source:Industry News release time:2022-08-10 Article author:yu Popular:pcb
Looking at a complex PCB board, such as a computer's motherboard, one might find several tracks going nowhere and terminating abruptly. However, close inspection with a magnifying glass will reveal more detail at the end of the track. Most likely, you'll see that it ends up with a small board pad, not much larger than the width of the track itself, with one or no hole in its center. This is about the via technology of the circuit board factory.
In fact, the track does not terminate, but continues to travel, albeit on a different layer, hidden beneath the outermost layer of the PCB. The ends of the pads are actually small tubes through insulating material that electrically connect the two parts of the track. In board prototyping terminology, this arrangement that allows the track to continue but on a different layer is called a board via.
Multilayer PCB circuit boards use different types of vias for various purposes. There may be through-hole vias, blind vias and buried vias in the same board. While all vias are constructed the same, their naming depends on the origin and termination layers. For example, vias originating from an outermost layer, passing through a board and terminating in another outermost layer are vias. During its passage through the layers of the board, it may or may not be connected to the intermediate layer, depending on the necessity of the circuit.
Blind vias come from one of the outermost layers, but end in the middle layer and are therefore only visible on the starting layer. It may or may not be connected to other layers in between. A buried via is not visible from either of the outermost layers because it originates in one inner layer and terminates in another inner layer, possibly connecting other layers in between. By design, the vias consist of two external pads and a copper tube that electrically connects them. The two outer pads are on the originating and terminating layers of the PCB, while anti-pads on all intermediate layers allow the copper pipe to be electrically isolated from the circuits on these layers as they pass through.
Although the two external pads and anti-pads are part of the layout pattern etched into the PCB, the electrodeposition process forms the copper tubes that connect the two. While in conventional PCB multilayer circuit boards, vias may be found, these are less likely in high density interconnect or HDI circuit boards.
Read recommendations:
Computer card board (four layers)
Six-layer Immersion Gold Board (BGA)
Six-layer Immersion Gold Board (BGA)
Popular recommended products
Six-layer Immersion Gold Board (BGA)
2021-04-27Display board (six layers)
2021-04-27Laminate copper-based PCB after 4L (sample)
2021-04-27High frequency PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Mobile phone template (six layers)
2021-04-27Silver oil perforated plate (double-sided)
2021-04-27Computer card board (four layers)
2021-04-25High frequency PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-24Network communication board (sixth floor)
2021-04-29Six-layer Immersion Gold Board (BGA)
2021-05-24Six-layer Immersion Gold Board (BGA)
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-05-27High frequency PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Aluminum substrate (double-sided)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27High frequency PCB
2021-04-27Single copper base PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Single-sided double-layer AL base PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-26Six-layer Immersion Gold Board (BGA)
2021-04-26Mobile phone board
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-04-26DIP plugin
2021-05-27Mobile phone board
2021-04-27SMT stickers
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-04-26DIP plugin
2021-05-27SMT stickers
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-04-26Related Information
Composition of PCB
2024-09-29What is the difference between PCB and PCBA
2024-09-10PCB usage tips
2024-08-20Why do the circuit boards are green
2024-08-12How to clean the aluminum substrate?
2024-08-06Maintenance of Chemical Copper Plating Solution on PCB Board
2024-07-22single-sided PCB board and double-sided PCB board
2024-07-15PCB board production process flow
2024-07-09PCB CTI level
2024-07-01Via technology in circuit board factory.Automotive Electronics PCB
2024-06-25The role of FPC flexible circuit board solder mask
2024-06-18Detailed explanation of PCB board sampling production process
2024-06-11pcb v-cut depth standard
2024-05-27Multilayer Printed Circuit Board.What is the eq of PCB
2024-05-20The relationship between PCB safety distance and voltage
2024-04-22SMT surface mount processing.Hybrid circuit board PCB
2024-04-15PCB enterprises should pay attention to SMT matters.Electronic components PCB
2024-04-03PCB - the core building block of electronic products.Automotive Electronics PCB
2024-03-25PCB - the bridge and link of the electronic world
2024-03-18How to define high-frequency and high-precision circuit boards.Industrial Electronics PCB
2024-03-11USB PCB interface layout and wiring requirements
2024-01-22Electrolytic capacitor PCB.Steps for using PCB pins
2024-01-15Automotive ElectronicWhat aspects should be considered when processing and manufacturing PCB boards?
2024-01-08Electrolytic capaciWhat is the difference between a gold-plated circuit board and a gold-plated one?
2023-12-25When grinding PCB boards, attention should be paid to.Oscillator (belonging to crystal) PCB
2023-12-18Industrial Electronics PCB!What precautions should be taken when copying and grinding PCB boards
2023-12-11Do you know who is more suitable for LED direct display, regarding the difference between PCB board
2023-12-05Aluminum electrolytic capacitor PCB.What are the standards for selecting PCB boards
2023-11-27Surface Mount Technology (SMT) Phase PCB
2023-11-20Oscillator (belonging to crystal) PCB.The main functions of PCB board
2023-11-13
CopyRight © 2007-2024
粤ICP备2021061255号
Address:
1205, Floor 12, Building 3, Chuangyi Office Building, No. 110, Ziheng West Road, Jinsha Community, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China
Tel:
+86-755-29662580
Email:
sales@victoriapcb.com
PCB
PCBA
Service
Process
Tel: +86-755-29662580
Email: sales@victoriapcb.com
中
current position:
