940MWO4C Datasheet, PDF (4/10 Pages) HB Electronic Components – LED

Leds Application Manual
1. Anti-static Note and Methods
InGan or GaN blue, green, white leds must avoid static electricity damage. When
operating, remove any static electricity source; clear up static electricity; expedite the
dissipation of electric charge. In most cases, static electricity arises from leds lead
forming, installing, soldering and cleaning.
Main methods preventing static electricity
z Paving floor with anti-static floor board, installing earth connecting dissipation
system as well. (Surface Resistivity: 106Ÿ~109Ÿ/c ΃)
z Using static electricity sensitive parts on anti-static work table, basic earthing
requirement:
Surface Resistivity: 106Ÿ~109Ÿ/c ΃
Triboelectrification potential: ” 100V
Body Resistivity: 103Ÿ~108Ÿ/c ΃
Static electricity voltage attenuation time: ”0.5S
z Applying static electricity sensitive parts in effective scope (within 60cm generally)
of working uniflow ionic blower.
z Relative Humidity in static preventing zone should be over 50%, better ranking
70%~80%.
z Separating ground, wall, working table, equipment, instrument and wrist strip
according to working area and unit, earthing in sequence, and then converging into
assemble line connecting with ground.
z In static preventing area, instruments like container, clamp, instruments underlay,
electric iron etc should all comply with anti-static electricity standard. In the mean
time, operator must wear anti-static electricity jumper, shoes, hat and using
anti-static electricity wrist strips, elbow or ankle strap.
z Do not use nylon bag, ordinary plastic bag or ethane material pack static electricity
sensitive parts.
z Static electricity sensitive parts must be packed under anti-static electricity box or
carton before it is shipped or transported.
z In transportation or passing, avoid mechanical vibration and strike.
z In Storage of static electricity sensitive parts or PCB fixing static electricity sensitive
parts or whole machine, necessary anti-static electricity measures should be
taken.
If leds damaged by static electricity, some poor performance appears, such as
creepage current increasing, static forward voltage decreasing or increasing, no
lighting or lighting abnormally under low current test.
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