Blog
Practical guidance on PCB fabrication, DFM, stackups, surface finishes, and assembly models—written for engineers and buyers preparing RFQs.
Turnkey PCBA RFQ Checklist
Everything a turnkey PCB assembly quote request needs—fabrication data, BOM and sourcing notes, assembly instructions, and test requirements—in one reviewable package.
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PCB Assembly ID: PCB-0001 4 min read
Turnkey PCBA RFQ Checklist
Everything a turnkey PCB assembly quote request needs—fabrication data, BOM and sourcing notes, assembly instructions, and test requirements—in one reviewable package.
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PCB Assembly ID: PCB-0002 5 min read
How Much Does PCB Assembly Cost? A Cost-Driver Guide
PCB assembly cost is driven by setup charges, placement count and package mix, test and inspection scope, and sourcing model—here is how each factor moves the quote.
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PCB Assembly ID: PCB-0003 5 min read
Gerber, BOM, and Pick-and-Place File Checklist for PCB Assembly
The assembly-specific data package a PCBA quote needs: BOM structure, centroid/pick-and-place conventions, and assembly-drawing details that prevent placement and polarity errors.
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PCB Manufacturing ID: PCB-0004 4 min read
PET vs. Polyimide Flexible PCB
Polyimide is the standard substrate for flexible PCBs. PET is a lower-cost, lower-temperature alternative used in specific flexible-circuit applications—here is how they actually differ.
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PCB Design Guide ID: PCB-0005 5 min read
4-, 6-, and 8-Layer Rigid-Flex PCB Stackups
How rigid-flex layer count, flex-layer placement, and stiffener strategy change as you move from a simple 4-layer build to denser 6- and 8-layer constructions.
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PCB Design Guide ID: PCB-0006 5 min read
Flexible PCB for Camera Modules: Design and Manufacturing Notes
Camera-module flex circuits pack fine-pitch sensor connections, shielding, and a tight bend into a few millimeters of width. Here is what that construction actually requires.
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PCB Design Guide ID: PCB-0007 5 min read
Flex PCB Bend Radius Guide
Minimum bend radius for flexible PCBs depends on thickness, copper weight, and whether the bend is static or dynamic—here is how to estimate it and what changes the number.
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PCB Design Guide ID: PCB-0008 5 min read
Microstrip vs. Stripline vs. Coplanar Waveguide: Choosing an RF Trace Structure
Three transmission-line structures solve the same impedance target differently. Here is how microstrip, stripline, and coplanar waveguide trade off loss, shielding, and routing density.
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PCB Manufacturing ID: PCB-0009 5 min read
Rogers PCB vs. FR-4: When the Upgrade Is Worth It
FR-4 handles most digital boards fine. Here is the frequency, loss-budget, and tolerance reasoning that actually justifies moving to Rogers laminate—and when it does not.
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PCB Manufacturing ID: PCB-0010 11 min read
RO4350B vs. RO4003C: Dk, Loss, UL 94 V-0, and Which Rogers Laminate to Choose
RO4350B and RO4003C share a fabrication process and price band. The choice comes down to UL 94 V-0 flame rating, loss at your frequency, Z-axis CTE, and the design Dk you simulate with.
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PCB Design Guide ID: PCB-0011 5 min read
50-Ohm PCB Trace Design Guide
Why 50 ohms became the RF default, the variables that set trace width for a 50-ohm microstrip or stripline, and what to hold fixed versus leave to the fabricator.
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PCB Design Guide ID: PCB-0012 5 min read
PCB Impedance Tolerance: ±5% vs. ±10%
What ±10%, ±7%, and ±5% impedance tolerance actually cost in process control, and a framework for choosing the tolerance your design needs instead of the tightest number available.
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PCB Manufacturing ID: PCB-0013 5 min read
PCB Impedance Test Coupons and TDR Testing
How impedance test coupons are built, panelized, and measured by TDR, what the report should contain, and why a coupon result is only as good as its placement and structure.
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PCB Design Guide ID: PCB-0014 6 min read
How to Specify a Controlled Impedance PCB
A practical format for impedance tables: target value, tolerance, layer, reference plane, and fixed vs. fabricator-adjusted geometry, so the first quote matches the board you actually need.
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PCB Manufacturing ID: PCB-0015 8 min read
How to Choose PCB Materials: FR-4, Rogers, Polyimide, Metal Core
A material selection guide for rigid FR-4, high-Tg and low-loss laminates, flex polyimide, Rogers/PTFE, and metal core—matched to thermal, mechanical, and SI requirements.
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PCB Assembly ID: PCB-0016 5 min read
BGA Assembly and X-Ray Inspection Explained
Why area-array packages need paste and pad design review, when AOI is not enough, and how X-ray inspection fits prototype and production PCBA gates.
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PCB Design Guide ID: PCB-0017 5 min read
DFM Checklist Before PCB Production Release
A practical pre-production checklist covering fabrication, assembly, test access, and documentation—so your release package survives engineering review without a respin.
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PCB Assembly ID: PCB-0018 5 min read
SMT vs Through-Hole Assembly: Process and Cost Differences
When surface-mount wins, when through-hole still matters, and how mixed-technology boards sequence SMT, wave, and selective solder without yield surprises.
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PCB Design Guide ID: PCB-0019 9 min read
PCB Stackup Planning for Controlled Impedance
How to build a stackup table that fabricators can quote and your SI team can measure: reference planes, dielectric targets, differential pairs, coupons, and tolerance choices.
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PCB Assembly ID: PCB-0020 6 min read
Turnkey vs Consignment PCB Assembly: Which Model Fits Your Project
Who buys the components changes everything: cost visibility, lead time, risk ownership, and how much engineering time you spend. A practical guide to choosing between turnkey, consignment, and hybrid assembly.
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PCB Design Guide ID: PCB-0021 9 min read
Rigid-Flex PCB Design Guide: Bend Radius, Stiffeners, and Coverlay
The mechanical decisions that make or break rigid-flex designs: bend radius rules, static vs dynamic flexing, stiffener strategy, coverlay openings, and stackup choices.
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PCB Manufacturing ID: PCB-0022 14 min read
PCB Surface Finish Comparison: HASL vs ENIG vs OSP vs Immersion Silver
A practical comparison of the four most common PCB surface finishes—solderability, flatness, shelf life, cost, and the failure modes each one brings.
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PCB Design Guide ID: PCB-0023 6 min read
HDI PCB Design Guide: Microvias, Stackups, and Cost Drivers
How microvia structures, sequential lamination, and via-in-pad decisions drive HDI cost and reliability—and how to choose the simplest stackup that routes your design.
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PCB Design Guide ID: PCB-0024 6 min read
What to Expect from a DFM Review on Your PCB Stackup
What a real PCB DFM review covers—annular rings, mask slivers, copper balance, finish trade-offs, HDI and flex risks, and test access—and how to answer questions without slowing your quote.
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PCB Manufacturing ID: PCB-0025 6 min read
Preparing Gerber Files for Smooth PCB Manufacturing
A practical Gerber and fabrication-data checklist: layer naming, drill parity, apertures, stackup notes, impedance tables, and panelization decisions that cut RFQ back-and-forth before tooling.
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Technical Briefings
Occasional deep-dives into PCB manufacturing trends, engineering best practices, and material innovations from our lead engineers.