Quality & Testing 9 MIN READ SPI vs AOI in PCB Assembly: What Each Inspection Can and Cannot Detect Compare paste and optical inspection, understand coverage limits, and specify the records, X-ray checks, and electrical tests your assembly needs. Read article →
PCBA & DFM 9 MIN READ PCB Solder Mask vs Solder Paste Layers: Key Differences and Common Gerber Mistakes Understand mask openings, stencil apertures, and copper lands, then check common Gerber errors before PCB fabrication and assembly. Read article →
Fabrication 15 MIN READ Understanding PCB Copper Weight: 1 oz vs 2 oz and When You Need Heavy Copper Understand nominal and finished copper thickness, how 1 oz compares with 2 oz, when heavy copper is justified, and which manufacturing trade-offs designers must consider. Read article →
Quality & Testing 15 MIN READ PCB Delamination and Blistering: Root Causes and How Factories Prevent It Learn why PCB layers separate or blister during fabrication and reflow, how factories identify the failed interface, and which material, lamination, moisture, and thermal controls prevent recurrence. Read article →
Fabrication 13 MIN READ What Is PCB Silkscreen? Markings, Colors, and Design Rules Explained Learn what belongs on a PCB legend layer, how to select readable colors, and the text, pad-clearance, polarity, and edge rules that prevent manufacturing problems. Read article →
Fabrication 14 MIN READ IPC-4101 Laminate Specification: How to Call Out the Right Material Grade on Your Fab Drawing Learn how to specify IPC-4101 slash sheets, approved laminate grades, performance limits, and substitution rules without over-specifying your PCB. Read article →
Material Selection 14 MIN READ Tg, Td, CTE, and CTI: PCB Laminate Specs That Affect Reliability but Most Engineers Overlook Learn how four overlooked laminate specifications affect lead-free reflow survival, plated-hole reliability, dimensional stability, and high-voltage insulation design. Read article →
Fabrication 13 MIN READ PCB Bow and Twist: IPC Limits, Measurement Methods, and What Causes Warpage Understand IPC flatness limits, bow and twist measurement formulas, the main causes of PCB warpage, and how to prevent assembly problems. Read article →
Quality & Testing 12 MIN READ Black Pad Defect on ENIG Finish: Root Cause, Risk Factors, and How to Avoid It What black pad is, why it hides beneath the gold and wrecks ENIG solder joints, the process risk factors behind it, and how it is prevented and detected. By Linked Electronics Co., Limited. Read article →
Quality & Testing 12 MIN READ Flying Probe Can't Catch Everything: How 4-Wire Low-Resistance Testing Finds the Defects That Slip Through Why standard flying probe continuity testing misses marginal high-resistance joints, and how 4-wire Kelvin low-resistance testing catches them on power and heavy-copper boards. By Linked Electronics Co., Limited. Read article →
Quality & Testing 12 MIN READ How to Read a PCB Cross-Section Report: Layer Thickness, Plating, and Via Fill Explained What a PCB cross-section (microsection) report tells you — layer thickness, hole-wall plating, and via fill — and how to tell a good board from a problem one. By Linked Electronics Co., Limited. Read article →
Industry & Sourcing 13 MIN READ Passive Component Crisis 2026: MLCCs and Resistors Are Both in Short Supply Why MLCCs and chip resistors are tight at the same time in 2026, how a dual passive shortage compounds build risk, and one cross-passive playbook to protect your PCBA. By Linked Electronics Co., Limited. Read article →
Industry & Sourcing 12 MIN READ MLCC Prices Are Surging in 2026: What PCB Buyers Need to Know Right Now A practical 2026 action guide for PCB buyers facing surging MLCC prices and lead times — auditing single-sourced parts, qualifying alternates, and timing procurement. By Linked Electronics Co., Limited. Read article →
Industry & Sourcing 12 MIN READ How Rising MLCC Prices Affect Your PCBA BOM Cost — and What You Can Do About It Why MLCC prices rise, how they inflate your PCBA BOM cost, and the design and sourcing moves — alternates, consolidation, turnkey procurement — that limit the impact. By Linked Electronics Co., Limited. Read article →
