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By Steve Baker | Aug 9, 2016
Via printing with webline

In a previous blog, we learned that vias are pathways connecting both sides of the polyester substrate creating a two-sided circuit. Today, we will discuss the difference between sheet printing and webline printing through the process of vias printing.

During the sheet printing process, after each sheet has been printed, the press table needs to be hand-wiped to ensure the ink will not smear and ruin the printed circuit. In webline printing, the machine has a wiper mechanism, automating the process. Using webline printing increases production speeds and creates a more streamlined printing process.

Beneath the print bed lies a roll of wiper material. When unrolled, the wiper material moves up to the top of the print bed. The print head puts down the ink and as the substrate advances along, the wiper material moves simultaneously, preventing the ink from smearing. Then printed parts move through a thermal tunnel drier to cure the ink.

GM Nameplate has extensive printing capabilities, including offset, flexo, screen and sheet fed screen printing. We also offer multi-color sheet fed screen printing, roll-to-roll, and digital printing. GMN’s wide range of printing capabilities allows us to find the right printing solution for each application.    

To learn more about vias and their use in two sided circuits, check out this blog post.  

Below are images of the webline press in action.

Wiper material

Substrate

Via printing

By Steve Baker | Jul 4, 2016
Two-sided circuit with vias

When you need to use a complicated printed silver membrane for a product, what can you do? That’s where vias and two sided circuits come in handy. Via in Latin means path, so vias are tiny holes, about eight thousandths of an inch large, forming a pathway. Vias allow electrical connections to flow between two sides of a substrate when ink is forced through the holes, creating a via connection. If you look at a two-sided circuit membrane, the holes will be located at the end of the routes.

Below is an image of the vias under 50x magnification.

vias magnified

Vias are used for two reasons. Sometimes a part has a small footprint and numerous routes and traces. In this case, both sides of the substrate are used to allow for more room. Vias let us to use both sides of the substrate, while maintaining the size of the current part.

Dense Membrane Part

(Example of a very dense membrane)

Another reason for using vias is for design purposes. In the picture shown below, one side of the membrane has ink pads which will be used for administering medicine. The other side will be used to attach a circuit board. For this particular product, GMN used vias out of necessity so that the product would work properly.

Vias for Design

By using via printing technology, GMN can meet the needs and requirements of our customers by providing dependable, high-quality products.