Tutorials

Summary:How to select PCB conformal coating: acrylic, epoxy, silicone, polyurethane, parylene, and UV curing—advantages, disadvantages, selection principles.

Summary:Learn about strain relief epoxy for rigid-flex PCBs — transition zone imperfections, epoxy types, and IPC-2223 design guidelines.

Summary:SMT stencils frame stainless-steel foil; choose electroformed, etched or laser-cut apertures, and framed, frameless or prototype stencils for paste printing.

Summary:Learn what PCB non-conformances are and how manufacturers fix them — customer actions, image documentation, communication review, and physical testing.

Summary:Copper weight in oz/ft2 sets trace thickness and current capacity; 1 oz is standard, while 3+ oz is heavy copper for power and harsh-environment boards.

Summary:Compare conductive and non-conductive PCB via fills, including thermal conductivity, CTE matching, stress resistance, and electrical signal transmission.

Summary:Learn how metal core PCBs (MCPCBs) solve thermal issues — traditional dissipation methods, MCPCB structure, and advantages over conventional approaches.

Summary:Learn about blind and buried vias in PCB design — definitions, aspect ratios, and how to configure and use them in PCB design software.

Summary:Learn about IPC standards for PCBs — what IPC is, why standards matter, key benefits for quality and cost, and the three product classes.

Summary:Add stiffeners where SMT parts, heavy components or ZIF connectors sit, not on the bend; FR4 laminates in cycle, PI needs a separate lamination.

Summary:Compare rigid and flexible PCBs by cost, applications, manufacturing steps, coverlay requirements and total cost of ownership for PCB design decisions.

Summary:Compare flex PCBs with stiffeners and rigid-flex PCBs by functionality, cost, assembly impact, component support, ZIF requirements and design flexibility.

Summary:Learn what multilayer PCBs are, their key benefits, disadvantages, real-world applications across industries, and how they compare to single-layer boards.

Summary:Learn about controlled impedance in PCBs — when it matters, how impedance control works, and microstrip impedance parameters for your circuit board.

Summary:Flex-to-install bends need 6x board thickness, 12x for 3+ layers; dynamic flex needs about 100x thickness, with copper on the neutral axis of the bend.

Summary:Learn what an annular ring is, how to calculate annular ring width, and DFM inspection options including tangency and minimum annular ring standards.

Summary:Learn how UV laser cutting meets modern FPC design trends — covering stress-free cutting, narrow cut widths, material applications, and precision depaneling.

Summary:Through vias are cheapest; blind and buried vias save routing space on multi-layer boards but cost more, and minimum drills run about 12 mil with 6 mil annulus.

Summary:Wave soldering suits through-hole parts at volume; reflow solders SMT paste in an oven. Use both sides, and control temperature profiles for yield.

Summary:Steer clear of CPU over-spec, steep clock edges, excessive decoupling caps, unused I/O, random resistor values and blind auto-routing in PCB design.

Summary:Matte mask is darker, rougher and cuts solder balls but scratches easier; gloss reflects light, can confuse vision systems, and shows scratches.

Summary:Learn how ENEPIG supports gold wire bonding, helps address black pad, enables thicker gold deposits, and uses nickel, palladium and immersion gold.

Summary:Gerber files are the PCB blueprint for fabrication; RS-274X embeds apertures in one file, while legacy RS-274D needs separate aperture and drill files.

Summary:Pin in Paste and through-hole reflow guidelines for component temperature, hole diameter, lead length, paste volume, stencil printing and inspection.

Summary:BGA soldering needs profiled reflow, 100C pre-bake, and X-ray to check misalignment, opens, bridges and cavities under 10% of ball area per IPC.

Summary:Learn how to create a PCB reflow profile for a 16-layer board with a high-density SMT connector, including TC placement, soak time, TAL and oven settings.

Summary:Clean PCBs with brushes, compressed air, IPA or demineralized water; understand ultrasonic cavitation and when aggressive cleaning damages SMDs and bond wires.

Summary:Solder mask design per IPC-SM-840: Class T vs H, dry film vs liquid LPISM, matte finish, keep mask off PTH lands and expose no adjacent conductors.

Summary:Fillet flex pads, add coverlay tie-downs, radius traces, stagger conductors across folds, and overlap stiffener with coverlay by at least 12 mil.

Summary:Select substrate for HDI fine lines, high-frequency 5G and heat: thin low-roughness copper, PTFE/PPO resins, low Dk/Df, and IMS metal core for thermal.