Industry & Sourcing 12 MIN READ Edge AI and IoT: How Smaller, Denser PCBs Are Reshaping PCBA Manufacturing How edge AI and IoT are pushing PCBs smaller and denser, the HDI and fine-pitch SMT technologies behind compact PCBA, and what it means for DFM and sourcing. By Linked Electronics Co., Limited. Read article →
Industry & Sourcing 12 MIN READ PCB Design Challenges for AI Accelerator Cards: Power Delivery, Thermals, and Layer Count The three challenges that dominate AI accelerator board design — delivering hundreds of amps cleanly, removing hundreds of watts of heat, and fitting thousands of high-speed signals into 20-to-40 layers — and how they interact. By Linked Electronics Co., Limited. Read article →
Industry & Sourcing 12 MIN READ Why AI Server Demand Is Driving a Boom in High-Layer-Count PCBs Why AI accelerators and GPU servers push boards to 20, 30, and 40+ layers, what high-layer-count fabrication actually demands — registration, lamination, aspect ratio, via strategy, and yield — and what to look for in a capable partner. By Linked Electronics Co., Limited. Read article →
Materials & Compliance 11 MIN READ Halogen-Free PCB Laminates: Regulations, Performance Trade-offs, and Cost What halogen-free actually means (and why it is not the same as RoHS), the IEC 61249-2-21 thresholds, how halogen-free laminates compare to standard FR4 in thermal and electrical performance, and the real cost impact. By Linked Electronics Co., Limited. Read article →
Industry & Sourcing 12 MIN READ AI Hardware Demand, FR4 and MLCC Supply Pressure: What It Means for Your PCB Sourcing How the AI hardware boom is pressuring FR4, high-speed laminate, and MLCC supply — where the pressure actually concentrates, and six practical sourcing strategies to protect your project regardless of which way the market moves. By Linked Electronics Co., Limited. Read article →
Quality & Reporting 11 MIN READ What a Good PCBA Quality Report Should Include: Beyond the Photos Why photos alone prove nothing, and what a real PCBA quality report contains — AOI results, X-ray on hidden joints, ICT and functional test data, workmanship class, traceability, FAI, and Certificate of Conformance. By Linked Electronics Co., Limited. Read article →
Quality & Testing 11 MIN READ What Is PCB E-Test (Electrical Testing) and Is It Optional? Flying probe vs bed-of-nails, what opens and shorts actually mean, when 100% E-test is non-negotiable, and why Linked Electronics Co., Limited includes it as standard on every multilayer board — not as a premium add-on. Read article →
PCB Design Basics 11 MIN READ PCB Thickness Guide: Standard 1.6mm and When to Go Thinner or Thicker Why 1.6 mm became the industry standard, the full thickness ladder from 0.4 mm smart cards to 6.0 mm backplanes, when thinner or thicker is the right engineering choice, and the tolerance, warpage, and aspect-ratio consequences of each. By Linked Electronics Co., Limited. Read article →
PCB Fabrication 12 MIN READ PCB Vias Explained: Through-Hole, Tented, Plugged, and Filled Vias Compared A complete guide to PCB via types — through-hole, blind, buried, and microvias, plus the IPC-4761 protection options: tented, plugged, filled, and capped. What each costs, when each is genuinely needed, and how to write a via specification your fabricator can build without guessing. By Linked Electronics Co., Limited. Read article →
Signal Integrity 12 MIN READ How PCB Laminate Df (Loss Tangent) Kills Your Signal at 10 GHz and Above A signal-integrity engineer's guide to how dielectric loss destroys high-speed channels above 10 GHz — insertion loss, eye closure, BER impact, and the design choices that actually recover the lost margin. With worked examples for 25G SerDes and PCIe Gen5. By Linked Electronics Co., Limited. Read article →
Material Selection 13 MIN READ High-Speed PCB Material Selection Guide: FR4, Rogers, Megtron 6, and When to Use Each A practical brand-by-brand guide to high-speed PCB material selection — when standard FR4 is enough, when to step up to Megtron 4 or 6, when Rogers RO4350B or RT/duroid is required, and where Shengyi and Isola Tachyon fit. Includes a side-by-side comparison table and application decision tree. By Linked Electronics Co., Limited. Read article →
