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, NetDry 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.

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.