Toshiba Semiconductor - Manual (Page 24)

[6] Handling Guide
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3.6.6 Interference from Light (ultraviolet rays, sunlight, fluorescent lamps and incandescent
lamps)
Light striking a semiconductor device generates electromotive force due to photoelectric effects. In
some cases the device can malfunction. This is especially true for devices in which the internal chip is
exposed. When designing circuits, make sure that devices are protected against incident light from
external sources. This problem is not limited to optical semiconductors and EPROMs. All types of
device can be affected by light.
3.6.7 Dust and Oil
Just like corrosive gases, dust and oil can cause chemical reactions in devices, which will adversely
affect a device’s electrical characteristics. To avoid this problem, do not use devices in dusty or oily
environments. This is especially important for optical devices because dust and oil can affect a
device’s optical characteristics as well as its physical integrity and the electrical performance factors
mentioned above.
3.6.8 Fire
Semiconductor devices are combustible; they can emit smoke and catch fire if heated sufficiently.
When this happens, some devices may generate poisonous gases. Devices should therefore never be
used in close proximity to an open flame or a heat-generating body, or near flammable or combustible
materials.
3.7 Disposal of Devices and Packing Materials
When discarding unused devices and packing materials, follow all procedures specified by local
regulations in order to protect the environment against contamination.