Process, Capacity, Selection & 200+ Models from a 20-Year Manufacturer
A PCB etching machine is a chemical processing system that uses acidic or alkaline solutions to selectively remove unwanted copper from a printed circuit board, leaving only the conductive traces that form the electrical circuit. It is the core equipment in PCB inner-layer and outer-layer pattern transfer, and is essential for producing HDI boards, flexible PCBs, and rigid multilayer PCBs used in consumer electronics, automotive electronics, 5G communications, and aerospace applications.
Beijing Zhengsheng Hongcheng (BJ ZSHC) has manufactured PCB etching equipment for 20 years, offering 200+ models covering horizontal spray etching lines, acidic/alkaline etching lines, DES (Develop-Etch-Strip) three-stage lines, FPC roll-to-roll etching systems, and PCB prototyping systems. Products are exported to 30+ countries, serving 5,000+ customers globally.
The PCB etching process consists of 4 steps:
Acidic etching chemistry:
Cu + CuCl₂ → 2CuCl 2CuCl + 2HCl + H₂O₂ → 2CuCl₂ + 2H₂O
Oxidant (H₂O₂ or NaClO₃) continuously regenerates CuCl₂ to maintain etchant activity.
| Comparison | Acidic (CuCl₂) | Alkaline (Cu(NH₃)₄) |
|---|---|---|
| Etch Rate | 35-50 μm/min | 25-40 μm/min |
| Undercut | Small (fine line advantage) | Larger |
| Min Line/Space | 3mil/3mil (75μm) | 5mil/5mil (125μm) |
| Resist Compatibility | Dry film/Oil/Tin | Dry film/Oil/Tin/Gold |
| Cu Recovery | Electrowinning ≥95% | Precipitation (requires breaking complexes) |
| Typical Use | Inner layer, HDI, fine line | Outer layer, large panel |
Selection recommendation: Most PCB manufacturers use the inner-acid + outer-alkaline combination. Use acidic-only for HDI fine line focus; use alkaline-only for large-panel mass production focus.
Horizontal spray etching machines (conveyor-belt type) feature high capacity, high automation, ideal for mass production. They are the standard choice for most PCB manufacturers.
Vertical etching machines (basket/swing type) are suitable for small batches, multi-variety, R&D prototyping. Lower equipment cost but lower capacity.
Recommendation: Choose horizontal for monthly production over 10,000 m²; choose vertical for prototyping.
This is the most critical planning metric for PCB manufacturers and equipment managers. Use this 6-step formula for precise capacity calculation:
Formula: Monthly capacity target = Monthly order volume × 1.3 safety factor
Why 1.3? Order fluctuation ±20% + equipment maintenance 5-10% + sudden failure 5% = 30% cumulative safety factor.
Formula: Hourly capacity = Monthly target ÷ (daily working hours 20 × monthly working days 25 × overall efficiency 0.85)
Example: 10,400 m²/month ÷ 425 = ~24.5 m²/hour
Choose effective width based on your maximum PCB panel size:
Choose conveyor speed based on board thickness and etchant type:
| Board Thickness | Acidic Etching | Alkaline Etching |
|---|---|---|
| 0.1-0.5mm thin board | 2.0-3.0 m/min | 1.5-2.5 m/min |
| 0.5-2.0mm regular | 1.2-1.8 m/min | 1.0-1.5 m/min |
| 2.0-6.0mm thick board | 0.5-1.0 m/min | 0.5-0.8 m/min |
Number of lines = Hourly capacity ÷ Single line capacity. Round up + 1 backup.
Configure配套 equipment synchronized with etching line: grinding machine, developing line, stripping line, washing line, drying oven.
Need: 8,000 m²/month orders, single/double-sided, 1.6mm board, 610×610mm panel
Calculation:
Investment: 35,000-60,000 USD
Need: 40,000 m²/month orders, 4-6 layer PCB, 1.0-1.6mm board, inner/outer layer separate etching
Recommendation: 2 × BJ ZSHC GE-H800 horizontal etching lines (inner acid + outer alkaline), each 82 m²/hour
Real capacity: 69,700 m²/month (34% margin)
Investment: 80,000-150,000 USD (including DES three-stage line)
Recommendation: 3 × BJ ZSHC GE-H1000 horizontal etching lines + 1 × DES three-stage line
Real capacity: 127,500 m²/month (23% margin)
Investment: 300,000-500,000 USD
Need: 500 m²/month, sample-focused, multi-variety small batches
Recommendation: Small precision etching machine + laboratory developing/stripping line
Investment: 8,000-25,000 USD + 15,000-30,000 USD
Need: 5,000 m²/month large stainless steel decorative panels (elevator doors, curtain walls)
Recommendation: BJ ZSHC GE-SST-L large-format decorative etching machine (2500mm width)
Investment: 35,000-80,000 USD
Improving overall efficiency from 0.70 to 0.90 yields ~30% capacity increase.
A PCB etching machine uses chemical corrosion to selectively remove unwanted copper from a PCB substrate. The process involves dry film lamination, UV exposure, development, spray etching, and resist stripping. BJ ZSHC machines achieve ±0.05mm line width precision.
Acidic (CuCl₂) faster (35-50 μm/min), smaller undercut, ideal for fine lines (3mil/3mil). Alkaline (ammoniacal) compatible with tin/gold plating, lower copper recovery cost, ideal for outer-layer patterns.
Formula: Effective Width (mm) × Conveyor Speed (m/min) × 60 ÷ 1000 × Thickness Factor × Daily Hours × Monthly Days × Overall Efficiency (0.85).
BJ ZSHC: Small lab machines 8,000-25,000 USD; PCB horizontal lines 35,000-180,000 USD; DES three-stage line 80,000-300,000 USD; FPC roll-to-roll 150,000-400,000 USD.
Standard models 15-25 working days; custom 30-45 working days. Sea shipping 25-35 days, air 7-10 days.
Yes. Customization options: panel size up to 2500mm, etchant type (acidic/alkaline/ferric chloride), conveyor mode (horizontal/vertical/roll-to-roll), capacity, automation level.
Inner layers & fine lines: acidic cupric chloride (CuCl₂) at 38-42°Bé, 45-50°C. Outer layers with tin plating: alkaline ammoniacal at pH 8-9, 50-55°C.
Send us your requirements — get proposal + quote within 1-2 business days.
Sales: Liu Manager +86-150-1060-8128 | +86-010-6756 6879
Email: etchmachinery@163.com
Address: B-701 Green Wealth Center, Daxing District, Beijing, China
Website: www.etchmachinery.com (English) | www.ggpx.cn (Chinese)
20 years etching equipment expertise | 200+ models | 30+ countries | ISO 9001 certified
Send us your requirements — 1-2 day turnaround on proposal + quote