Transparent PCB
Engineering Clarity
Into Every Circuit

A transparent PCB is a printed circuit board manufactured on a clear, optically transparent substrate — such as polycarbonate, PET film, or clear glass-epoxy laminate — instead of conventional opaque FR4. The clear base allows light to pass through and makes circuit traces visible from both sides, enabling both aesthetic and functional design advantages in illuminated electronics, optical instruments, and wearable devices.

The main transparent PCB substrate materials are: polycarbonate (PC) for general consumer applications; PET film for flexible boards; clear glass-epoxy (clear FR4) for rigid industrial use; transparent polyimide (PI) for high-temperature flexible boards; acrylic / PMMA for decorative and LED-display applications; and borosilicate glass for precision optical and medical instruments. The appropriate material depends on the thermal, mechanical, optical, and dielectric requirements of your specific design.

Transparent PCBs typically cost 1.5–6× more than equivalent standard FR4 boards, depending on the substrate chosen. Polycarbonate and acrylic boards are at the lower end of this range; borosilicate glass boards at the higher end. Key cost factors include substrate material grade, order quantity, board dimensions, layer count, required optical transmittance specification, and surface finish. Volume orders (500+ units) significantly reduce per-unit cost through improved material yield. Contact PCBSync for a detailed quotation based on your Gerber files.

Yes — with appropriate substrate selection. Standard polycarbonate has a Dk of approximately 2.9–3.0, which is comparable to standard FR4 and suitable for many RF designs up to a few GHz. For higher-frequency applications, transparent low-loss PTFE composites and specialty clear laminates are available with competitive Dk and Df specifications. Always verify the exact dielectric properties with your manufacturer and stack-up simulation before design lock to ensure impedance control targets are achievable.

PCBSync can achieve minimum trace widths of 3/3 mil (75µm) on standard transparent PCB substrates, and 2/2 mil on premium substrates with HDI processing. Minimum via drill sizes start at 0.1mm for laser-drilled microvias. Note that for aesthetics-critical transparent PCBs, trace width also affects visual appearance — wider, more evenly spaced traces often look cleaner when the board is illuminated. Our DFM review will flag both electrical and aesthetic trace-routing considerations.

Yes. PCBSync manufactures transparent PCBs from 1 to 16 layers. Multi-layer transparent PCBs require specialty clear prepreg bonding films that maintain optical clarity through the stack-up. Note that each additional layer reduces overall transmittance due to additional adhesive and copper layers. For applications where maximum transparency is required, consider 1–2 layer designs; where complex routing demands more layers, 4–6 layers with optimised copper pour strategy typically achieves acceptable visual results.

Simply submit your enquiry using the form below, or visit pcbsync.com/transparent-pcb/. Include your Gerber files (or design description at the enquiry stage), board dimensions, layer count, quantity, target substrate material, and any special optical or electrical requirements. Our applications engineers will review your design, provide free DFM feedback, and deliver a detailed quotation within 24 business hours.