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In order to improve the reliability and service life of storage products, electronic moisture-proof cabinets use intelligent microcomputer management to improve the maintainability and integrity of the configuration, so that various fine configurations and electronic devices are always in good performance. With the increasing use of dense pitch and ball grid array devices, the quality control requirements for moisture sensitive devices are becoming more stringent.
However, several commonly used methods of controlling humidity have deficiencies. First, the method of baking is adopted. The long-time baking has a thermal effect on the packaging materials and metal parts, which tends to cause the electronic components to age. When the temperature is returned to the oven, it will return to the moisture. Repeated baking is more undesirable, and the temperature is out of control. risk. In addition, the use of desiccant, but the desiccant is unstable, the suction is slow, it is difficult to control the humidity change, obviously can not meet the processing requirements of the electronics industry for humidity sensitive components. Or use a nitrogen cabinet, to the gas source, equipment, pipelines, not only high operating costs, but also may cause space oxygen deficiency, in fact, nitrogen can only replace the air in the cabinet, and can not remove the moisture inside the electronic device. If the exposed components in the humid air are placed in a 10% RH room temperature drying oven for 10 times of exposure time, they are placed in a 5% RH room temperature drying oven to restore the original state 5 times. It is the simplest, most effective, safe and reliable method.
Therefore, the electronic moisture-proof box (or electronic humidity control cabinet) is applied to the electronics industry, but the general electronic moisture-proof box is difficult to fall below 10% RH, or it takes a long time. Due to the large-scale production, it is necessary to take and place components frequently. Once the door is opened, the moisture enters immediately and the humidity is difficult to recover, which is not suitable for production field applications.
The hazards of moisture exist in all walks of life, and their impact on the electronics industry is as follows.
1. The wafer or die semi-finished product is in the unsealed state, and the thin film field effect transistor-LCD glass substrate is damp and moldy during stack storage.
2. The “golden finger†splashing tin caused by the explosive exhaust of the PCB substrate during reflow;
3. Oxidation of metal parts of optical fiber K-gold joints, Bonding gold wire materials, Leadframe copper materials and other devices
4, IC (including QFP / Ball Grid Array / CSP) integrated circuit and other components in the internal oxidation short circuit during storage, internal micro-cracking, separation and delamination, external "popcorn".
Electronic moisture box performance
The electronic moisture-proof test chamber is an industrial equipment. It is a dehumidification platform established according to the development of military high-tech equipment, which can meet the humidity requirements of various fine configurations and electronic device storage. Electronic moisture-proof cabinet is specially used to store fine management of classification management, advanced lens, photographic equipment, optical equipment, electronic devices, integrated circuit boards, SMT, microcomputer chips and other electronic materials and configurations to prevent mold, fog, rust and corrosion. Deformation, aging breakage, failure of electronic components, etc.