Heavy copper pcb assembly

We provide heavy copper pcb one-stop processing and manufacturing services, LST Technology is a trusted partner.

Heavy copper pcb

Number of manufacturing layers: 1-48 layers

Number of SMT lines: 8 high-speed SMT mating lines

SMT daily production capacity: more than 50 million points

Inspection equipment: X-RAY tester, first piece tester, AOI automatic optical tester, ICT tester, BGA rework station

Mounting speed: CHIP component mounting speed (optimal conditions) 0.036S/chip

Minimum package: 0201, accuracy up to +0.04mm

Minimum device accuracy: PLCC, QFP, BGA, CSP and other devices can be pasted, pin spacing up to +0.04mm

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Why choose LST

Experienced Manufacturing

18 years of pcb manufacturing experience
Authoritative manufacturing team

Short delivery time

Adoption of advanced technology and manufacturing equipment
Perfect production system
Fast turnaround

Good quality control

Mature ISO9001/IATF16949 quality management system.
Perfect ERP and MaS order management system.

Affordable price

Professional cost control engineers
Cooperation with many raw material companies.

Professional engineering

Free DFM inspection of PCB files and BOMs.
PCB engineering evaluation and advice.

Wide range of services

Specialized in medical, automotive, consumer electronics, new energy pcb.
Serving global enterprises

The introduction and advantage of Heavy copper pcb

What is heavy copper PCB

Heavy copper PCB is a high -current PCB that contains 3 ounces or more copper in the external and inner layers of the circuit board. Even if the total amount of copper is less than 3 ounces, if the thickness of the copper of the PCB is greater than 4 ounces/square foot, it is also considered to be a heavy copper PCB. This large amount of copper is used as an alternative to increasing the degree of wiring.

The characteristics of heavy copper PCB

Compared with ordinary PCB boards, heavy copper PCB has the following characteristics:

1. Strong current carrying capacity: The copper foil of heavy copper PCB is large, so it can carry larger currents, which is suitable for some occasions that require high -current conduction.

2. Excellent heat dissipation performance: The heat guidance rate of heavy copper PCB is high, good heat dissipation performance, and is suitable for some electronic equipment that requires good heat dissipation effects.

3. High mechanical strength: Due to the large thickness of copper foil, the mechanical strength of heavy copper PCB is relatively high, which can provide better mechanical support performance.

4. Good corrosion resistance: A layer of corrosion coating on the surface of the copper foil is plated, which enhances its corrosion resistance and extend the service life.

Application of Heavy copper pcb

New energy equipment

Satellite communications equipment

High Power Electronics

LED lighting equipment

Heavy copper PCB manufacturing process

The manufacturing process of heavy copper PCB is similar to ordinary PCB boards, but it is different in the thickness and electroplating process of copper foil:

1. Selection of heavy copper foil: The thickness of copper foil of heavy copper PCB is usually above 70um, and it can reach hundreds of UM according to specific needs.

2. Preparatory processing process: grinding and oil removal of heavy copper foil, etc. to ensure the flat surface and improve the adhesion.

3. Electroplating process: After the copper foil is treated with anode oxidation, the copper plating process is performed to increase the thickness of the copper foil.

4. Multi -layer pressure bumper: Multiple copper PCB plates are layed overlap, and high temperature and high voltage are used for pressing.

5. Final processing: including drilling, layer layer production, surface treatment and other steps, so that heavy copper PCB finished products meet the requirements.

Layer	1-48 layer
PCB Material	FR-1, FR-2, FR-4, FR4 Halogen Free, CEM-1, CEM-3, High TG, Aluminum
Board Thickness	0.2mm to 7mm
Max. Finished Board Size	500 x 500mm (20 x 20″)
Min. Drilled Hole Size	0.25mm (10mil)
Min. Line Width	0.075mm(3mil)
Minimum Line Spacing	0.075mm(3mil)
Surface Finish / Treatment	HALS/HALS lead free, Chemical Gold, Chemical tin, Immersion gold
Copper Thickness	Max.14 oz
Solder Mask Color	Green / Black / White / Red / Blue / Yellow
Hole Tolerance	PTH: ±0.075, NTPH: ±0.05