Method and apparatus for forming a tubular article having a perf

Details Method and apparatus for forming a tubular article having a perf Method and apparatus for forming a tubular article having a perf

1996-05-30

1999-01-05

Breneman, R. Bruce

Etching a substrate: processes

Forming or treating cylindrical or tubular article having...

216 56, 216 48, 216 94, 156345, 15665911, 623 1, B44C 122, C23F 102

Patent

active

058558020

ABSTRACT:
A method for forming a tubular article having a perforated annular wall, such as a surgical stent, includes coating the exterior and interior cylindrical surfaces of a tubular member with a photoresist, exposing selected portions of the photoresist coated surfaces to light, developing the coating, and then etching the coating to remove unexposed portions of the coating and immediate underlying portions of the annular wall, thereby forming a tubular article having a wall structure defined by a skeletal framework. An apparatus for exposing a light-sensitive coating to a tubular article includes means for rotating and translating the article with respect to a light source, along a longitudinal axis and simultaneously exposing aligned portions of the interior and exterior cylindrical surfaces of the tubular member. The method and apparatus embodying the present invention are particularly suitable for forming stents that support the walls of weak human arteries.

REFERENCES:
patent: 5139480 (1992-08-01), Hickle et al.
patent: 5197978 (1993-03-01), Hess
patent: 5266073 (1993-11-01), Wall
patent: 5269882 (1993-12-01), Jacobsen
patent: 5344426 (1994-09-01), Lau et al.
patent: 5395718 (1995-03-01), Jensen et al.

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