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Unlike a Double-Sided PCB which only has two conductive layers of material, all multilayer PCBs must have at least three layers of conductive material which are buried in the center of the material.
How are Multilayer PCBs Made?
Alternating layers of prepeg and core materials are laminated together under high temperature and pressure to produce Multilayer PCBs.
This process ensures that air isn’t trapped between layers, conductors are completely encapsulated by resin, and the adhesive that holds the layers together are properly melted and cured.
Multilayer PCBs Benfits (Compared with Single or Double-Sided PCBs)
Higher assembly density
Smaller size (considerable savings on space)
Increased flexibility
Easier incorporation controlled impedance features.
EMI shielding through careful placement of power and ground layers.
Reduces the need for interconnection wiring harnesses (reduces overall weight)
Multilayer PCBs Applications
While the weight and space benefits of multilayer PCBs are especially valuable for Aerospace PCBs, multilayer PCBs are also beneficial to applications where “cross-talk” levels are critical.
These are a few other applications using multilayer printed circuit boards:
YS Multilayer PCB manufacturing capabilities overview | ||
Feature | capabilities | |
Layer Count | 2-60L | |
Available Multilayer PCB Technology | Through hole with Aspect Ratio 16:1 | |
buried and blind via | ||
Hybrid | High Frequency Material such as RO4350B and FR4 Mix etc. | |
High Speed Material such as M7NE and FR4 Mix etc. | ||
Thickness | 0.3mm-8mm | |
Minimum line Width and Space | 0.05mm/0.05mm(2mil/2mil) | |
BGA PITCH | 0.35mm | |
Min mechanical Drilled Size | 0.15mm(6mil) | |
Aspect Ratio for through hole | 10:1 | |
Surface Finish | HASL, Lead free HASL,ENIG,Immersion Tin, OSP, Immersion Silver, Gold Finger, Electroplating Hard Gold, Selective OSP,ENEPIG.etc. | |
Via Fill Option | The via is plated and filled with either conductive or non-conductive epoxy then capped and plated over(VIPPO) | |
Copper filled, silver filled | ||
Registration | ±4mil | |
Solder Mask | Green, Red, Yellow,White, Black, Purple, Matte Black, Matte green.etc. |
layer/m² | S<1㎡ | S<3㎡ | S<6㎡ | S<10㎡ | S<13㎡ | S<16㎡ | S<20㎡ | S<30㎡ | S<40㎡ | S<50㎡ | S<65㎡ | S<85㎡ | S<100㎡ |
1L | 4wds | 6wds | 7wds | 7wds | 9wds | 9wds | 10wds | 10wds | 10wds | 12wds | 14wds | 15wds | 16wds |
2L | 4wds | 6wds | 9wds | 9wds | 11wds | 12wds | 13wds | 13wds | 15wds | 15wds | 15wds | 15wds | 18wds |
4L | 6wds | 8wds | 12wds | 12wds | 14wds | 14wds | 14wds | 14wds | 15wds | 20wds | 25wds | 25wds | 28wds |
6L | 7wds | 9wds | 13wds | 13wds | 17wds | 18wds | 20wds | 22wds | 24wds | 25wds | 26wds | 28wds | 30wds |
8L | 9wds | 12wds | 15wds | 18wds | 20wds | 20wds | 22wds | 24wds | 26wds | 27wds | 28wds | 30wds | 30wds |
10L | 10wds | 13wds | 17wds | 18wds | 20wds | 20wds | 22wds | 24wds | 26wds | 27wds | 28wds | 30wds | 30wds |
12L | 10wds | 15wds | 17wds | 18wds | 20wds | 20wds | 22wds | 24wds | 26wds | 27wds | 28wds | 30wds | 30wds |
14L | 10wds | 16wds | 17wds | 18wds | 20wds | 20wds | 22wds | 24wds | 26wds | 27wds | 28wds | 30wds | 30wds |
16L | 10wds | 16wds | 17wds | 18wds | 20wds | 20wds | 22wds | 24wds | 26wds | 27wds | 28wds | 30wds | 30wds |
FQA
How you work with YScircuit?
YScircuit has been producing Multilayer PCBs for over 10 years.
Over the years, we have seen all types of multilayer constructions from various industries, answered all types of multilayer questions, and solved all types of problems with multilayer PCBs.