HBM, MM, CDM 3가지 모델이 있으며, 각각의 테스트에 해당하는 테스트 회로와 입력 stress 파형의 조건이 다르다.
파형은 rise time (Tr), delay time(Td), 입력 전류 최대치(Ipeak) 가 각각 다르다.
아래 각각의 파형에 기준치가 기록이 되어 있다.
1. HBM (Human Body Model)
2. MM (Machine Model)
Two examples of industry standards that define MM ESD testing are JEDEC’s JESD22-A115 and ESD Association’s ESD STM5.2: Electrostatic Discharge Sensitivity Testing — Machine Model.
Two examples of industry standards that define CDM ESD testing are JEDEC’s JESD22-C101 and ESD Association’s ESD STM5.3.1: Electrostatic Discharge Sensitivity Testing — Charged Device Model
4. ESD Sensitivity Classfication Levels
Table 1. ESDS Component Sensitivity Classification – Human Body Model
(Per ESD STM5.1-1998*)
Class | Voltage Range |
|---|---|
Class 0 | < 250 volts |
Class 1A | 250 volts to < 500 volts |
Class 1B | 500 volts to < 1,000 volts |
Class 1C | 1000 volts to < 2,000 volts |
Class 2 | 2000 volts to < 4,000 volts |
Class 3A | 4000 volts to < 8000 volts |
Class 3B | > = 8000 volts |
Table 2. ESDS Component Sensitivity Classification – Machine Model
(Per ESD STM5.2-1999*)
Class | Voltage Range |
|---|---|
Class M1 | < 100 volts |
Class M2 | 100 volts to < 200 volts |
Class M3 | 200 volts to < 400 volts |
Class M4 | > or = 400 volts |
Table 3. ESDS Component Sensitivity Classification – Charged Device Model
(Per ESD STM5.3.1-1999*)
Class | Voltage Range |
|---|---|
Class C1 | <125 volts |
Class C2 | 125 volts to < 250 volts |
Class C3 | 250 volts to < 500 volts |
Class C4 | 500 volts to < 1,000 volts |
Class C5 | 1,000 volts to < 1,500 volts |
Class C6 | 1,500 volts to < 2,000 volts |
Class C7 | =>2,000 volts |
출처: http://www.siliconfareast.com/esd.htm