Contact Us
Blind Via PCB
Blind Via PCB

Blind Via PCB

As the name suggests, blind via cannot be seen. Blind via is the via that connects the surface layer and the inner layer without penetrating the entire board. In order to increase the space utilization of the PCB circuit layer, the blind via is produced. Blind via is located on the top and bottom surfaces of the printed circuit board and has a certain depth. It is used to connect the surface circuit and the underlying inner circuit and the depth of the hole usually does not exceed a certain ratio (aperture).

Blog
  • Why is the Color of PCB Mostly Green?

    The color of PCB surface is actually the color of solder resist, which can prevent the wrong soldering of components, prolong the service life of devices, and prevent the oxidation and corrosion of de...

    Read More >
Contact Us

How to manufacture blind via PCB?


The blind via production method requires special attention to the depth of the drilling (Z-axis) to be just right. If you do not pay attention to it, it will cause difficulties in electroplating in the via, so almost no factory adopts it. You can also put the circuit layer that needs to be connected in advance in the individual circuit layer. The vias are drilled first, and then glued together, but more precise positioning and alignment devices are required.


The line width and line spacing of most process equipment: blind via 0.1mm, 0.125mm, 0.15mm.


Difference between blind via and plating through hole PCB


From the processing point of view, plating through hole PCB and blind via PCB have different requirements for cutting tools in terms of chip removal ability. The processing of blind vias makes it easy for the cutting tool to be buried in iron chips, so better chip removal performance is required.


It is better to use spiral flute taps to machine blind holes, instead of straight flutes, it is easy to block chips and cause tool breakage.


For drilling and blind hole processing, it is best to use an internally cooled central water outlet drill bit. With the central water outlet effect of the machine tool, the iron filings can be forced off by the coolant pressure, so that the iron filings will not be entangled and blocked, which leads to over-tolerance in machining and breakage of tools.


The boring is the same as the drilling, and it is best to use the center outlet.


But the above statement is not absolute. It mainly depends on the depth-to-diameter ratio of the blind via. If the shallow hole is processed, it can also be used as a general plating through hole PCB processing tool.


If you have questions about our blind via 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.

Leave a Message
PCB Market
  • Single Side PCB/Single-Sided PCB
    Jan 11.2021
    Single Side PCB/Single-Sided PCB
    Single-sided PCB is a kind of printed circuit board. Only one side of this PCB board has circuits (either with holes or without holes), and the other side is covered by substrate or directly covered b...
  • Rigid PCB
    Jan 12.2021
    Rigid PCB
    PCB can be divided into rigid PCB and flexible PCB according to the production materials. The rigid PCB has phenolic paper laminate, epoxy paper laminate, polyester glass felt laminate and epoxy glass...
Contact Us
Phone: +86-188 7956 1688
Address: No.52, Jianshi Industrial Park, Xinqiao Street, Baoan District, Shenzhen, China
No.52, Jianshi Industrial Park, Xinqiao Street, Baoan District, Shenzhen, China
service@zfpcba.com
+86-188 7956 1688