The thermal effect the tube, the axial material and its process manner where minute form was formed with minimum

摘要

PPROBLEM TO BE SOLVED: To provide a stent processing method, where there is no possibility of occurrence of either thermally effected layer or fused coagulant matter through laser irradiation, and the fear of adhesion of blood platelets or damages to vessels or red blood cells is reduced. PSOLUTION: The stent processing method includes: an insulating film is formed over the entire external surface of a metallic tube; next, the insulating film for the tube part to form a pattern hole is removed; next, the pattern hole is formed after removing the metal there by electrolytic processing; a passive film is formed over the entire inner surface of the pattern hole while the electrolytic processing continues; when the passive film becomes active as an insulating film, this film is removed from the bottom of pattern hole by laser irradiation; next, metal is removed by electrolytic processing from the bottom of pattern hole where the insulating film has been removed; and thereafter, electrolytic processing and laser irradiation are repeated until the pattern hole completely opens. PCOPYRIGHT: (C)2011,JPO&INPIT