Name: High-Quality 4-Layer 4oz Heavy Copper PCB
Rating: 5.0 (50 reviews)

Product Parameters

General Specifications

Product Name:	4-Layer Heavy Copper PCB 4/4/4/4 oz for Power Electronics
Marketing Name:	High-Quality 4-Layer 4oz Heavy Copper PCB for Power Supply Devices with ENIG Surface Finish
Application:	Power Electronics, Power Supply Devices
Dimension (L x W):	80 mm x 80 mm
Board Thickness:	1.6 mm

Material and Construction

Base Material:	FR-4
Glass Transition Temperature (Tg):	170 °C
Copper Thickness per Layer:	4 oz (approx. 140 µm)
Number of Layers:	4
Surface Finish:	ENIG (Electroless Nickel Immersion Gold)

Electrical and Mechanical Parameters

Impedance Control:	Controlled impedance available
Minimum Hole Diameter:	0.5 mm
Minimum Line Width and Spacing:	0.3 mm
Solder Mask:	Standard high-quality solder mask suitable for heavy copper layers
Thermal Stability:	High, suitable for power electronics applications

Manufacturing and Quality

Copper Thickness Capability:	Up to 12 oz copper thickness batch manufacturing
Etching Precision:	Strict control to accommodate heavy copper layers
Corrosion Resistance:	Excellent due to ENIG surface finish
Solderability:	High solderability guaranteed with ENIG finish
Quality Control:	Full compliance with industry standards for heavy copper PCBs

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Product Details

Product Introduction

This high-quality 4-layer heavy copper PCB features a uniform 4-ounce copper thickness across all layers, specifically engineered for power electronics and power supply devices. Manufactured by Sheng Yi in China using premium FR-4 material with a Tg of 170, it delivers excellent durability and thermal stability necessary for demanding environments. The PCB measures 80mm x 80mm with a standard thickness of 1.6mm, supporting fine line and space control down to 0.3mm for complex circuit designs. The ENIG (Electroless Nickel Immersion Gold) surface finish ensures outstanding solderability and corrosion resistance. With precise impedance control and a minimum hole diameter of 0.5mm, this PCB meets strict manufacturing requirements for high-precision assemblies. Sheng Yi’s expertise in heavy copper PCB production enables batch manufacturing up to 12oz copper thickness, tackling challenges of etching and solder mask on thick copper layers. This product is trusted by international clients such as EMMERSON in the Philippines, underscoring its global reliability and performance in advanced power electronic systems.

Advantages and features

1. Uniform 4oz copper thickness on all four layers ensures superior current capacity and thermal management.
2. High-quality FR-4 substrate with Tg 170 provides excellent mechanical strength and heat resistance.
3. ENIG surface finish offers excellent solderability and long-term corrosion protection.
4. Fine line/space down to 0.3mm supports complex and precise circuit designs.
5. Impedance control and minimum hole diameter of 0.5mm meet high-precision manufacturing standards.
6. Sheng Yi’s proven expertise allows reliable manufacturing of heavy copper PCBs up to 12oz thickness.
7. Optimized for power electronics with robust electrical and thermal performance.

Application Scenario

Ideal for power electronics manufacturers, power supply device integrators, and advanced industrial equipment designers. Suitable for applications requiring high current capacity, superior thermal management, and durable, high-precision PCBs including industrial power modules, inverters, motor drives, and renewable energy systems.

Common problem

Q： If I want to purchase your company's 4-layer 4-ounce thick copper PCB, how can I obtain a quote and samples?

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A： You can contact us at any time for the latest customized quote. We will provide professional solutions based on your specific needs. Sample, packaging, and shipping information will also be confirmed through communication to ensure that we meet your individual requirements. We support multiple trade methods such as COMM, FOB, CFR, and CIF, and accept L/C, T/T, and D/A payments to ensure an efficient and convenient procurement process. We look forward to cooperating with you for mutual benefit.

Q： What is the surface treatment process for this PCB, and how is its long-term performance guaranteed?

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A： Our 4-layer, 4-ounce copper PCBs utilize an ENIG (Electrochemical Nickel Immersion Gold) surface treatment process. This process significantly improves PCB solderability, facilitating subsequent assembly, and effectively enhances corrosion resistance, ensuring long-term stable operation in harsh environments. ENIG treatment is an industry-recognized high-quality surface treatment solution, fully guaranteeing reliable performance in complex power electronics applications.

Q： Could you please introduce the application areas and target users of this 4-layer thick copper PCB?

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A： This product is primarily targeted at power electronics manufacturers, power supply integrators, and industrial equipment designers. It is suitable for applications with high current loads, stringent heat dissipation requirements, and harsh operating environments, such as industrial power modules, inverters, motor drives, and renewable energy systems. With its superior electrical and thermal performance, it meets the demands for high precision and stability, helping customers improve product performance and ensure system reliability.

Corporate Information

Kunshan Ruiheng Electronic Technology Co., Ltd.

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95%

On-time delivery rate

Within 1 hour

Response time

10,000㎡

Construction area

Service Guarantee

Service Information

Tel

+8619327453106

Email

[email protected]

Address

No. 188 Kangzhuang Road, Zhouzhuang Town, Kunshan City, Suzhou, Jiangsu Province

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Advisory Message

Pre-sales advice

1. If you have any questions about our high-precision printed circuit board (PCB) products or services, please feel free to contact us.
2. You can call our pre-sales consultation hotline: +8619327453106 to contact our professional team.
3. Alternatively, you can send your inquiry via email to [email protected], and we will reply to you as soon as possible.
4. Please leave your requirements, and we will provide a competitive quote based on them.

After-sales service

1. All rigid and flexible PCB products provided by Kunshan Ruiheng Electronics Technology Co., Ltd. are guaranteed in quality and ensure that they meet the customer's order specifications and standards.
2. If the product malfunctions due to manufacturing quality issues within 30 days of delivery, the customer may apply for a return, exchange, or free repair service.
3. Customers should provide valid orders and evidence of quality issues. The after-sales service team will respond promptly and assist in resolving the issues.
4. The company is not liable for product damage caused by improper use or unauthorized modifications by customers.
5. We are committed to continuously improving service quality to ensure customer satisfaction and long-term partnerships.

High-Quality 4-Layer 4oz Heavy Copper PCB