Model：JS6R-01161A0
Application：Military Industry
Layer: 6 layer
Finish: ENIG
Solder Mask: Green
Difficulties: Via in Pad, Single End Impedance, Differential Impedance：50±1010%
6-layer board and 4-layer board (6 layers VS 4 layers): refers to the printed circuit board PCB Printed Circuit Board is made of 6-layer or 4-layer glass fiber, usually SDRAM will use a 6-layer board, although it will increase the PCB The cost can avoid the interference of noise, and the 4-layer board can reduce the cost of the PCB but the performance is poor.
The top signal 1 / ground layer / signal 2 // signal 3 / power layer / bottom signal 4 is a streamlined structure of a 6-layer board. In higher-speed circuits, the signal 3 layered structure will be cancelled and become the top signal 1 / ground layer / signal 2 // power layer / ground layer / bottom signal 3 when using "top signal 1 / ground layer / signal 2 // signal 3 / power For layer/bottom signal 4, the traces of signal 2 and signal 3 should be as vertical as possible.