Summary:Learn how flexible and flex-rigid PCBs streamline assembly and improve reliability — covering design tips, bend radius, stiffeners, and shielding.

Summary:ENIG, immersion tin, silver and OSP oxidize in humidity; wear gloves, avoid skin oils, and store boards sealed to prevent dewetting after soldering.

Summary:Flex circuit stiffener purpose explained: FR4 and polyimide stiffener materials, thickness ranges, attachment methods, ZIF connector and bend constraint uses.

Summary:Explore flexible and flex-rigid PCB applications in automotive, medical, industrial, consumer electronics, and other compact electronic designs.

Summary:Learn about BGA in four steps — definition, advantages over traditional packages, PBGA/CBGA/TBGA types, and X-ray inspection parameters.

Summary:ENIG vs ENEPIG: black pad risk, wire bonding, solderability, and applications.

Summary:PCBA contamination comes from oxidized parts, flux residues, handprints, fixtures, tape, dust, smoke and ESD; each threatens assembly reliability.

Summary:Learn how to repair and solder BGA components — reflow soldering, X-ray inspection, desoldering with hot air, and step-by-step rework procedures.

Summary:Learn how to create Gerber files using Eagle — a step-by-step guide covering CAM processor, predefined jobs, Excellon drill files and output verification.

Summary:Learn what causes ENIG black pad, how nickel corrosion, phosphorus levels, reflow cycles and excessive immersion gold can affect PCB solder joints.

Summary:Learn PCB design for manufacture and assembly (DFMA) — DFM/DFA concepts, 10 general rules for cost reduction, modular design, and assembly optimization.

Summary:Learn about PCB assembly panel design — array/panelization, rails (breakaway), fiducial marks and tooling holes for automated assembly.

Summary:Compare PCB surface finishes — HASL, ENIG, ENEPIG, ImAg, ImSn, and OSP. Learn their processes, pros, cons, and how to choose the right one.

Summary:Jump scoring lifts V-score blades before waste rails keep panels rigid; call it out on drawings, allow 0.25 inch rail, and avoid premature part breakaway.

Summary:Ball Grid Array (BGA) explained — advantages, disadvantages, inspection methods, and 20+ common BGA package variants.

Summary:Learn when to use rigid-flex PCB technology — cost comparison, break-even analysis, design time, and 3D design tool requirements.

Summary:Learn the basic PCB design process — schematic creation, BOM management, Gerber documentation, component placement, thermal design, and DRC.

Summary:Countersink vs. counterbore in PCB fabrication: cone-shaped vs. flat-bottomed holes, and the angle, diameter, depth, side and plating specs required for each.

Summary:This Gold Phoenix PCB article explains flex PCB stiffeners — materials (FR-4, polyimide, stainless steel, aluminum), when to add them, and attachment methods.

Summary:This Gold Phoenix PCB article covers PCB assembly basics including surface mount, through-hole, and mixed technology — with their pros, cons, and history.

Summary:Learn PCB layout guidelines for SMPS design — covering grounding, trace widths, capacitor placement, creepage/clearance and IPC/UL standards.

Summary:Learn about PCB copper trace surface finishes — compare HASL, immersion tin, OSP, ENIG, hard gold and carbon ink plating methods with their pros and cons.

Summary:PCB stack-up design principles — EMC considerations, layer arrangement rules, and standard configurations for 4, 6, and 8-layer boards.

Summary:PCB safe distance depends on voltage and insulation class: primary-to-secondary clearance 4 mm, creepage 6.4 mm, plus reinforced insulation thickness rules.

Summary:When to panelize PCBs — covering cost savings, assembly efficiency, separation methods (mouse bites and V-scores), and manufacturer collaboration.

Summary:Pick components by footprint, package height, grounding and decoupling; run BOM for virtual parts, complete vendor data, sort designators and tie spare gates.

Summary:SMT stencil-prints paste, places SMDs and reflows in IR, convection or vapor-phase ovens, then cleans flux and runs AOI inspection on dense assemblies.

Summary:Include a 1:1 Gerber mechanical layer with exact board outline, slots, reference drill, PTH/NPTH marks, V-score calls and layer stack-up drawing.

Summary:PCB terms defined: annular ring, DRC, drill hit, finger, mouse bites, via, land, trace, plane and other common words PCB designers meet in layout.

Summary:Transfer netlists at 1 mil grid, fix missing footprints, forward/back annotate carefully, renumber designators top-to-bottom and locate parts by highlight.