參數(shù)資料
型號: TMDS3788844
廠商: Texas Instruments, Inc.
英文描述: 3M710 INSERTION CUT TOOL
中文描述: TMS370微控制器系列數(shù)據(jù)手冊
文件頁數(shù): 60/78頁
文件大小: 919K
代理商: TMDS3788844
ESD LABELS AND SIGNS IN WORK AREAS
3–6
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
ESD labels and signs in work areas
ESD caution signs at workstations and labels on static-sensitive parts and containers must be consistent in
color, symbols class, voltage-sensitivity identification, and appropriate instructions. Signs must be posted at all
workstations performing operations with static-sensitive items. These signs must contain the following
information or its equivalent.
CAUTION
STATIC CAN DAMAGE COMPONENTS
Do not handle ESD-sensitive items unless grounding wrist strap
is properly worn and grounded. Do not let clothing or plain plastic
materials contact or come in close proximity to ESD-sensitive
items.
Labels must be affixed to all containers containing static-sensitive items at a place readily visible and proper
for the intended purpose. Additionally, labels must be consistently placed on containers and packages at a
standard location to eliminate mishandling. Use only QC-accepted and approved signs and labels to identify
static-sensitive products and work areas. The use of ESD signs and labels and their information content must
be the responsibility of the area supervisor to ensure consistency and compatibility throughout the
static-sensitive routing.
relative humidity control
Since relative humidity has a significant impact on the generation of static electricity, when possible, the work
area must be maintained within the 40%–60% relative humidity range.
preparation for working at static-free workstation
A workstation with a static dissipative work surface connected to ground through a 1 M
±
10% resistor, a
grounding wrist strap with the ground wire connected to the conductive work surface, and an ionizer constitute
a static-free workstation (Figure 1). An operator is grounded properly when the wrist strap is in snug (no slack)
contact with the bare skin, usually positioned on the left wrist for a right-handed operator. The wrist strap must
be worn the entire time an operator is at a static-free workstation. The operator must touch the grounded bench
top first before handling static-sensitive items. This precaution must be observed in addition to wearing the
grounding wrist strap. If possible, the operator must avoid touching leads or contacts even though he or she
is grounded.
CAUTION
Personnel must never be attached to a static-free workstation
without a properly worn and grounded wrist strap (the presence
of the 1 M
±
10% series resistor in the ground wire).
An operator’s clothing must never make contact or come in close proximity with static-sensitive items. Operators
must be especially careful to prevent any static-sensitive items (being handled) from touching their clothing.
Long sleeves must be rolled up or covered with antistatic sleeve protector banded to the bare wrist, which must
“cage” the sleeve at least as far up as the elbow. Only antistatic finger cots can be used when handling
static-sensitive items.
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