Table of Contents
Advertisement
Preventing electrostatic damage to equipment
Many electronic components are sensitive to ESD. Circuitry design and structure determine the degree of
sensitivity. The following packaging and grounding precautions are necessary to prevent damage to electric
components and accessories.
●
To avoid hand contact, transport products in static-safe containers such as tubes, bags, or boxes.
●
Protect all electrostatic-sensitive parts and assemblies with conductive or approved containers
or packaging.
●
Keep electrostatic-sensitive parts in their containers until they arrive at static-free stations.
Place items on a grounded surface before removing them from their containers.
●
Always be properly grounded when touching a sensitive component or assembly.
●
Avoid contact with pins, leads, or circuitry.
●
Place reusable electrostatic-sensitive parts from assemblies in protective packaging or conductive foam.
●
Personal grounding methods and equipment
Use the following equipment to prevent static electricity damage to equipment:
Wrist straps are flexible straps with a maximum of 1 MΩ ±10% resistance in the ground cords. To provide
●
proper ground, a strap must be worn snugly against bare skin. The ground cord must be connected to
the banana plug connector on the grounding mat or workstation and fit snugly into it.
Heel straps/Toe straps/Boot straps can be used at standing workstations and are compatible with most
●
types of shoes or boots. On conductive floors or dissipative floor mats, use them on both feet with a
maximum of 1 MΩ ±10% resistance between the operator and ground.
Table 3-2
Method
Antistatic plastic
Carbon-loaded plastic
Metallized laminate
Grounding the work area
To prevent static damage at the work area, observe the following precautions:
●
Cover the work surface with approved static-dissipative material. Provide a wrist strap connected to
the work surface and use properly grounded tools and equipment.
●
Use static-dissipative mats, foot straps, or air ionizers to give added protection.
Handle electrostatic-sensitive components, parts, and assemblies by the case or PCB laminate. Handle
●
them only at static-free work areas.
Turn off power and input signals before inserting and removing connectors or test equipment.
●
Use fixtures made of static-safe materials when fixtures must directly contact dissipative surfaces.
●
26
Chapter 3 Routine care, SATA drive guidelines, and disassembly preparation
Static shielding protection levels
Static Shielding Protection Levels
Voltage
1,500
7,500
15,000
Advertisement
Table of Contents
