KB-6160A FR-4 Copper Clad Laminates: Properties, Specifications & Datasheet

Table of Contents

What Is KB-6160A FR-4 Copper Clad Laminate?

KB-6160A FR-4 copper clad laminate is a widely used PCB base material composed of woven glass fiber reinforced epoxy resin, laminated with copper foil on one or both sides. It belongs to the standard FR-4 family, designed for general-purpose printed circuit board fabrication.

From an engineering standpoint, KB-6160A is positioned as a cost-effective and reliable substrate suitable for multilayer and double-sided PCB designs where ultra-high frequency performance is not required.

This material is commonly selected in projects that demand:

Stable electrical insulation
Moderate thermal resistance
Consistent mechanical strength
Compatibility with standard PCB processes

For most PCB manufacturers, including high-volume production environments, KB-6160A serves as a baseline laminate option for consumer and industrial electronics.

KB-6160A FR-4 Copper Clad Laminates

What Does FR-4 Mean in KB-6160A Material?

FR-4 stands for Flame Retardant Grade 4, a classification defined by flame resistance and material composition.

The structure of KB-6160A FR-4 laminate includes:

Glass fiber cloth: mechanical reinforcement
Epoxy resin system: electrical insulation and bonding
Copper foil layers: circuit formation

Key characteristics of FR-4 materials like KB-6160A include self-extinguishing behavior under flame exposure, good dielectric stability across a broad frequency range, and high dimensional stability during thermal cycling.

Compared with lower-grade laminates, FR-4 provides a balanced electrical and mechanical profile, making it the industry standard for PCB substrates.

KB-6160A Datasheet Overview

Below is an expanded datasheet-style overview for KB-6160A FR-4 copper clad laminate. These values are typical reference ranges for PCB material evaluation. Final specifications should be confirmed with the original supplier datasheet before production.

General Material Properties

Parameter	Typical Value	Test Method	Notes
Base Material	Glass Fiber + Epoxy Resin	–	Standard FR-4 composite structure
Resin System	Epoxy Resin	–	Commonly used in general-purpose PCB laminates
Material Type	Copper Clad Laminate	–	Used as the base material for rigid PCB fabrication
Flammability Rating	UL 94V-0	UL 94	Self-extinguishing flame-retardant performance
Typical Color	Yellowish / Light Green	Visual	Color may vary depending on supplier and production batch

Thermal Properties

Parameter	Typical Value	Unit	Notes
Glass Transition Temperature (Tg)	130-140	°C	Standard Tg FR-4 range
Decomposition Temperature (Td)	>300	°C	Measured by TGA at 5% weight loss
Z-axis CTE Below Tg	50-70	ppm/°C	Affects plated through-hole reliability
Z-axis CTE Above Tg	250-300	ppm/°C	Expansion increases rapidly above Tg
Thermal Conductivity	0.25-0.35	W/m·K	Typical level for standard FR-4 materials
Time to Delamination T260	60-120	minutes	Indicates resistance to thermal stress
Time to Delamination T288	10-20	minutes	Important for lead-free soldering evaluation

Electrical Properties

Parameter	Typical Value	Unit	Test Condition
Dielectric Constant (Dk)	4.2-4.6	–	At 1 MHz
Dielectric Constant (Dk)	About 4.0	–	At 1 GHz, approximate reference
Dissipation Factor (Df)	0.015-0.020	–	At 1 MHz
Volume Resistivity	≥10⁷	MΩ·cm	Dry condition
Surface Resistivity	≥10⁶	MΩ	Standard insulation reference
Dielectric Breakdown Strength	≥40	kV/mm	High insulation resistance between conductive layers

Mechanical Properties

Parameter	Typical Value	Unit	Notes
Flexural Strength, Lengthwise	≥400	MPa	Shows board rigidity along the glass fiber direction
Flexural Strength, Crosswise	≥300	MPa	Direction-dependent mechanical strength
Peel Strength, 1 oz Copper	≥1.0	N/mm	Indicates copper adhesion to laminate
Density	About 1.85	g/cm³	Typical density of FR-4 laminate
Water Absorption	0.10-0.20	%	Low moisture absorption helps maintain insulation stability

Copper Foil Specifications

Parameter	Options	Notes
Copper Weight	0.5 oz, 1 oz, 2 oz	Common copper thickness options for standard PCB fabrication
Heavy Copper Option	Up to 3 oz, custom	Used for higher-current power boards when supported by supplier
Copper Type	ED Copper	Electrodeposited copper is commonly used for rigid PCBs
Copper Surface	Medium roughness	Surface roughness can influence high-speed signal loss

