Page 77 - Kingbright 2022-2023 catalog

TECHNICAL NOTES

Conventional pad Pad design for 10. It is not recommended to assemble LEDs of different color or intensity
improved heat dissipation bins together, as there may be perceivable color or intensity variation.
Cu-area
Each bag contains parts from the same bin code. The bin code is
printed on the bag’s label as below.
Solder points(Cu)

Solder resist
Do not use this area for electrical contact
Restrictions on Product Use
1. Not all devices and product families are available in every country.
2. The light output from UV, blue, white, and other high-power LEDs 11. For the 0603, 1005 and 1608 series, an ESD ionizer should be used
may cause injury to the human eye when viewed directly. during SMT pick-and-place process to neutralize the charge and
3. LED devices may contain gallium arsenide (GaAs) material. GaAs is hence reduce electrostatic attraction.
harmful if ingested. GaAs dust and fumes are toxic. Do not break, 12. Please do not apply stress directly to the LED during handling.
cut, or pulverize LED devices. Do not dissolve LEDs in chemical 13. As silicone encapsulation is permeable to gases, some corrosive
solvents. substances such as H2S might corrode silver plating of leadframe.
4. Semiconductor devices can fail or malfunction due to their sensitivity Special care should be taken if an LED with silicone encapsulation is
to electrical fluctuation and physical stress. It is the responsibility of to be used near such substances.
the user to observe all safety standards when using Kingbright 14. The LEDs should not be exposed to an environment where high level
products, in order to avoid situations in which the malfunction or of moisture or corrosive gases are present.
failure of a Kingbright product could cause injury, property damage, 15. Prolonged reverse bias should be avoided, as it could cause metal
or the loss of human life. In developing designs, please insure that migration, leading to an increase in leakage current or causing a
Kingbright products are used within specified operating conditions as short circuit.
set forth in the most recent product specification datasheet. 16. Choosing the right feeder for small SMD components:
5. For LEDs with silicone encapsulation such as the AA series, the 16.1 When processing smaller SMD components (such as 0603,
outer diameter of the pick-up nozzle must be longer than that of the 1005, 1608, 1612, 1615, 2012), please use feeder with block to
LED’s light emitting area. i. e. A >C, and B shall be shorter than the hold the part in place during cover tape removal, in order to
width of the LED. prevent the component jumping or turning within the tape due to
vibration or static cling.
16.2 Feeder without block is more suitable for larger size components
(such as 3216, 3528).
16.3 Please insure the removed cover tape is properly threaded
through the feeder as it is removed from the tape.

A is the outer diameter of the pick-up nozzle
B is the inner diameter of the pick-up nozzle
C is the diameter of lens
6. The size of the nozzle should be as large as possible if the tape is
not involved.
7. The LEDs should not be exposed to an environment where high level
of moisture or corrosive gases are present.
8. Prolonged reverse bias should be avoided, as it could cause metal
migration, leading to an increase in leakage current or causing a
short circuit.
9. Excess driving current and/or operating temperature higher than
recommended conditions may result in severe light degradation or
premature failure.
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