| 摘要 |
A multi-layered circuit board device includes an isolative layer and a wiring layer sequentially provided on a circuit board in a PCB, ceramic, LTCC or aluminum nitride build-up process. Thus, the thickness of the multi-layered circuit board device is small and the density of the multi-layered the circuit board device is high. Furthermore, the structure of the multi-layered circuit board device is simple and the cost of the multi-layered circuit board device is low. The layers are connected to one another in the PCB, ceramic, LTCC or aluminum nitride build-up process without having to use additional alignment target points. |
