Leadless surface mount components and components have a small coefficient of thermal expansion (ceramic thermal expansion coefficient is 610/e) and common printed wiring boards (including epoxy glass substrates and polyimide glass substrates) have a large thermal expansion coefficient. (for 1510/e). The difference between the two is very large. The stress concentration of the solder joint 4 in the temperature cycle will continue to increase to avoid connection with the metallization. Exceeding the mechanical fatigue limit of the solder or exceeding the mechanical strength of the solder will cause cracking, electrical interconnection. Bad, the whole machine has a malfunction. The TCE and thermal conductivity coefficient of the plate Z-guided thermal coefficient polyimide metal core multi-layer epoxy glass cloth laminate modified double maleimide plate in the development process, the following special tests were first carried out. The uniformity of the thickness of the copper layer, the CIC composite metal copper layer produced by the hot smelting method can be relatively uniform, and the thickness of the copper layer of the CIC composite metal produced by the electroplating method is poor, but the anode-anode distance, the solution stirring or the cathode movement are increased. Can be improved to meet the requirements of this topic. Modified bismaleimide prepreg lamination, process test and thickness control The prepreg and copper clad sheet used in this subject are epoxy modified bismaleimide glass cloth prepreg newly developed by the Ministry of Electronics and 15 Copper clad sheet. Compared with epoxy glass cloth, this material has the highest working temperature and high operating temperature. Compared with Tg imide, Tg imide has higher heat resistance (Tg>250e) and copper foil. Compressible molding; gel time controllable, long shelf life (>9 months) and post-cure properties at lower temperatures (200e240e). Compared with the traditional toilet cover, the Square Bidet Toilet Seat has been greatly upgraded in terms of appearance and function. Its appearance design is more modern, concise and grand, which can better match the modern bathroom decoration style. Square Bidet Toilet Seat, Intelligent Toilet Seat, Square Toilet Seat, Square Heated Toilet Seat Guangdong Fabia Intelligent Technology Co., Ltd , https://www.fabiaintelligent.com
In terms of function, the square Smart Toilet seat usually integrates a variety of intelligent functions. For example, it can be automatically cleaned and flushed, so that users do not need to manually clean, which improves the hygienic safety of use. At the same time, the square bidet toilet seat can also adjust the water temperature and water pressure, and adjust the temperature and intensity of flushing water according to the needs of users to achieve a more comfortable use experience. In addition, some advanced models of square smart toilet covers are also equipped with a warm air drying function, which can help users dry quickly after use to avoid being troubled by moisture.
In short, the square smart toilet seat is a high-end bathroom product that integrates a variety of intelligent functions. It not only improves the convenience and comfort of use, but also has the characteristics of being more environmentally friendly, energy-saving and hygienic.