Light-blocking black printed circuit board material CS-3667B
To prevent sensor malfunctions.
It is a black printed circuit board material that does not transmit or reflect light, even with a thickness of only 0.1mm. It absorbs not only visible light but also light from sensors, commonly used in the red to near-infrared range (wavelengths of 650 to 1310 nanometers). The glass transition temperature is 250°C, with a UL flammability rating equivalent to 94/V-0, and the coefficient of thermal expansion below the glass transition temperature is 34ppm/°C, making it a high-performance printed circuit board material.
basic information
The optical sensor is designed with a light-emitting component (LED) and a light-receiving component (phototransistor) mounted very closely on a substrate that is only a few millimeters square. If these components are not optically separated, it can lead to sensor malfunctions or sensitivity issues. The CS-3667B is a printed circuit board material that does not transmit or reflect light, even at a thickness of just 0.1mm. The photo shows a sample of 0.1mm thickness placed in front of a four-light LED module with a luminous flux of 100 lumens. It can be seen that the CS-3667B on the left does not allow light to pass through. The CS-3667 is flame-retardant. It is a high-heat-resistant plastic reinforced with glass cloth, so we expect it to be useful in fields where materials that do not transmit light are needed, such as interior materials and displays, even when thin.
Price range
Delivery Time
Model number/Brand name
Rishoraito CS-3667B
Applications/Examples of results
Optical sensor substrate, chip LED mounted substrate
Detailed information
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Image of a proximity sensor A light-emitting semiconductor and a light-receiving semiconductor are mounted very close to each other on a substrate measuring a few millimeters on each side.
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An image of malfunction may occur. When materials around the components scatter or transmit infrared rays, malfunctions or a decrease in sensitivity may occur.
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The light reflectance of the copper foil removal surface shows that it hardly reflects light commonly used as a light source for sensors.
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The light transmittance of the copper foil removal surface shows that it hardly transmits light commonly used as a light source for sensors.
Line up（1）
| Model number | overview |
|---|---|
| CS-3667B |
