Glass:玻璃
Mica:
Factors to consider:
human hair:頭髮 Nylon:尼龍
Wool:毛
Silk:絲
Humidity: 濕度 Speed of separation: 分離速度 Type of material: 材料性質 Contact area: 接觸面積
Aluminum:錫 Paper:紙 Cotton:棉 Steel:銅鐵 Wood:木頭
ESD - 即靜電放電之意.指不同電位的二個物體之間產生的電荷急驟流 動的現象.
44
Conductors vs Insulators
帶靜電的導體 Charged Conductor
++ +
IC
+
+
+
++ + + + +
帶靜電的絶緣體 Charged Insulator
--
IC
++ +
-
+
-
+
-
+
Conductor evenly distributes charge over
EOS - 指一個IC材料受到超過其所能負荷的電壓,電流而遭受到破壞 的狀態
Electrostatic Discharge (ESD)-The transfer of electrostatic charge between bodies or surfaces at different electrostatic potential.ESD is a subset of EOS.
After the invention of gun powder by the Chinese,it was no longer a curiosity for anyone manufacturing that product.
靜電現象一直存在於人類歷史中,以前則被認為是一種奇特的異象
Today, special precautions are taken by industries where static sparks could cause an explosion,e.g.., flour mills,hospital operating rooms,etc ..
Amber: Hard Rubber:橡膠
Nickel,Copper,
ESD Best Practical Sharing
TITL QRA
1
Index
• ESD History • Definition of ESD Material • Reduce ESD Damaged Methodology • ESD Check list
Page 3~13 14~17 18~46 47~52
It is believed that 25% of all component failures are a result of ESD.
相信有大約25%的IC材料是因靜電(ESD)的影響而遭破壞
33
Definitions 定義
Electrical Over Stress(EOS)-The exposure of an item to a current or voltage beyond its maximum ratings.
This situation occurs when one or both of the materials are insulators.
但這種情況為發生在其中一種物質為 絕緣體
88
Increasing Positive
Triboelectric Series
Air:空氣 Human Hand:手 Rabbit Fur:兔毛
77
Fundamentals of Static - Tribocharging
磨擦產生靜電
Whenever two dissimilar materials make contact and then are separated, a static charge is created.
二種不同性質的物質碰在一起再分離也會產生靜電.
在今天,靜電所產生的破壞已引起工業界的注意.例如: 麵粉廠的 塵爆, 院的手術過程,IC製造工業等..
66
History
Strange failures occurred,and the cause of the problem was not easily seen with the optical microscopes-failure analysis read : cause unknown.
discharges when grounded.
Grounding an insulator neither removes
charge or prevents surface charges.
55
History
Static electricity has been a curiosity for many hundreds of years.
entire surface
平均分佈於整個表面
Opposite polarity charges can
exist on the same insulator.
不同極性的電荷會同時存在絶緣體上
IC
- - - IC
-
-
-
Conductor completely
Insulatoars do not allow charge to flow.
靜電造成一些奇特而不易察覺的破壞,F/A分析的結論往往是: 原因 不明.
EOS/ESD is perhaps the most significant failure mechanism in the electronics industry today.
EOS/ESD對半導體之元件的破壞,可能是當今半導體界最頭痛, 也 是最嚴重的一個問題.
22
Why Do We Need ESD Training?
為何需要此ESD訓練課程?
Reminder that ESD is a serious proБайду номын сангаасlem in the entire electronics industry.
提醒所有員工“靜電”對IC材料的破壞是一個非常嚴重的問題, 它是整個半 導體所面臨的一項挑戰.