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Mike Garner

Managing Director at Garner Osborne Circuits Ltd

The 9 stages of printed circuit board production

Printed circuit board production is pretty straightforward for our customers.

From the moment you pick up the phone to us or drop us a message, we’ll walk you through everything we need from you to be able to deliver your printed circuit boards quickly and cost-effectively.

However, in case you ever wondered exactly what happens once you’ve made that initial contact, here’s the printed circuit board manufacturing process from start to finish.

The PCB manufacturing process is a lengthy one, and each element of the process is essential to ensuring your PCB is reliable and robust.

1. Front end engineering
First up, our team of skilled engineers review the Gerber files to check for any potential manufacturing problems , or any ways that we can save you money or improve the effectiveness of your design. Many PCB manufacturers don’t offer this service, but we see it as part of our responsibility as your PCB production partner.

Then, using Genesis software with NC, AOI and test data, we create the tooling and plot files before sending them to the Silver Writer to laser plot the photo tools.

2. Drilling reference and tooling holes
Next up is to drill the reference and tooling holes.
These holes are essential as they help to ensure multiple layers are aligned, with good registrational accuracy.

Our drilling department has 20 drilling spindles and 8 profiling spindles, all operated by Sieb & Meyer software controllers. The drills range from 2 to 6 spindle machines – ample capacity for low, medium and higher volume orders.

3. Preparing for copper plating
The next part of the process takes place in the wet shop where we apply a horizontal direct metallisation line which creates a conductive carbon graphite layer in the holes of the PCB. We use an 8-cell copper plating line with pulse engines, and side-to-side rectification for enhanced accuracy of copper despation

4. Applying a dry film
The dry film is essential to the image transfer process. We have 2 Western Magnum Laminators that apply the dry film, which is then printed with UV exposure from our Cirgraphics vacuum frames, or using our state of the art Limata L.D.I

5. Solder Resist & Ident Applications
Solder Resist & Ident can either be flood coated or spray coated. And as they are direct imaging inks they will then be exposed through the photo-tools using a Colight vaccum frame with white light ensuring registrational accuracy of Solder Mask & Iden to relative pads & tracks.

6. Surfacing and finishing
We have a number of finishes available in printed circuit board production

i. Leaded HASL
ii. Lead Free HASL
iii. Immersion Gold
iv. Immersion Silver
V OSP

Any of the less popular finishes we have sub-contract facilities available.

7. Testing
Next we test each unit using flying probes to ensure all products are free from shorts, opens or any other flaws before being despatched. We also use AOI for inner layers and more complex copper layers to improve yield rates and reduce product waste.

8. Quality control inspections
Because at Garner Osborne we take quality and our printed circuit board production very seriously, each product is inspected prior to leaving our premises.

We use an inspection pack generated at the start of the job to do this. We also have a team of inspectors who carry out intermediate and final checks with the help of a Lynx System that provides up to 80x magnification to help with the file generation and FAIRS.

9. Packaging and despatch
We then wrap each and every product in acid-free tissue and then vacuum pack and bubble wrap them to ensure that your PCBs arrive at their destination in top condition, ready for assembling into your product.

To get a quote from PCB production, click here