Quality problems of fr4 pcb lead-free soldering
Although the fr4 pcb? solder paste is composed of 88-90% solder alloy ball by weight and 10-12% organic auxiliary materials, the volume ratio of the two evenly mixed is half.
Although the fr4 pcb? solder paste is composed of 88-90% solder alloy ball by weight and 10-12% organic auxiliary materials, the volume ratio of the two evenly mixed is half.
