Ceramic circuit board PCB is a kind of heat-conducting ceramic powder and an organic binder, and the heat conduction organic ceramic PCB is prepared at a thermal conductivity of 9-20W/m. In other words, ceramic PCB is a printed circuit board with a ceramic base material, which is highly thermally conductive materials such as alumina, aluminium nitride, as well as beryllium oxide, which can make a quick effect on transferring heat away from hot spots and dissipating it over the whole surface. Circuit designers in new jersey are fabricated with LAM technology, which is a laser rapid activation metallization technology. So ceramic PCB is highly versatile that can take place of the entire traditional printed circuit board with a less complicated construction with enhanced performance.
Types of ceramic PCBs
There are three main types of ceramic PCB in the electronic market based on the manufacturing method.
High-temperature ceramic PCB
As you know, high temperatures may be the most popular type of pf ceramic. In general, The ceramic PCB designed for high temperatures is often regarded as a high temperature co-fired ceramic (HTCC) circuit, which is made up of raw ceramics with solvent, mixing adhesive, plasticizer, lubricant as well as aluminium oxide. First, it fabricates with the raw ceramic material, secondly coats the material, and then carries out the circuit tracing on tungsten or molybdenum metals. Finally, if the circuit tracing is achieved, it can bake the boards between 1600 and 1700 degrees Celsius for up to 48 hours after lamination. All HTCC baking is done in a gaseous environment, such as in hydrogen gas.
Low-temperature ceramic PCB
Unlike HTCC, low temperature co-fired ceramic PCB is made up of combining crystal glass with an adhesive substrate on sheet metal with gold paste. And then cut and laminate the circuit board before placed in a gaseous oven at roughly 900 degrees Celsius. Low temperature co-fired ceramic PCB profits by less warpage and evolutionary shrink tolerance. In other words, comparing to HTCC and other types of ceramic PCB, ceramic PCB has s better mechanical intensity and thermal conductivity. So as using the heat dissipation products such as LED lights, there is an advantage for the thermal benefit of LTCC.
Thick film ceramic PCB
Thick film ceramic PCB, the thickness of its conductor layer may exceed 10 microns, but not more than 13 microns. In general, the conductor layer is printing the silver or gold-palladium on the surface of ceramic PCB. Thick film ceramic PCB includes gold and dielectric pastes, which are done on a ceramic base material, and the pastes and backed at a temperature of 1000 degrees Celsius or below after working. So, the thick film ceramic PCB is widely used by most PCB manufacturers because of the high cost of gold conductor paste.
Heat dissipation is the key benefit that ceramic has over more conventional materials such as FR-4 and metal-clad PCB. Because the components are placed directly on the boards, and there is no isolation layer, the flow of heat through the boards is far more efficient. In addition, the ceramic material can suffer from high operating temperatures (up to 350°C), what is more, it has a quite low coefficient of thermal expansion (CTE), allowing for additional compatibility options for PCB design.