APPARATUS AND METHOD FOR FIELD-INJECTION ELECTROSTATIC SPRAY COATING OF MEDICAL DEVICES

摘要

An apparatus and method for field-injection electrostatic spray deposition of medical devices like stents. The apparatus includes a medical device holder, which applies a first electrical potential to the medical device, and an electrically insulative electrostatic spray dispensing device having an electrically conductive electrode, which applies a second electrical potential, creating an electrical potential difference sufficient to attract charged coating material particles emitted from an orifice of the dispensing device toward the medical device. The electrode may be sharpened to create a localized, high-strength electric field to improve the charge injection into the coating material or coating solution.