Ai339
7. Notes on Device Handling
This section provides notes on handling CCD image sensors as optical devices implemented as a MOS
integrated circuit ( IC ).
1) Cautions to Static Electricity
You should take extreme care to Static Electricity.
As a rule, device handling should be done in EPA ( EPA : ESD Protection Area (ESD : electrostatic
discharge ) ).
If the static electricity discharges to the CCD’s pins, transfer efficiency may be reduced and other
characteristics changed depending on the voltage if the ESD.
In extreme cases, the protection circuits may break down and the device became inoperable.
(1) In dry air, since a possibility that static electricity will occur by friction becomes high, please perform
moisture control of the working space to more than 50 % RH
(2) Use of dischargers, such as ionized air, can be effective in prompting the discharge of static
electricity
(3) Since static charge of several thousand volts can accumulate due to friction between the human
body and synthetic fiber clothing, staff should always wear work clothes and uniforms made from
antistatic materials. Also, staff should wear conductive footwear.
(4) When handling CCD’s, staff should use antistatic gloves and grounded, their bodies by wearing
wrist strap connected to ground through 1MΩ resistance. Also, prevent static charges from
accumulating by spreading grounded conductive sheets on the floors and workbenches where
CCDs will be handled.
(5) Please take extreme care to Static Electricity in your assemble process line involving products
storaging.
2) Notes on Power Supply Application
Although there is a list of points that require care and attention with respect to applying the power supply
levels provided separately in the “ Note on Power supply Application” document, the conditions listed
below must also be met
(1) Do not use this device with any of the maximum ratings stipulated in the device standard exceeded.
(2) Do not apply power with the CCD pins connected incorrectly. That could result in source/drain
reversals or the protection transistors being forward biased and large currents could destroy the
inter connects on the chip.
(3) Do not use a power supply whose transient voltage levels exceed the maximum rating.
(4) Use the “Recommended Sample Circuit ( Latch – up prevention peripheral circuit example )” to
prevent latch – up from occurring. If latch – up does occur, abnormal currents may flow between
power supply terminal and GND. The heat generated may make the CCD inoperative
3) Notes on Temperature in Assembly Process and Soldering
CCD has the limit temperature as follows, based on the physical limit of materials used.
Please take care not to hearten over this temperature in your process.
Item
Limit temperature
Possible damage ( due to higher temperature than the limit )
≤ 170 ℃
Degradation of on-chip filter and lens
CCD part
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