It is very different from general cylinder in its construction and is made by twining steel wire with a fixed spiral pitch and direction.
它是由钢丝条按一定螺旋方向和螺距缠绕而成,钢丝条之间的间隙成为筛孔。
2
As the demand increasing steadily for small volume, high density and high heat-dissipation rate IC, the key parameter of wire bonding — pad pitch has to shrink in accordance.