Overview
The Kepro KC1-66G photosensitized laminate is a production-ready FR-4 copper-clad PCB blank pre-coated with photosensitive dry-film resist. Manufactured by Kepro Circuit Systems, this 6″×6″×0.062″ board combines copper cladding with integrated photoresist, eliminating the need for manual resist coating before image transfer. It is sealed in black plastic to preserve photosensitivity until use, making it suitable for breadboarding, prototyping, and small-batch PCB fabrication.
Key Features
- Pre-coated dry-film photoresist — ready for direct photo-printing, no liquid resist application needed
- 1 oz copper density on a single side for single-layer designs
- FR-4 substrate provides thermal stability and electrical insulation
- 6″×6″ size suitable for mixed-signal prototypes, signal conditioning, and hobby electronics
- Black-plastic sealed packaging preserves photosensitivity during storage
- Rapid iteration — image, develop, and etch in a single workflow
Technical Specifications
- Substrate Material: FR-4 (fiberglass-reinforced epoxy)
- Copper Weight: 1 oz/ft²
- Configuration: Single-sided (copper on one face only)
- Dimensions: 6″ × 6″ × 0.062″ (152.4 mm × 152.4 mm × 1.57 mm)
- Resist Type: Dry-film photoresist (pre-applied)
- Packaging: Black plastic envelope (light-sealed)
- Surface Treatment: Photosensitized
- Dielectric Constant (typical): 4.0–4.5 @ 1 MHz
Typical Applications
- PCB prototyping and breadboarding for educational and professional electronics projects
- Signal conditioning and sensor interface circuits
- Small-batch custom PCB fabrication and design verification
- Amateur radio and hobby electronics
- Low-to-medium speed digital and analog circuits
- One-off and 5–10 piece prototype runs where full commercial fab is uneconomical
Compatibility & Replacements
Compatible With
- Photo-exposure equipment (UV light sources, transparency masks)
- Standard PCB etchants (ferric chloride, ammonium persulfate)
- Dry-film photoresist developers (sodium carbonate, dedicated developer solutions)
- Drill presses and rotary tools for via and component hole creation
- Hand-soldering and wave-soldering processes (post-fabrication assembly)
Replaces / Drop-In Replacement For
- Kepro S1-66G (alternate designation for same product)
- Comparable single-sided 6×6 FR-4 photosensitized laminates from legacy PCB blank suppliers
Works With
- Standard photo-etching workflows (mask printing, UV exposure, chemical development)
- Industry-standard PCB design software (KiCad, Eagle, Altium) — design files can be printed to transparency film for exposure
- Common etch and solder masking chemicals compatible with FR-4 substrates
