Lithographical patterning on the surface of a fine pipe with a thin wall is required for fabricating three-dimensional micro-parts. For this reason, a new exposure system was developed for printing patterns on a cylindrical pipe. In the exposure system, the pipe was rotated 360° synchronous to a linear scan of a reticle. Stent-like resist patterns with a mean width of 185 μm were printed on a surface of stainless-steel pipe 2 mm in diameter. Next, the patterned pipe was chemically etched and stent-like meshed pipes with a mean mesh width of 110 μm were fabricated.
Lithographical patterning on the surface of a fine pipe with a thin wall is required for fabricating three-dimensional
micro-parts. For this reason, a new exposure system for printing patterns on a cylindrical pipe by synchronous rotary
scan-projection exposure was developed. Using the exposure system, stent-like resist patterns with a width of 251 μm
were printed on a surface of stainless-steel pipe with an outer diameter of 2 mm. The exposure time was 30 s. Next, the
patterned pipe was chemically etched. As a result, a stent-like mesh pipe with a line width of 230 μm was fabricated. It
was demonstrated that the new method had a potential to be applied to fabrications of stent and other cylindrical
micro-parts.
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