Altium Designer PCB Design Guide

20 October 2026
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Altium Designer is a professional electronic design automation (EDA) platform that integrates schematic capture, PCB layout, design-rule verification, 3D board visualization, and manufacturing documentation. A reliable Altium Designer PCB design workflow begins with verified component libraries and electrical connectivity, continues through layer-stack planning and controlled routing, and ends with fabrication and assembly data that match the released design revision. For a custom PCB or HDI PCB prototype, engineers must establish trace width and spacing, drill geometry, copper thickness, impedance, material selection, and acceptance criteria before sending files to a PCB board manufacturer.

Altium Designer Fundamentals

What Is Altium Designer?

Altium Designer is commercial PCB design software used to develop electronic products from circuit schematics through manufacturing release. Its integrated environment allows engineers to manage component connectivity, physical board layout, electrical constraints, and production documentation within a coordinated project.

A typical engineering project contains schematic documents, PCB documents, component libraries, design rules, output configurations, and fabrication notes. The software can support simple two-layer boards as well as complex multilayer and HDI constructions.

The design platform does not determine manufacturing quality by itself. A board that passes software checks can still fail production if the footprints, layer stack, drill requirements, or assembly data are incorrect.

Altium Designer Capabilities

Unified Design Environment

The unified design environment links schematic connectivity with the physical PCB layout. When a component or net changes, engineers can synchronize the PCB rather than manually reconstructing the connections.

This reduces the risk of mismatched netlists, but synchronization changes must still be reviewed. Replacing a component with a different package, for example, may affect pad geometry, routing, mechanical clearance, and assembly orientation.

Smart Interactive Routing

Interactive routing supports track placement while considering applicable design constraints. Depending on configuration and available features, routing can work around obstacles, manage clearances, and assist with differential pairs.

A 0.15 mm track width and 0.15 mm clearance may be appropriate for some conventional designs. Fine-pitch HDI boards may require 0.075/0.075 mm or smaller features, subject to the fabricator's qualified process.

The routing engine can enforce entered rules; it cannot determine whether those rules represent the correct manufacturing limits.

Cloud and Collaboration

Cloud-connected collaboration can support shared component data, design reviews, version tracking, and manufacturing communication, depending on the available workspace and subscription.

For production projects, revision control is essential. The schematic, PCB layout, BOM, fabrication files, and assembly drawings must identify the same approved revision.

Manufacturing Outputs

Altium Designer supports generation of fabrication and assembly data, including Gerber or Gerber X2, ODB++, NC drill files, drawings, BOMs, and component placement information, depending on project configuration.

The manufacturer should receive a complete release package rather than an isolated PCB layout file. Missing stack-up or assembly details can cause quotation changes, manufacturing delays, and incorrect component placement.

Altium Designer PCB Design Guide

PCB Design Workflow

A controlled design process separates electrical verification, physical layout, manufacturing feasibility, and assembly readiness.

Design stage	Primary output	Engineering verification
Project setup	Project and library configuration	Revision and component-data control
Schematic capture	Electrical circuit definition	Connectivity and electrical rule checks
Simulation	Circuit behavior analysis	Model assumptions and operating limits
Schematic-to-PCB transfer	Footprints and net connectivity	Pin mapping and synchronization
Board planning	Outline and layer stack	Material, thickness, and impedance
Placement and routing	Physical copper layout	Clearance, return paths, and thermal behavior
DRC	Design-rule report	Violations and approved exceptions
Manufacturing output	Fabrication and assembly package	Data completeness and revision consistency

Project and Workspace Setup

Create a dedicated project and define its release structure before schematic capture.

The project should identify:

Product name and hardware revision.
Component library source and approval status.
Board dimensions and maximum component height.
Layer count and intended board thickness.
Manufacturing and assembly requirements.
Output formats and revision-control process.

A conventional four-layer prototype might use a 1.6 mm FR-4 stack-up with 35 μm outer copper. However, the exact dielectric thicknesses must be established with the manufacturer before calculating controlled-impedance traces.

Component libraries require particular attention. A symbol may have correct electrical pins while its assigned footprint uses the wrong package dimensions or pad numbering.

Schematic Capture

Schematic capture defines the circuit's electrical structure using components, wires, net labels, power symbols, and hierarchical sheets.

A practical workflow includes:

Place approved component symbols.
Assign manufacturer part numbers and values.
Connect power, ground, and signal nets.
Identify critical interfaces and operating voltages.
Verify connector pinouts and polarity.
Run electrical rule checks.
Resolve unintended errors before PCB transfer.

For a 3.3 V microcontroller design, verify regulator output tolerance, component voltage ratings, reset circuitry, and decoupling connections. Passing an electrical rule check does not establish that the circuit will operate correctly under all conditions.

