Factors that affect the surface resistance of the board include the board material, the presence of coatings such as solder masking or conformal coatings, and board cleanliness.
影响印制板表面电阻的因素包括印制板材料、有无涂层(例如防焊漆或保形涂层)，以及电路板的清洁。
2
The influence factors of the surfacecleanlinessof cold-rolled sheet are introduced and the reasons and composition of the post-annealing black stain and edge carbon are mainly analyzed.
对冷轧板表面清洁度的影响因素进行了综述，并重点探讨了退火黑斑和边缘碳的组成和成因。
3
A great deal of tests show that the finishing equipment has a very good effect on reducing crank's surface roughness, increasing its microhardness and cleanliness.