PCB ARTWORK FILM
PCB Film
High-performance PCB Film relies on mature silver halide emulsion technology to complete accurate circuit pattern transfer during printed circuit board production. It satisfies strict precision standards of electronic manufacturing workshops, and acts as an essential intermediate consumable for creating fine conductive lines on PCB substrates.
Core Functional Advantages of This PCB Film
| Feature Item | Detailed Performance |
|---|---|
| Base Substrate | Polyester sheet with superior dimensional stability, no deformation during high-temperature processing |
| Surface Emulsion Quality | Smooth uniform coating, few particle impurities to avoid pinhole defects on circuit patterns |
| Imaging Index | High contrast, high resolution, high max density and ultra-low base fog |
| Line Reproduction Ability | Sharp clear edge for ultra-fine circuit lines, supports precision miniaturized PCB production |
| Processing Compatibility | Anti-static & dust-proof layer, fits continuous high-temperature rapid processing lines |
| Operation Environment | Must be loaded and sorted under full dark or special safelight to prevent premature fogging |
Standard Sizes & Packaging Specifications
A full range of mainstream inch dimensions covers most daily PCB workshop production demands:
- 24×28in (50 sheets per box)
- 24×30in (50 sheets per box)
- 24×26in (50 sheets per box)
- 16×20in (50 sheets per box)
- 12×18in (50 sheets per box)
- 26×26in (50 sheets per box)
- 20×26in (50 sheets per box)
- 22×26in (50 sheets per box)
- 22×28in (50 sheets per box)
- 20×24in (50 sheets per box)
All products adopt loose-leaf box packaging for convenient single-sheet extraction and neat inventory storage.
Storage & Shelf Life Rules
Sealed unopened boxes need cool dry storage space. Keep ambient temperature below 20°C and relative humidity under 65%RH to slow emulsion aging and maintain stable imaging performance.
The product carries a 18-month shelf life under standard storage conditions.
Complete Operation Guidance For Production Lines
Exposure Calibration
Ideal exposure value changes based on photoplotter hardware and subsequent developing parameters. Operators need to carry out small batch test exposure before mass production to lock optimal parameters. Developing temperature and duration directly affect circuit line sharpness, so coordinate exposure adjustments with chemical processing settings.
Standard Developing Parameters
Match general dedicated PCB developing chemicals on the market for stable output. For 633nm laser exposure workflow, control developer temperature at 32–35°C with 30 seconds developing time. Film drying temperature should stay between 40–50°C.
Overheating above 50°C will raise base fog level and trigger minor substrate dimensional shift, damaging circuit pattern precision.
Darkroom Handling Requirements
Film unpacking and sorting must be finished in total darkness or under dark green safelight. Place the light source at least 1.5 meters away from film stacks and avoid long-time direct illumination on emulsion side.
Do not fold, scratch or touch the film surface with bare hands. Finger grease and surface friction will form permanent marks that interfere with circuit transfer.
Post-Processing Rinsing Standards
Circulating clean water is required for full rinsing after fixing. Complete water washing prevents the film from turning yellow during long-term file storage. Avoid tap water containing excessive bleaching ingredients, which will cause uniform yellow background fog on negatives.
Frequently Asked Questions
Q1: Why does this PCB Film need strict temperature control during drying after development?
A: High temperature over 50°C deforms the polyester base and increases base fog, blurring fine circuit lines and reducing dimensional accuracy for PCB pattern transfer.
Q2: Can ordinary red darkroom safelight be used for this PCB photographic film?
A: Only dark green safelight with specific wavelength is allowed. Red light will cause gradual light fog and damage the latent circuit image on unprocessed film.
Q3: How to avoid yellowing when storing processed PCB negatives for a long time?
A: Use circulating purified water for full rinsing after development and fixing, and store dried films in low-humidity cool space without corrosive gas.
