My review of the recent PCB order
PCB order placed online, manufacturer used own gerbers, 4-layer design, 50 x 94 mm, 1.2mm thick, 1-OZ copper, ENIG finish, 20pcs, excellent gerber viewer, quick shipping, missing solder paste stencil.
ENIG
Distinguishing Between PCB Gold Plating and ENIG Processes
The surface treatment processes for PCB boards include various methods such as tin spraying, lead-free tin spraying, enig, and hard gold plating, all of which aim to achieve low cost, good weldability, harsh storage conditions, short time, environmentally friendly process, good welding, and flatness. Gold finger plates require patterning gold or ENIG processes due to their antioxidation properties and high conductivity, with ENIG being the more popular choice due to its better weldability, control of stress, resistance to oxidation, and better flatness.
Distinguishing Between PCB Gold Plating and ENIG Processes Read More »
“Surface mountable link design – NO and NC can only be achieved through paste screen application.”
The passage discusses the creation and testing of surface solderable links for prototype circuits. The author explores the idea of using solderable links instead of 0R resistors to provide different configurations for circuits on a board. They admit uncertainty about the effectiveness of the approach and invite suggestions.
Which service should be used for QFN and QFP, HASL or ENIG?
The speaker is questioning the preference for immersion gold finish over HASL for soldering QFN and QFP components.
Which service should be used for QFN and QFP, HASL or ENIG? Read More »
ENIG test pad with or without solder paste
Working with a 4-layer PCB with ENIG surface finish for QFN components, considering stencil opening for solder paste on circular pads for post-assembly testing, seeking advice on reliability and conductivity concerns.