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소개
When you specify copper board for applications such as busbars, roofing, heat exchangers, or PCB manufacturing, choosing the right thickness is critical. The thickness of the copper board affects conductivity, mechanical stiffness, weight, flexibility, and overall cost. Using the right thickness ensures reliability and performance without over-costing or under-specifying.
Understanding Copper Plate Thickness Measurements
Copper sheet thickness can be expressed in a variety of formats: ounces per square foot, gauge number, thousandths of an inch (mil), or millimeters.
Lightweight copper sheet may weigh about 16 ounces per square foot and be about 0.55 mm thick.
Heavyweight copper sheet may be over 1 mm thick and weigh much more.
Familiarity with common thickness conversions is essential to accurately selecting copper sheet.
Typical Thickness Ranges of Copper Plates
Ultra-Thin Foil and Micro-Copper (Less than 0.03 mm)
Used in circuit board lamination, shielding, and decorative foils. Foils can range from just a few microns up to 0.03 mm (~1.2 mils), and are ideal when flexibility and minimal thickness matter most.
Lightweight Sheet (0.3–0.8 mm / ~8–20 oz)
Common weights include 8 oz (~0.27 mm), 16 oz (~0.55 mm), and 20 oz (~0.69 mm). These sheets are widely used in architectural trim, gutters, sinks, signage, and light fabrication work where both formability and moderate strength are needed.
Medium to Heavy Sheet (1.0–1.6 mm / ~32–48 oz)
Medium-heavy copper plates around 1.1–1.6 mm support applications such as heat exchangers, heavy roofing, structural trim components, or industrial tinned parts. They balance stiffness and conductivity.
Thick Copper Plate (Above 2 mm up to inches)
Plates in the range of 2 mm to several inches are used in tooling, heavy bus bar production, industrial machinery blanks, or custom fabrication. These “plates” often require special handling and cutting equipment.
Application-Specific Considerations for Copper Plate Thickness
Electrical and Power Applications
For bus bars, grounding plates, and bus collectors, engineers often choose thick copper plates (2–10 mm) to minimize electrical resistance and maximize thermal performance.
Architectural and Decorative Use
Applications such as roofing, flashing, sink fabrication, and decorative panels typically use sheet thicknesses between 0.3 mm (8 oz) and 1.0 mm (32 oz), balancing durability and ease of forming.
Electronics, PCBs, and Shielding
Printed circuit boards often use copper foil layers from 17 µm to over 100 µm, depending on current capacity or signal integrity needs. Shielding or laminated copper foil applications also fall in this ultra-thin category.
Industrial Fabrication & Heavy Equipment
Heavy copper sheets over 2 mm thick are common in pressure vessels, equipment plating, welding components, or stamped industrial parts where robustness and machining tolerance are critical.
Comparison Table: Copper Plate Thickness by Use Case
| Thickness Range | Description / Approximate Size | Typical Applications |
|---|---|---|
| <0.03 mm (Ultra-thin) | Copper foil, under 1 mils | PCB layers, EMI shielding, decorative foil |
| 0.3–0.8 mm (8–20 oz) | Lightweight sheets | Gutters, trim, sinks, facades, signage |
| 1.1–1.6 mm (32–48 oz) | Medium-heavy sheet | Heat exchangers, robust architectural panels |
| >2 mm to inches | Thick industrial plates | Bus bars, tooling blanks, structural fabrication |
Why Choose the Right Thickness? Performance Impact
Thicker copper sheet improves conductivity, structural support and durability, but adds weight and cost. Thinner copper sheets offer flexibility, easier handling and lower material costs, but may compromise rigidity or current-carrying capacity.
Therefore, select the thickness according to the application requirements to ensure a balance of performance and cost-effectiveness.
Tips for Selecting Proper Copper Plate Thickness
- Clearly define your goals: Are aspects like flexibility, electrical performance, or load-bearing capacity most important?
- Check the copper weight-to-thickness conversion relevant to your supplier or industry standard.
- Request certified material documentation to confirm gauge tolerance and copper purity.
- Test sample panels or prototypes to ensure formability, finish, or fit meet expectations.
- Evaluate whether your fabrication process supports bending, cutting, or welding at your chosen thickness.
결론
Understanding copper sheet and its common thicknesses can help you match the material to your performance needs. If you need help selecting, sourcing, or customizing copper sheet for your project, we are ready to provide expert support.
Contact us today to discuss your needs and ensure you get the right copper sheet thickness for your application.
자주 묻는 질문
What thickness of copper plate is typically used for bus bars?
Thick copper plates, usually 2 mm or more, provide low electrical resistance and structural durability—essential for power distribution bars.
Can you hand-form a very thin copper sheet?
Yes—copper foil under ~0.03 mm is highly malleable and easily shaped by hand, though thicker sheets require tools or machinery.
Do copper gauge systems differ from other metals?
Yes—copper gauge charts are unique to copper and use ounces per square foot rather than standard steel or aluminum gauge standards.
Does thicker copper always yield better performance?
Not always. For flexible panels or decorative uses, thinner gauges may be better, as long as the copper meets conductivity or strength needs.
What is the thinnest copper plate commonly manufactured?
Copper foil under 0.03 mm thickness (about 17 µm or 1 oz) is common; specialty foil can go thinner but is more fragile.
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