Thickness and Construction Options

Parameter	Typical Range	Notes
Core Thickness	0.1 mm – 2.0 mm	Used for inner layers and double-sided PCB construction
Finished PCB Thickness	0.4 mm – 3.2 mm	Depends on stack-up, copper weight, and layer count
Common Prepreg Styles	7628, 2116, 1080	Used for bonding multilayer PCB structures
Layer Count Compatibility	1-12 layers typical	Higher layer counts may require tighter process control

Processing and Fabrication Characteristics

Parameter	Performance	Notes
Drillability	Good	Suitable for standard mechanical drilling
Plating Adhesion	Good	Supports reliable plated through holes and vias
Etching Performance	Stable	Supports clean trace definition in general PCB designs
CAF Resistance	Moderate	Suitable for general applications with proper design spacing
Solder Resistance	Good	Compatible with standard soldering and lead-free reflow processes

Environmental and Reliability Performance

Parameter	Typical Performance	Notes
Moisture Resistance	Good	Maintains insulation performance in normal humidity conditions
Thermal Shock Resistance	Moderate	Depends on board thickness, via structure, and copper distribution
Chemical Resistance	Good	Compatible with standard PCB wet processes
Long-Term Reliability	Stable	Suitable for mass-production consumer and industrial electronics

Design-Related Parameters

Parameter	Typical Value	Design Impact
Impedance Stability	Moderate	Suitable for controlled impedance designs with proper stack-up control
Signal Loss	Medium	Acceptable for many low-to-mid frequency circuits
Recommended Operating Frequency	Below 1-2 GHz	Higher frequencies may need low-loss materials
Z-axis Expansion Risk	Higher above Tg	Important for via reliability during thermal cycling
Suitable PCB Types	Digital, power, control, consumer electronics	Best suited for general-purpose rigid PCB applications

Engineering Insight

From a PCB design and manufacturing perspective, KB-6160A provides predictable dielectric behavior, reliable mechanical strength, and cost-effective process compatibility. It is a practical FR-4 laminate choice for standard rigid PCB projects that do not require advanced high-frequency or high-temperature material performance.

Engineers should still evaluate signal speed, thermal cycling, via structure, copper thickness, and operating environment before confirming KB-6160A for production. For RF, microwave, high-speed, or high-reliability automotive designs, high Tg FR-4 or low-loss laminate may be a better option.

How KB-6160A Compares to Other FR-4 Materials?

Selecting the right laminate often comes down to performance, reliability, cost, and availability. KB-6160A is usually chosen when the design needs proven FR-4 performance without the additional cost of specialty laminates.

Material Type	Dielectric Constant	Tg	Cost Level	Typical Application
KB-6160A	4.2 to 4.6	About 135°C	Low	General electronics
High Tg FR-4	4.0 to 4.5	170°C to 180°C	Medium	Automotive and industrial electronics
Rogers RO4350B	About 3.5	Above 280°C	High	RF and microwave circuits
PTFE Material	About 2.2	Above 300°C	Very high	High-frequency RF applications

Engineering Insight

KB-6160A is ideal when cost control and manufacturability are priorities.
High Tg FR-4 is preferred for higher thermal stress environments.
Rogers and PTFE materials are selected when high-frequency signal integrity is critical.

What Are the Typical Applications of KB-6160A Laminates?

Due to its balanced performance, KB-6160A is used across multiple PCB application areas. These applications usually require reliable insulation, standard copper circuitry, and stable mechanical strength.

Consumer electronics
Home appliance control boards
Industrial control systems
Power supply and converter circuits
LED driver PCBs
Communication devices for non-RF critical sections

These applications share a common requirement: reliable performance without excessive material cost. This makes KB-6160A a practical choice for many standard PCB projects.

Why Choose KB-6160A for PCB Manufacturing?

From a manufacturing perspective, KB-6160A offers several advantages for PCB fabrication and assembly.

Cost Efficiency

KB-6160A is more affordable than many high-performance laminates, making it suitable for mass production and cost-sensitive PCB projects.

Process Compatibility

It works well with standard PCB fabrication processes, including drilling, copper plating, imaging, etching, solder mask application, and surface finishing.

Supply Chain Stability

As a common FR-4 laminate type, KB-6160A is generally easier to source than specialty materials. This helps reduce lead time pressure during PCB production planning.

Reliable Electrical Performance

The material offers consistent dielectric behavior for many low-to-mid frequency circuits. This supports predictable circuit operation in general electronics.

For OEMs and EMS providers, these advantages can support lower production risk, better yield, and more stable manufacturing schedules.

