25-02-2021 дата публикации
Номер: US20210052781A1
Transfer rings for use in coating substrates and methods of utilizing same are disclosed. The transfer rings disclosed herein are useful in efficiently moving a plurality of substrates between different process chambers. For instance, the transfer rings are designed to collectively move a plurality of stents between coating and sintering chambers. 1. A method of coating a plurality of medical devices comprising:mounting the medical devices to a transfer ring to create a construct;placing the construct within a first coating chamber;coating the medical devices with a first material;removing the construct from the first coating chamber;placing the construct within a sintering chamber; andsintering the medical devices,wherein the transfer ring does not negatively impact the sintering step.2. The method of claim 1 , further comprising the steps of placing the construct in a second coating chamber and coating the medical devices with a second material.3. The method of claim 2 , wherein the placing steps are performed by a robot or a machine driven arm.4. The method of claim 2 , further comprising the step of removing the coated medical devices from the transfer ring.5. The method of claim 4 , further comprising the steps of rotating the transfer ring during the coating steps.6. The method of claim 5 , wherein the first and second coating chambers impart a rotational force on the transfer ring.7. The method of claim 1 , wherein the mounting step includes mounting the medical devices on holders to the transfer ring.8. The method of claim 1 , wherein the mounting step includes mounting 2-64 medical devices to the transfer ring.9. The method of claim 2 , wherein the first material is a polymer and the second material is a drug in crystalline form.10. The method of claim 9 , further comprising repeating the placing claim 9 , coating and sintering steps to create a multilayer coating on the medical devices.11. The method of claim 10 , wherein the coating includes three layers ...
Подробнее
