Home >> FAQ
Q: About poor adhesion of coating ?
A: -Pretreatment not good enough -Pre coating is too thin -Poor conductive -The copper content of the electroplate liquid is not enough
Q: About the surface color change (especially when the weather is hot and humid ) ?
A: -Gold plating layer cleaning is not enough. -The thickness of nickel plating layer is not enough. -The gold plating liquid is polluted by metal or organic matter. -The nickel layer purity is not enough. -The gold plates are stored in a corrosive environment. -Strengthen the plating after cleaning. -Nickel layer thickness is not less than 2.5 microns. -Strengthening the purification of gold plating solution. -To strengthen the nickel plating bath to remove impurities. -The gold plating layer should be away from the corrosive atmosphere environment preservation, the color layer can be removed by 5-15%H2SO4.
Q: About RFQ documents required ?
A: -PCB Gerber file or PCB file -Order quantity required -Thickness of PCB plate -The copper thickness required -Surface treatment(spray tin, lead-free spray tin, immersion gold, gold, OSP...) -Solder color is green or black or the others (red, yellow, blue, white...)
Q: About package ?
A: Vacuum package
Q: About Payment Terms ?
A: 30% T/T deposit, 70% balance against shipping documents copies.
Q: About Delivery and Shipment ?
A: The shipping way clients required can be chosen: sea freight, air freight, express DHL, Fedex, TNT, UPS.

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