Why pcb are green

Remember Me. Lost Password Lost your password? Send Message. Register Now top10pcb. Create an account. Ask Question Add post User Profile. Table of Contents. About Miki. Comments 5. Log in to Reply. Leave a reply. Click here to cancel reply. Previous post Next post. Link Text. Open link in a new tab. This trend of green color, due to it being so common, became cost-effective too. That is why some experts say that the Glass Epoxy is one of the reasons why the circuit boards are always green in color.

The Contrast of Green Color with the White printed text:. Assemblers often find it easy and less time-consuming in scanning the green circuit boards because they are already habitual and pretty familiar with this color. They say that takes a lot of time to scan circuit boards of some different color. Another reason is that the green color creates less strain on the eyes while scanning as compared to other colors.

The green color is used because it also contrasts the text printed in white on the routing of the circuit board. That is why the line workers prefer using green color while scanning the circuit board.

The Color Green used for Military Purpose:. Some researches were based on this that how military standards were a great influence in the green color of the circuit boards. This all started in the USA that the military of the USA considered this green color to be highly effective in the circuit boards that were also used for military purposes. The military demanded the green circuit boards from the suppliers who also supplied to other customers. These circuit boards were becoming a surplus for the suppliers from the military eventually.

So not only the assemblers, line workers, or other clients consider the green color, the military forces also accept the green color of the circuit boards. The Rate of Exposure with the Solder Mask:. A higher solder rate is required for the circuit boards.

There are other colors too but they do not provide a higher solder mask for the circuit board. Those colors which have dark shades like blue, white, or brown have high pigmentation and therefore they have dark-colored solder masks. Mostly the white and black solder masks are high in exposure rate. But the green color provides a dark shade for the exposure rate to the workers and high tolerance in the design. Some Other Colors of the Circuit Boards:.

Circuit boards come in different colors and have different colors of solder masks as well. The colors mostly differentiate between multiple popular brands and companies that produce and manufacture them. The colors are decided during the production process, once it is observed that the colors meet all the criteria, and are acceptable by the assemblers. Many manufacturers and assemblers also use other dark colors as an alternative to green colored solder masks.

Some alternative colors that are considered are as follows:. The white-colored solder masks are also created by some companies due to the shade and appearance. They are used especially for models to be shown. Now the question arises that how can the print of the white text be visible. As a side note, our company like so many others always ordered green solder-mask on PCBs.

When the RoHS directive came along, we began ordering our boards for our RoHS compliant products in blue so that they could be easily identified. It's a little ironic that the "lead-free" boards are the ones that are not "green" :. Sign up to join this community. The best answers are voted up and rise to the top.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Why are circuitboards traditionally green? Ask Question. Asked 8 years, 1 month ago. Active 8 years, 1 month ago. Viewed 33k times. TheLoneKing 2 2 gold badges 8 8 silver badges 22 22 bronze badges.

Connor Wolf Connor Wolf Maybe that has something to do with it? Therefore my vote at this moment goes to impurities in the glass. Scrape it off or look at the cut-off edge of the board and it's a brownish white. Show 1 more comment. Active Oldest Votes. Possible explanations: The US military required PCBs to be green When mixing the base resin and the hardener together, they turn green It is an ergonomic choice due to the human eyes ability to detect green, and the contrast of green with white text Some combination of the above Source: Thefreelibrary Source: Quora Digging deeper Add a comment.

The most popular resin and hardener at the time came out that colour and the laminates at the time were green as well making it easy to accept. Green has the highest human eye response so gives the best contrast.