Patent ID: 9155816
Filing Date: 2015-10-13
Classification: A61L,C23C

Abstract:
1. A manufacturing method of a magnesium-based medical device, wherein the magnesium-based medical device has a base material made of magnesium or a magnesium alloy and is dissolved and disappears in a living body, wherein a corrosion-resistant film is formed on a surface of the base material, wherein variation in a numerical value of hardness of the formed film expressed in terms of Vickers hardness is controlled corresponding to a desired corrosion resistance, wherein the magnesium-based medical device has an in-plane direction, and wherein a degree of variation in a numerical value of hardness of the formed corrosion-resistant film which is expressed in terms of Vickers hardness in the in-plane direction is adjusted by controlling the flow speed of the solution relative to the surface of the base material, the method comprising: immersing the base material in a solution in which components for forming the corrosion-resistant film are dissolved; and in a state that the base material is immersed in a solution, depositing a corrosion-resistant film on the surface of the base material by generating a flow of the solution which has a flow speed relative to the surface of the base material,