PCB Blogger-China PCB Factory,HOYOGO

      Ceramic PCB is to combine copper foil and ceramic substrate by bonding in a high temperature environment. In this way, the bonding force is strong, not only the copper foil will not fall off, but also the reliability is high, and various performances are still stable in the environment of high temperature and high humidity. So what are the materials of ceramic PCB? What are the reasons for using this material?       1.  A luminium  O xide  ( Al 2 O 3 ) A luminium  O xide  is a commonly used material in ceramic PCB, because it has better mechanical, thermal and electrical properties than other ceramic materials, good stability, and rich sources of raw materials, so it is suitable for a variety of technical manufacturing and different shapes. In addition, attention should be paid to the content of aluminum oxide, although the electrical properties are hardly affected, the changes of mechanical property and thermal conductivity are big.     2.  B eryllium  O xide  (BeO) The thermal

       In PCB processing, the patch adhesive has strong adhesion to the metal end, and the cured adhesive layer has good water resistance, oil resistance, high temperature resistance, and aging resistance. Do you know what its curing process is?   There are different types of patch adhesives and different curing processes.   There are two commonly used curing processes - thermal curing and light curing.       1.  PCB  H eat  C uring The curing process of epoxy resin patch  adhesive   is thermal curing. It can be thermally cured in two ways, namely, the oven intermittent type and the reflow oven continuous type.     Oven intermittent curing is to add patch adhesive and mount SMD on the designated position of the PCB, and then put it into a constant temperature oven in batches, and then set the temperature and time according to the curing parameters of the SMD adhesive used.   This curing method is simple to operate, but its production efficiency is low.     Continuous curing in reflow o

       When the temperature rises to a certain critical value, the PCB substrate will change from a glass state to a rubber state.  The critical value of this temperature is the Tg value, so why use a high Tg PCB, and what are the specific advantages?       1.  H eat  R esistance The high-density mounting technology represented by SMT and CMT makes the PCB more and more inseparable from the high heat resistance support of the base material in terms of small aperture, circuit refinement and thinning. Ordinary Tg boards will soften and deform at high temperatures, while high Tg PCB have better heat resistance and can still maintain excellent physical and mechanical properties under high temperature conditions.     2.  M oisture  R esistance Moisture is destructive to the PCB and can greatly reduce the insulation resistance between conductors . Compared with ordinary PCB, high Tg PCB have better moisture resistance.     3. Stability With the development of the electronics industry, many e