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Some electronic components are required to operate and
store under low humidity conditions. According to statistics, more than 1/4 of
the world’s industrial manufacturing rejected products are related to moisture
hazards. For the electronic industry, the harm of humidity has become one of
the main factors of product quality control. Next, EJER will introduce you
precautions for the use of drying cabinets for electronic
components storage.
(1) Integrated circuits: the harm of humidity to the
semiconductor industry is mainly manifested in the ability of humidity to
penetrate IC plastic packaging and through gaps such as pins, and generate IC
moisture absorption phenomenon. During the heating of the SMT process, And the
moisture inside the IC expands to form steam, A pressure resulting in cracking
of the IC resin package, And oxidize the metal inside the IC device, Cause
product failure. In addition, During the welding of the PCB plate, Because of
the release of steam pressure, It will also lead to virtual welding. According
to IPC-M190J-STD-033B standards, SMD elements exposed to high humidity air, 10
times the exposure time must be placed in a drying storage cabinet below
10% RH humidity, To restore the component’s “workshop life “, Avoid scrap,
ensure safety.
(2) Electronic devices in the course of operation:
semi-finished products in the package to the next process; PCB
before and after
the package to the electrification; unsealed but not yet used IC、BGA、PCB, etc.; devices waiting for tin furnace welding; baked devices to
be returned to temperature; unpackaged finished products, etc., are exposed to
moisture.
(3) Liquid crystal devices: glass substrates, polarizers
and filters of liquid crystal devices such as liquid crystal display screens
are cleaned and dried in the production process, but they will still be
affected by moisture after cooling down, thus reducing the qualified rate of
products. Therefore, after cleaning and drying, it should be stored in a dry
environment below 40% RH.
(4) Other electronic devices, such as capacitors, ceramic
devices, connectors, switches, solder, PCB、 crystals, silicon wafers, quartz oscillators, SMT adhesives,
electrode materials adhesives, electronic slurries, high-brightness devices,
and various moisture-proof electronic devices, are exposed to damp
(5) The finished electronic machine will also be affected
by moisture during storage. If the storage time is too long in the high
humidity environment, it will lead to the failure, and for the computer card
CPU, the gold finger oxidation will lead to the bad contact failure. The harm
of humidity causes serious problems to the quality control and product
reliability of the electronic industry. Dry according to IPC-M190 standard. Visit
our website https://www.dry-cabinet.cn for more details.
