Layer PCB

ZF Electronics, as one of the top custom circuit board manufacturers and pcb
manufacturing companies in China, can provide customers with single-sided PCB,
double-sided FR4 PCB, metal core PCB, heavy copper PCB, rigid PCB and rigid-
flex PCB.

4 layer pcb board is laminated on the basis of double-sided PCB, PP and copper
foil are added on both sides of the double-sided PCB. Usually, the layout of
the4 layer PCB is signal wire-ground wire-power supply-signal.

Production of 4 layer PCB
4 layer PCB/four layer pcb is made by lamination on the basis of the double
sided PCB. During the lamination, copper foil and PP are added to the two sides
of the double-sided PCB, and then the cheap 4 layer pcb is formed by high-
temperature pressing. Some people would ask: what is the difference between
double sided PCB and four layer PCB? The cropped double sided PCB can be
drilled directly on the machine without lamination, while the 4 layer PCB will
enter the lamination process after some circuits are etched in the inner layer.
Finally, drill holes can be made after lamination.

What are the common rules for designing a 4 layer PCB?
(1) Line width:
Usually, the signal line is set up 6mil, and the remaining power lines are 5V
and 3.3V or it can be set up 10mil, 20mil respectively.
(2) Vias:
Normally, there are about 2-3 types of vias on a 4 layer flex pcb product. The
designed conductor width and conductor spacing should take the production
process capability of the 4 layer pcb manufacturer into consideration. If the
conductor width and conductor spacing we designed are over the production
capacity of the partner, it may increase unnecessary production costs, and even
need to change the supplier. Therefore, when designing the conductor width and
conductor spacing, we should basically control it at 4/4mil and the via 12mil,
then the PCB 4 layer board supplier above 85% are able to put them into
production. The conductor width and conductor spacing here refer to the size
between elements such as line-to-hole, line-to-line, line-to-pad, line-to-via
when setting rules.

The setting rules consider the design bottleneck in the design file. If there
is a 1mm BGA chip, its pin depth is relatively shallow, and only one signal
line is needed to be set between two rows of pins and it can be set to 6/6mil.
If pin depth is relatively deep, two signal lines need to be taken between the
two rows of pins and it can set to 4/4mil. If there is a 0.65mm BGA chip, it
needs to be changed to HDI blind via design. Generally speaking, if it is
larger than the design bottleneck, then the regional rules can be set. Local
line width and moment are designed to be smaller and the other places on the
board could be larger to facilitate production and improve the qualification
rate.

(3) Copper foil:
Under normal circumstances, modifications can be made.
If you have questions about our 4-layer PCB production capacity, or the
specifications required for your custom project are not listed on this page,
please feel free to contact us. We will reply within one workday. We will
continue to provide quotation support and design support. Welcome to learn
about our production process.

If you want to know 4 layer pcb price/4 layer pcb cost, please contact us.F

Minimum Order: 1 dozens

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