Part A: Introduction of ESD

Creating Charges – 静电如何产生

n A. Tribogeneration – 接触摩擦分离起电

n B. Polarization/Induction - 极化/感应起电

n C. Conduction - 传导

Part A: Introduction of ESD

Part A: Introduction of ESD

o Factory – static generators exist in everywhere

- 静电无处不在

n Operators: clothes, shoes, hair, walking, sitting 衣服,鞋子,头发, 行走,就座

n Workstation: table top, chair 桌面,椅子

n Flooring: carpet, tile, vinyl, concrete 地毯,瓷砖,塑料,混凝土

n Packaging: bags, tapes, trays, foam..包,带子,盒子,泡沫

n Hardware, hand tools, tweezers, soldering irons…仪器部件,工具,

镊子,电烙铁

n Components 组件

n Equipment 设备

n Special note: conductors (metal to metal contacts) 导体

Part A: Introduction of ESD

  Electrostatic will cause - 静电造成的影响

n ESD, the rapid transfer of charge between objects at diffferent potentials,

o The energy of this fast transfer dissipates as heat,

o Melt some critical part of components, gates,

n ESA – Electrostatic Attraction (静电吸附)

n EMI – Electromagnetic Interference (电磁波干扰)

Part A: Introduction of ESD

ESD damages - 静电造成电子产品损害的二个方式

n A. Discharge: When two objects with different charges are brought together, the charges move between the objects until both objects have the same charges. This discharge will produce energy to destroy pathways and gates inside components.

It could damage on either objects through this unwanted and un-controllable discharge.

- 电荷泄放：当两个承载不同电荷的导体放置在一起，既会产生电荷移动，直至两者拥有等量电荷。电荷泄放会对组件造成损害。

n B. Fields: Electronic components damage from fields occurs from either current induced into the circuit or from discharge occurring from a charged object after polarization.

- 电场感应：感应电流形成电路和极化作用后的载荷物体均会对电子组件造成损害。

Part A: Introduction of ESD

n Catastrophic failure - 立即性伤害 (Quality)

n Parametrical failure - test ok at border limits, but then failed at stress test.

n Latent failure - 潜伏性伤害 (Reliability)

n Static Loss