does not need a complicated EDA solution (like CPL). Finally, the phase shift mask is simple to manufacture, requiring only a single write step if employed with the back-side exposure technique which is well known in the mask-making industry.
摘要:
The present invention provides an optimized direct write lithography system using optical mirrors. That is, a maskless lithography system is provided. The maskless direct-write lithography system provided uses an array of mirrors configured to operate in a tilting mode, a piston-displacement mode, or both in combination. The controlled mirror array is used as a substitute for the traditional chrome on glass masks. In order to avoid constraining the system to forming edges of patterns aligned with the array of mirrors, gray-scale techniques are used for subpixel feature placement. The direct-writing of a pattern portion may rely on a single mirror mode or a combination of modes.
摘要:
The tilt and position of individually controllable element are simultaneously adjusted to allow a greater range of contrasts to be achieved. This can also be used to compensate for cupping of individually controllable elements. Simultaneous adjustment of both the position and tilt of the individually controllable elements can be achieved by two electrodes operable over a range of values.