Description
Computer graphics card PCBA board
board thick:2.0mm
PCB & component assembly
copper thick:1oz
soldermask:black
silkscreen:white
surface treatment:immersion gold
PCBA board refers to the printed circuit board assembled with electronic components, and the gold finger is the gold-plated column seen at the edge of the PCB connection, and its main role is to connect, which needs to have good electrical conductivity, wear resistance, oxidation resistance and corrosion resistance. In order to increase the wear resistance of the gold finger, hard gold is usually electroplated. The gold finger needs to be chamfered, usually at 45°, or it can be other angles. The gold finger needs to do the whole solder mask opening treatment, and the PIN does not need to open the stencil. The solder pad of immersion tin and immersion silver needs to have a minimum distance of 14 mil from the top of the finger, and it is recommended that when designing, the solder pad is more than 1mm away from the finger position, including the via solder pad. There should be no copper plating on the surface layer of the gold finger, and all inner layers need to do copper reduction treatment, usually the copper reduction width is more than 3mm, and half-finger copper reduction and whole-finger copper reduction can be done.
The USB interface is a commonly used external device connection interface for connecting various USB devices such as mice, keyboards, printers, mobile hard drives, etc. The PCBA board with gold finger and USB interface is usually used in occasions where USB devices need to be plugged and unplugged frequently, such as computer motherboards, expansion cards, etc.
If you need to purchase a PCBA board with a gold finger and a USB interface, it is recommended to choose a regular manufacturer or supplier, and pay attention to checking the product's specification parameters and quality certification and other information to ensure the quality and reliability of the product.
