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ESD 모델

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)


The HBM pulse peak current at 400 V must be 0.27 +/- 10% A


Three examples of industry standards that define HBM ESD testing are JEDEC’sJESD22-A114, the  MIL-STD-883 Method 3015 and  ESD Association’s ESD STM5.1: Electrostatic Discharge Sensitivity Testing — Human Body Model


2. MM (Machine Model)


The MM peak current at 400 V must be 5.8 +/- 20% A




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.



3. CDM (Charged Device Model)


The CDM peak current at 400 V must be 2.1 +/- 20% A


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


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