PCB Technical - About Color tips for fpc circuit board production

Green has little irritation to the eyes, it is not easy to be tired when staring at the fpc circuit board for a long time,and it is less harmful to the eyes

In fact,fans who have been learning circuits may have such questions,that is why most of the circuit boards we use are green?In fact,the production of fpc circuit boards is not necessarily green. It depends on the designer. What color is it? What color is it. Under normal circumstances, we choose green. Because green is less irritating to the eyes, it is not easy for the production and maintenance personnel to stare at the production of fpc circuit boards for a long time.All colors are painted on the surface after it is manufactured.

Fpc circuit board production color common sense!

1.The reason for using green in fpc circuit board production?

(1) Introduction of domestic professional fpc circuit board production company: Green ink is widely used so far, has a long history, and is cheaper in the current market, so green ink is used by a large number of manufacturers as their own products The main color.

(2) Under normal circumstances, in the process of fpc circuit board production, there are several processes that need to go through the yellow light room, because the effect of green in the yellow light room is better than other colors, but this is not the more important reason. When soldering components in SMT, the production of fpc circuit boards has to go through the process of solder paste and post film and later AOI calibration light. These processes all need to be optically positioned and calibrated. The green background color can identify the instrument. The effect is better.

2.What are the common colors in the production of fpc circuit boards?

(1) The common production fpc circuit board colors are red, yellow, green, blue and black. However, due to problems such as the production process, the quality inspection process of many lines still needs to rely on the naked eye observation and recognition of the workers (currently, most of the flying probe testing technology is used). In the case of bright light, the eyes keep staring at the board. This process is very tiring. Relatively speaking, the green color does not hurt the eyes. Therefore, most manufacturers in the market currently use green PCBs.

(2) Introduction of domestic well-known fpc circuit board manufacturers: The principle of blue and black is that they are doped with cobalt and carbon lamp elements, respectively, and have certain electrical conductivity. Short circuit problems are likely to occur when power is on, and green The production of fpc circuit boards is relatively environmentally friendly, and generally does not release toxic gases when used in a high-temperature environment.

The cost of FPC boards of different colors varies somewhat.

Raw Material Purchase Costs

Lower cost of green ink: Green ink is the most widely used and has a relatively low procurement cost due to its large production scale. Manufacturers usually give preference to green because of the high demand for this color,which directly affects its market price.

Other colors cost more: Black,red,and blue inks are more expensive to purchase due to lower market demand, complex production processes, and scarce raw materials.

Production efficiency and process

Complexity of the production process:various colors of inks in the production process of different process requirements, especially in the color change when the need to clean and adjust the equipment, which to some extent also increases the cost of production.

Impact of factory standardization:The use of a single color (e.g. green) production process can reduce intermediate links, effectively reducing production costs. Multi-color production, on the other hand, tends to lead to higher defect rates, which increases overall manufacturing costs.

Failure Rate and Rework Costs

Quality problems caused by color difference: In the production of black FPC boards, the color difference problem is the most obvious, if the raw materials and process control is not appropriate,it will lead to increased defective rate, which in turn increases production costs. Green circuit boards are less prone to color differences due to mature processes and stable materials,thus reducing rework rates and additional costs.

The impact of pcb board color on specific application scenarios:

1.Consumer electronics

Black and dark FPC boards:often used in high-end electronic devices, such as smart phones and high-end audio equipment, because it gives people a sophisticated, high-tech feeling.

Bright-colored FPC boards, such as red or blue, are often used in low-end products because of their lower cost and simple production process.

Impact on the product: The color choice can affect the overall appearance of the product, which in turn affects the consumer's purchasing decision.

2.Wearable Devices

Color and Visual Aesthetics:Black and silver FPC boards are often considered high-end products, while green FPCs are often the standard color choice.

Utility & Reliability:Certain colors (e.g., black) can help to better conceal circuitry and components, thereby improving the aesthetics and user experience of the device, while also affecting solder quality and legibility.

3.Medical Devices

Thermal Stability:Different colors of FPC may have an effect on the thermal stability of the material, black FPC may be more advantageous in certain high temperature conditions.

Recognition:In medical devices, the ease of color recognition is critical for operation and maintenance. Bright colors such as yellow or white are often chosen to facilitate better inspection and maintenance by staff.

4.Automotive Electronics

Screen Display and Lighting Control:Instrument panel displays in automobiles often use black or dark FPC boards to enhance the display effect, while interior lighting may use a variety of colors to enhance the aesthetics of the interior.

Weatherability:Different colors of FPC may differ in weatherability, and the stability of automotive electronic components under different light and temperature conditions is also a key consideration in color selection.

5.Industrial equipment

Easy to identify: Bright color FPC boards, such as yellow or red, can improve visibility, easy for operators in complex environments and rapid identification.

Production efficiency:the choice of standard colors (such as green) can effectively reduce production costs and improve manufacturing efficiency.

The color of FPC boards is not only an aesthetic factor, but also affects its performance and production costs to a certain extent. In the design and manufacturing process, comprehensive consideration should be given in order to select the color that best suits the needs of a particular product.