4L FR4 Heavy Copper Printed Circuit Boards Green Soldermask White Silkscreen PCB

Product Specification

4L FR4 Heavy Copper Printed Circuit Boards Green Soldermask White Silkscreen PCB Assembly Service​ 

Detail specification about Mobilephone Blue Soldermask White Silkscreen FR4 Electronic Printed Circuit Board

Brief introduction about Shenzhen KAZ Circuit Co,. Ltd.

Brief introduction

    Shenzhen KAZ Circuit Co., Ltd, found in 2007, is a PCB and PCBA custom-made manufacturer. It's commitment to high precision single, double-sided, multilayer printed circuit board and metal substrate circuit board production,which is a hightech enterprises including amnufacture, sales, service and so on.

1. We are confident to provide you quality products with factory-directed price within the fastest delivery time!

What we can do for you

    Prompt delivery: 2L: 3-5days

    4L: 5-7days

    24h/48h: urgent order

    Company size: About 300 employees

What KAZ Circuit can do for you:

• PCB & PCBA Design
• PCB manufacturing (prototype, small to medium, mass production)
• Components Sourcing
• PCB Assembly/SMT/DIP

To get a full quotation of the PCB/PCBA, pls provide the information as below:

• Gerber File, with detail specification of the PCB
• BOM List (Better with excel fomart)
• Photoes of the PCBA (If you have done this PCBA before)

Manufacturer Capacity:

Following are the key steps of Heavy Copper PCB Assembly Service:

Materials and Components:

    High Copper Content PCB (2oz, 4oz or 6oz copper thickness)

    Heavy Electronic Components (e.g. Power Transistors, High Power Resistors, Heat Sinks)

    High Temperature Solder (e.g. High Melting Point Lead-Free Solder)

    High Quality Solder Paste

PCB Assembly Process:

PCB Preparation:

    Clean PCB surface thoroughly to remove any contaminants.

    Apply solder mask and silk screen as per component placement requirements.

    Drill and through holes for component leads and mounting.

Component Placement:

    Carefully place components on PCB ensuring proper orientation and alignment.

    Secure component leads to PCB pads using high temperature solder paste.

Reflow Soldering:

    Place assembled PCB in reflow oven or use hot air rework station.

    Heat PCB to appropriate reflow temperature (usually 230°C to 260°C) to melt solder paste.

    Ensure proper solder wetting and joint formation for all component connections.

Inspection and Testing:

    Visually inspect the PCB for any solder bridges, cold joints, or missing components.

    Perform electrical tests to verify the functionality of the circuit, such as continuity, resistance, and voltage measurements.

    Perform any necessary functional tests to ensure the circuit meets design specifications.

Thermal Management:

    Identify high-power components that require additional cooling.

    Install heat sinks or other thermal management solutions as needed to effectively dissipate heat.

    Ensure proper thermal interface between components and heat sink.

Conformal Coating (Optional):

    Apply conformal coatings, such as acrylic or polyurethane, to protect the PCB and components from environmental factors such as moisture, dust, and corrosion.

Final Assembly and Packaging:

    Secure the PCB in a suitable housing or enclosure, if required.

    Pack the assembled PCB for safe shipping and delivery.

Key Considerations for Heavy Copper PCB Assembly:

    Ensure the PCB material and copper thickness are appropriate for the power requirements of the application.

    Select components with appropriate power ratings and heat dissipation capabilities.

    Use high-temperature solder and solder paste to withstand higher operating temperatures.

    Implement proper thermal management solutions to prevent components from overheating.

More photos