White printed circuit board material for LED mounting
A quarter of a century since the release, thank you for your continued support.
This is an FR-4 type printed circuit board material with a white appearance designed to accommodate LED elements and LED components.
basic information
This is a type of printed circuit board material known as FR-4 in the industry, made of glass epoxy. Therefore, it can be processed using existing machinery and know-how. We offer a standard type that keeps costs down, a high-grade type with excellent discoloration resistance, a best-seller with superior thermal conductivity, and a composite type with aluminum plates, among others, providing a lineup tailored to various costs and applications.
Price range
Delivery Time
Model number/Brand name
Rishoraito
Applications/Examples of results
Mounting of LED elements. Mounting of LED components. Dissipation of heat emitted by LEDs (supporting the design of heat dissipation pathways).
Line up（4）
| Model number | overview |
|---|---|
| CS-3965C | A standard type with excellent cost performance. It has received a lot of support over the years. It has a high initial whiteness and efficiently reflects the light emitted by LED elements. The glass transition temperature is 160°C. The thermal conductivity (JIS R1611) is about twice that of typical glass cloth-based epoxy resin printed wiring board materials (FR-4), at 0.7W/mK. |
| CS-3965V | A high-grade type that is less likely to have a decrease in whiteness even when exposed to heat and ultraviolet (UV) emitted by LEDs. The glass transition temperature is 210°C. The thermal conductivity (JIS R1611) is about 0.6W/mK, which is approximately twice that of general FR-4. LED lighting is known for its long lifespan, but in addition to the so-called "burnout," it reaches the end of its lifespan when brightness decreases to 70% of the initial level. If the surface of the substrate discolors due to heat or UV, brightness will decrease. It contributes to extending the "healthy lifespan" of LEDs. |
| CS-3945 | A bestseller with a thermal conductivity of 1.3W/mK (JIS R1611), which is four times that of general FR-4. High thermal conductivity materials of glass epoxy type are mainly CEM-3 types, which consist of glass non-woven fabric sandwiched between glass cloth, and naturally have a thickness of about 1mm. In contrast, CS-3945 uses only glass cloth. This allows it to be made into a thin 0.1mm material, achieving "reduced thermal resistance." In other words, it has good "heat dissipation." Furthermore, it excels in heat discoloration resistance, and its UL flame retardancy is rated 94V-0. |
| AC-7900 | The only aluminum plate-based material in the lineup. The insulation layer of AC-7900 is reinforced with glass cloth, providing an insulation withstand voltage of 4000 volts even at a thickness of just 0.06mm. It also has heat discoloration resistance equivalent to that of CS-3945. The glass transition temperature is 160°C. The thermal conductivity (JIS R1611) is about 1W/mK, which is slightly more than twice that of FR-4, but by being thin, it efficiently dissipates heat to the aluminum plate, supporting heat dissipation design. Its UL flame retardancy is rated 94V-0. |
