Rigid PCBs:Types of through-hole plugs

Rigid PCB Soldermask Ink, according to the curing method, soldermask ink has photopolymerization type ink, heat curing thermosetting ink, and UV light curing UV ink. There is also UV light-curing UV inks. According to the board classification, there are PCB hard board solder ink, FPC soft board solder resist ink, and aluminum substrate solder resist ink, aluminum substrate ink can also be used on ceramic board. aluminum substrate ink, aluminum substrate ink can also be used on the ceramic board above.

Rigid PCB vias are used to establish electrical connections between layers, alignments, pads, etc. of a multilayer PCB. If a multilayer PCB is connected with vias, the size of the PCB can be reduced and the layers can be stacked on top of each other. The size of the PCB can be reduced and the layers can be stacked. Vias are constructed by placing copper soldering trays on each layer of the PCB and drilling a hole through them. There are three general categories of vias: blind, buried, and through holes. “Blind vias are located on the top and bottom surfaces of the printed circuit board and are of a certain depth. For the surface layer of the line and the inner layer of the line connection. “Buried vias are connection holes in the inner layers of the board that are not visible from the board surface. “Through-holes” are holes that run through the entire board and lead from the top layer to the bottom layer. board, from the top layer to the inner layer and then to the bottom layer.

PCB Vias consist of 3 parts
Barrel – the conductive tube used to fill the vias.
Solder Pad – connects all ends of the barrel to its alignment.
Antipad – this is a clearance hole that separates the non-connecting layers from the barrel.

Through-holes in the PCB solder mask treatment process, the common through-hole processes are: through-hole cover oil, through-hole plugging oil, through-hole windowing, resin plugging holes, and copper slurry filling holes The five processes have their characteristics, each with its role and corresponding application scenarios.

Through-hole cover oil refers to over-hole pads covered with ink, no tin above the pad, most circuit boards use this process. The hole diameter of the over-hole cover oil design is not recommended to be larger than 0.5mm. Recommended greater than 0.5mm, the aperture is too large a hole in the set of ink has certain quality risks.

Through-hole window refers to the through-hole pads that do not cover the oil-exposed copper, surface treatment is immersion gold or spray tin. The role of the open window is in the components over the wave soldering. Spraying tin on the inner wall of the hole will increase the hole’s ability to conduct current. . rigid pcb

Through-hole oil plugging refers to the through-hole hole walls stuffed with ink, the production of the first aluminum sheet will be soldered resist ink into the through-hole inside, and then the whole board printed solder resist oil. Vias The purpose of plugging the oil is to prevent the PCB over the wave soldering tin from the through-hole through the component surface resulting in a short circuit.

Resin hole plugging refers to the hole wall of the hole stuffed with resin, and then plated flat pads, applicable to any type of one side of the window of the hole or both sides of the window of the hole in the disk. The hole in the disk. The purpose of resin plugging holes in the process point of view, such as blind embedded holes are drilled before pressing, if the holes do not take the resin plugging will lead to the Pressing of the PP adhesive into the hole, resulting in a lack of laminating glue burst plate. From the design point of view, the pad is drilled above the hole, if not resin plug hole plating filler If not resin plugging holes plating filler, the welding area will lead to poor welding.

Copper paste hole filling refers to the hole wall inside the hole plugged with copper paste, and then plated pads, applicable to any type of side of the window of the hole or two-sided window of the Hole-in-pad. The purpose of copper paste hole plugging is to apply a high current to the hole-in-pan, and the cost of copper paste hole plugging is much higher than the cost of resin hole plugging.

Regardless of the type of hole plugging chosen by the customer, opcba can meet your requirements. Vias play a very important role in Rigid pcb, taking the role of They play a very important role in Rigid pcb’s by providing the electrical function of connecting the layers as well as the fixing and positioning of the devices. rigid pcb

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