High-Speed Materials 12 MIN READ Dk and Df Explained: How to Choose the Right PCB Laminate for Your Signal Integrity Requirements A practical guide to dielectric constant (Dk) and loss tangent (Df) in PCB laminates — what the numbers actually mean, how to read a material datasheet, and how to choose between FR4, mid-loss, low-loss, and ultra-low-loss materials for designs from gigabit through 112 Gbps PAM-4. By Linked Electronics Co., Limited. Read article →
PCB DFM 11 MIN READ Component Courtyard Clearance: The DFM Rule Most Engineers Overlook A practical guide to component courtyard clearance per IPC-7351 — what the three density levels (A, B, C) actually mean, why courtyard violations cause solder bridging and rework problems, BGA and connector clearance rules, and the specific spacing Linked Electronics Co., Limited recommends for reliable SMT assembly. Read article →
SMT / DFM 11 MIN READ Fiducial Mark Placement: Small Feature, Big Impact on SMT Accuracy A practical guide to fiducial mark placement — global, local, and panel fiducials, why three is the right number, when fine-pitch BGAs require local fiducials, sizing and clearance rules, and how to specify fiducials correctly for SMT vision systems. By Linked Electronics Co., Limited. Read article →
High-Speed PCB 12 MIN READ Back-Drill (Controlled Depth Drilling): When to Use It and What to Tell Your Fab A practical guide to PCB back-drilling — why via stubs ruin high-speed signals at PCIe Gen4 and beyond, how controlled-depth drilling removes them, how to specify stub length and tolerance correctly, and when back-drilling is genuinely needed versus over-specified. By Linked Electronics Co., Limited. Read article →
PCB Drilling 11 MIN READ Aspect Ratio in PCB Drilling: Why It Matters More Than Your Hole Size A practical guide to PCB aspect ratio — why a 10:1 ratio is harder than a 0.2 mm hole, how it limits board thickness and via diameter, what fabricators can actually deliver, and strategies for high-aspect-ratio designs. By Linked Electronics Co., Limited. Read article →
PCBA Design 12 MIN READ Via-in-Pad Design: When It Helps and When It Hurts Your PCBA Assembly A practical guide to via-in-pad (VIP) design — when it solves BGA fanout, thermal, and RF problems, when it causes solder wicking and voiding in assembly, and how to specify filled and capped vias correctly per IPC-4761. By Linked Electronics Co., Limited. Read article →
Quality Standards 11 MIN READ IPC-6012 Class 2 vs Class 3: What the Difference Actually Means for Your Build A practical engineering guide to IPC-6012 Class 2 vs Class 3 acceptance criteria — annular ring, copper plating thickness, voids, conductor width, and what each class means for build cost, lead time, and reliability. By Linked Electronics Co., Limited. Read article →
HDI / MSAP 12 MIN READ MSAP vs SAP vs Subtractive: How Fine-Line PCBs Are Made A technical guide to the Modified Semi-Additive Process (MSAP) — how it enables 30–50 micron line and space for HDI boards, IC substrates, and high-speed designs. Compared with full SAP and traditional subtractive etching, by Linked Electronics Co., Limited. Read article →
Surface Finish 11 MIN READ How to Choose PCB Surface Finish: ENIG vs HASL vs OSP A complete comparison of PCB surface finishes — ENIG, HASL, lead-free HASL, OSP, immersion silver, and immersion tin. Understand flatness, shelf life, cost, RoHS compliance, and which finish suits your components and assembly process. By Linked Electronics Co., Limited. Read article →
HDI PCB 10 MIN READ What Is HDI PCB? A Beginner's Guide A complete guide to High Density Interconnect PCB — how microvias, blind vias, and buried vias work, the difference between 1st, 2nd, and 3rd order HDI, when to use HDI over standard multilayer, and design rules to follow. Includes HDI manufacturing process overview and FAQ from Linked Electronics Co., Limited. Read article →
PCBA Process 12 MIN READ PCB Assembly (PCBA) Process: From Gerber to Finished Board A complete walkthrough of the PCBA manufacturing workflow at Linked Electronics Co., Limited — solder paste printing, pick & place, reflow soldering, through-hole assembly, AOI and X-Ray inspection, and functional testing. Includes FAQs on BGA assembly, minimum component sizes, and turnkey services. Read article →