How Is KB-6160A Copper Clad Laminate Used in PCB Fabrication?

KB-6160A copper clad laminate is processed through conventional PCB manufacturing steps. Its compatibility with standard fabrication lines makes it suitable for double-sided and multilayer PCB production.

Typical Process Flow

Material Cutting: laminate sheets are cut into production panels.
Drilling: through holes and vias are formed according to the PCB design.
Copper Plating: hole walls are metallized to create electrical connections.
Imaging and Etching: circuit patterns are transferred and unwanted copper is removed.
Solder Mask Application: the board surface is protected from oxidation and solder bridging.
Surface Finish: common options include HASL, ENIG, OSP, immersion silver, and immersion tin.
Final Testing: electrical testing and visual inspection confirm board quality.

Because KB-6160A integrates smoothly into this workflow, it helps reduce process complexity and supports consistent production output.

Design Considerations When Using KB-6160A

Although KB-6160A is widely used, engineers should evaluate several design factors before selecting it for a PCB project.

Signal Integrity

KB-6160A is suitable for many general digital and analog circuits. For very high-speed or GHz-level signals, a lower-loss laminate may provide better impedance stability and reduced signal attenuation.

Thermal Management

This material can support moderate thermal loads. For power circuits, engineers may use wider copper traces, copper pours, thermal vias, and proper component spacing to improve heat spreading.

Layer Stack-Up

KB-6160A can be used in multilayer PCB stack-ups. Proper prepreg selection, dielectric thickness control, and copper balance are important for dimensional stability and lamination quality.

Reliability

For standard operating environments, KB-6160A performs reliably. For harsh temperature cycling, automotive electronics, or high-power systems, high Tg FR-4 or other advanced materials may be considered.

KB-6160A vs High-Frequency Materials: When Not to Use It?

KB-6160A is versatile, but it is not designed for every application. Engineers should avoid using it in circuits where dielectric loss, impedance precision, and frequency stability are major design requirements.

Applications That May Require Other Materials

RF circuits above 2 GHz to 3 GHz
Microwave communication boards
5G antenna modules
Radar boards
Very high-speed digital interfaces

Main Reasons

Higher dielectric loss compared with RF laminates
Less stable impedance at high frequency
Greater signal attenuation in demanding RF designs

In these cases, materials such as Rogers, PTFE, or other low-loss laminates can provide stronger performance for high-frequency PCB applications.

FAQs About KB-6160A FR-4 Copper Clad Laminates

Is KB-6160A suitable for high-speed PCB design?

KB-6160A can handle moderate-speed signals, but it is not optimized for high-speed or RF designs. Engineers working with GHz-level signals usually select low-loss laminates instead.

What is the Tg value of KB-6160A?

The Tg value is typically around 130°C to 140°C, which places it in the standard FR-4 category. This makes it suitable for many general-purpose PCB applications.

Can KB-6160A be used in multilayer PCBs?

Yes, KB-6160A can be used in multilayer PCBs. It is commonly applied in standard 4-layer to 12-layer designs where cost, availability, and reliable fabrication performance need to be balanced.

What copper thickness options are available?

KB-6160A laminates are commonly available with copper thickness from 0.5 oz to 2 oz. The final selection depends on current-carrying requirements, thermal needs, and fabrication capability.

How does KB-6160A compare to standard FR-4?

KB-6160A belongs to the standard FR-4 laminate family. Its performance is aligned with general-purpose PCB material expectations, including electrical insulation, flame resistance, mechanical strength, and process compatibility.

Conclusion: Is KB-6160A the Right Choice for Your PCB Project?

KB-6160A FR-4 copper clad laminate remains a practical and efficient material choice for a wide range of PCB applications. It offers a strong balance between electrical performance, mechanical reliability, manufacturing compatibility, and cost control.

For engineers designing consumer electronics, industrial control boards, power supply circuits, or standard multilayer PCBs, KB-6160A can provide predictable results without unnecessary material complexity.

For high-frequency, high-temperature, or high-reliability applications, engineers may need to compare KB-6160A with high Tg FR-4, Rogers, PTFE, or other specialty PCB materials before finalizing the stack-up.

Need Help with KB-6160A PCB Manufacturing?

At EBest Circuit, we provide PCB fabrication, PCBA assembly, DFM analysis, material selection support, and stack-up recommendations for different engineering projects.

Our team supports FR-4 PCB manufacturing, multilayer PCB fabrication, component sourcing, assembly, testing, and box-build integration. If you are evaluating KB-6160A or other PCB laminates for your next project, we can help review your design and recommend a practical manufacturing solution.