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Visit from American partners

Visit from American partners

Visit from American partnersDec 03, 2025 Visit from American partners1

With the continuous development of science and technology, PCB board industry is also moving forward, technology upgrading has become a key element of the development of the industry...

Know MoreShenzhen Chengchi Circuit Technology Co., Ltd.

What Practical Value Does a PCB Manufacturer’s UL Certification Bring?

What Practical Value Does a PCB Manufacturer’s UL Certification Bring?

Many PCB suppliers list UL certification in their qualification documents. Still, numerous procurement and R&D personnel fail to grasp its true implications. Some regard it merely as a marketing credential for show, while others believe it is only necessary for export‑oriented products and irrelevan

What Practical Value Does a PCB Manufacturer’s UL Certification Bring?Oct 31, 2026 What Practical Value Does a PCB Manufacturer’s UL Certification Bring?290

DetailWhat Practical Value Does a PCB Manufacturer’s UL Certification Bring?

Six-Layer PCB Stackup Design: A Practical Guide to Avoiding Costly Mistakes，​3 Stackup Structures You Should Never Use

Six-Layer PCB Stackup Design: A Practical Guide to Avoiding Costly Mistakes，​3 Stackup Structures You Should Never Use

Six-layer PCB stackup design comes down to two golden rules: keep reference planes continuous and maintain symmetrical construction. Keep the power and ground planes 0.1–0.2 mm apart so you can tap the natural plane capacitance for filtering high-frequency noise. Break symmetry and the board's warp

Six-Layer PCB Stackup Design: A Practical Guide to Avoiding Costly Mistakes，​3 Stackup Structures You Should Never UseOct 27, 2026 Six-Layer PCB Stackup Design: A Practical Guide to Avoiding Costly Mistakes，​3 Stackup Structures You Should Never Use273

DetailSix-Layer PCB Stackup Design: A Practical Guide to Avoiding Costly Mistakes，​3 Stackup Structures You Should Never Use

PCB Delamination Post-Mortem: 3 Things We Failed to Verify

PCB Delamination Post-Mortem: 3 Things We Failed to Verify

1. Symptom: Cracked BGA Solder Joints and a "Chalky White" Board SurfaceAbout three months after deployment, an industrial control mainboard started suffering batch-level lockups at a customer site. Teardown revealed fractured solder joints under the BGA, and a distinct chalky white ring on the PCB

PCB Delamination Post-Mortem: 3 Things We Failed to VerifyOct 26, 2026 PCB Delamination Post-Mortem: 3 Things We Failed to Verify473

DetailPCB Delamination Post-Mortem: 3 Things We Failed to Verify

How to Specify Impedance Requirements When Ordering PCBs: Strategies for High-Frequency and High-Speed Board Evolution

How to Specify Impedance Requirements When Ordering PCBs: Strategies for High-Frequency and High-Speed Board Evolution

Driven by AI computing power and 5G communications, specifying impedance requirements when ordering a PCB has evolved from a simple matter of "controlling trace width" into a full-fledged signal-integrity engineering task. In the past, with a 4-layer board, hitting 50 Ω was easy. Today, with 20-laye

How to Specify Impedance Requirements When Ordering PCBs: Strategies for High-Frequency and High-Speed Board EvolutionOct 24, 2026 How to Specify Impedance Requirements When Ordering PCBs: Strategies for High-Frequency and High-Speed Board Evolution506

DetailHow to Specify Impedance Requirements When Ordering PCBs: Strategies for High-Frequency and High-Speed Board Evolution

When SMT joints suffer frequent bridging and cold soldering, and the stencil checks out—take a second look at the PCB solder mask openings

When SMT joints suffer frequent bridging and cold soldering, and the stencil checks out—take a second look at the PCB solder mask openings

For hardware R&D or SMT process engineers, the troubleshooting checklist when the production line reports solder bridging, tombstoning, or cold soldering typically includes stencil aperture design, solder paste activity, and the reflow soldering temperature profile. Yet all too often, after checking

When SMT joints suffer frequent bridging and cold soldering, and the stencil checks out—take a second look at the PCB solder mask openingsOct 23, 2026 When SMT joints suffer frequent bridging and cold soldering, and the stencil checks out—take a second look at the PCB solder mask openings507

DetailWhen SMT joints suffer frequent bridging and cold soldering, and the stencil checks out—take a second look at the PCB solder mask openings

Impedance calculations always off? Chances are you’ve fallen into the “reference plane” trap.

Impedance calculations always off? Chances are you’ve fallen into the “reference plane” trap.

✨ Many junior PCB design engineers, when laying out a board, simply connect the traces, set the trace-width rules, and consider the job done. Then the boards come back, and the measured characteristic impedance is completely wrong—sometimes absurdly high, sometimes scarily low.Before you rush to bla

Impedance calculations always off? Chances are you’ve fallen into the “reference plane” trap.Oct 22, 2026 Impedance calculations always off? Chances are you’ve fallen into the “reference plane” trap.121

DetailImpedance calculations always off? Chances are you’ve fallen into the “reference plane” trap.
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    Products

    PCBA OEM and ODM
    PCBA customization
    New energy PCBA
    Industrial control motherboard PCBA
    Consumer electronics PCBA
    Smart home PCBA
    Medical equipment PCBA

    capabilities

    PCB design and layout
    PCB Fabrication
    Purchasing & Supplier Management
    PCBA production
    PCBA testing and aging

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    Applications

    Automotive
    Consumer
    Industry
    Communications
    Medical

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    Shenzhen Chengchi Circuit Technology Co., Ltd.

    Email

    ccdltiktok@gmail.com

    Contact: +8618129931046 (Mr. Liao )

    Tel: 0755-23739764

    Tel: +8618168762195 (Miss Lin)

    Add: Lanhuahan Technology Industrial Park, Pingshan New District, Shenzhen

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