Jun Cheng While performing CVD Parylene deposition onto gold wires, the use of an A-174 silane adhesion promoter as a pre-treatment may help in establishing good adherence. This promotes chemical bonding and enhances the reliability of the bond between Parylene and gold surfaces.
Golda-Cepa, Monika, Klas Engvall, Minna Hakkarainen, and Andrzej Kotarba. "Recent progress on parylene C polymer for biomedical applications: A review." Progress in Organic Coatings 140 (2020): 105493.
Jun Cheng thanks for reaching out! I'm glad the info about the A-174 silane adhesion promoter was helpful. I haven't had experience with cleaning gold surfaces myself. I'd suggest checking out books or literature for more about gold surface cleaning methods.