Circuit Simulation and Analysis

Circuit simulation can help evaluate analog behavior, power-supply response, and selected signal characteristics before fabrication. Available simulation functions and models depend on the software configuration and installed resources.

Useful analyses include:

DC operating-point verification.
Transient startup and switching response.
Frequency response of analog filters.
Component tolerance and operating-condition studies.
Signal-integrity analysis for supported interfaces and models.

Simulation results should be checked against component datasheets and prototype measurements. Inaccurate models, omitted parasitics, and unrealistic load assumptions can produce misleading results.

Schematic-to-PCB Transfer

Transfer the verified schematic connectivity and component footprints into the PCB document.

Before placement, check that every component has:

A unique reference designator.
A verified physical footprint.
Correct pin-to-pad mapping.
A valid manufacturer part number.
Appropriate mechanical and assembly information.

After an engineering change, synchronize the documents again and review the proposed changes before applying them.

Board Planning and Layer Stack

Layer-stack planning determines routing space, impedance, power distribution, and manufacturing complexity.

A representative six-layer stack might allocate:

L1: Components and signal routing.
L2: Continuous ground reference.
L3: Signals or power distribution.
L4: Power distribution or signals.
L5: Ground reference.
L6: Signals and components.

Actual dielectric thicknesses, copper weights, and impedance values must be calculated for the selected laminate.

For an HDI PCB prototype, a 1+N+1 structure introduces one build-up layer on each side of the core. A 2+N+2 construction adds two build-up layers on each side and requires additional sequential-lamination operations.

Typical preliminary parameters may include:

Parameter	Conventional PCB	Advanced HDI PCB
Line/space	100/100–150/150 μm	50/50–75/75 μm
Mechanical drill	0.20–0.30 mm	As required by the structure
Laser microvia	Generally not required	Approximately 75–150 μm
Outer copper	Commonly 18–35 μm	Selected for fine-feature capability
Stack-up	Standard multilayer	1+N+1, 2+N+2, or more complex
Impedance	Defined by interface	Defined by interface and transition geometry

These are engineering starting points, not guaranteed fabrication capabilities. The minimum geometry must be qualified for the actual material, copper thickness, board construction, and production volume.

Component Placement and Routing

Component placement should follow electrical signal flow and mechanical constraints.

Place connectors according to enclosure requirements.
Position decoupling capacitors close to power pins.
Minimize switching-current loop area.
Separate sensitive analog circuitry from noisy power stages where appropriate.
Reserve test-point access and assembly clearances.
Keep high-speed routing over suitable reference planes.

A nominal 50 Ω single-ended trace or 100 Ω differential pair requires stack-up-specific geometry. The required impedance comes from the interface specification, not from the software's default settings.

Copper zones should be checked for isolated islands, narrow connections, and unintended reference-plane gaps. Differential-pair length matching must follow the actual interface timing budget rather than an arbitrary universal tolerance.

Design Rule Check (DRC)

DRC verifies the PCB against the active constraint set. It can identify clearance violations, unrouted nets, drill-rule conflicts, component courtyard overlaps, and other physical errors.

Before manufacturing release:

Run DRC with the final rule set.
Resolve unintended clearance and connectivity violations.
Review differential-pair and length constraints.
Confirm copper-to-edge and hole-to-copper requirements.
Inspect component and mechanical clearances in 3D.
Document approved exceptions.

A clean DRC report confirms compliance with configured rules, not compliance with every fabrication or assembly requirement.

Manufacturing Output

Generate fabrication and assembly outputs from the approved revision.

The release package should include copper layers, solder-mask layers, silkscreen, board outline, drill files, stack-up, material requirements, surface finish, impedance notes, BOM, and component placement files.

For printed circuit assembly, the BOM should specify approved components and alternatives. Placement data must match the footprint orientation and board origin used by the assembly manufacturer.

For controlled-impedance or HDI designs, request a DFM review before production tooling begins.

Manufacturing and Factory Case

Custom PCB Manufacturing

A custom PCB design must be converted into a process that the selected fabrication facility can manufacture repeatedly.

The PCB manufacturing sequence generally includes:

CAM review and fabrication data preparation.
Inner-layer imaging, etching, and automated optical inspection.
Multilayer lamination under a qualified temperature and pressure cycle.
Mechanical drilling and laser drilling where specified.
Desmear, copper deposition, and electroplating.
Outer-layer imaging and etching.
Solder-mask application and surface finishing.
Profiling, electrical testing, and final inspection.

For HDI production, sequential lamination introduces additional registration, dielectric-thickness, and microvia-plating controls. A laser microvia with a 100 μm diameter and 75 μm dielectric depth has a depth-to-diameter ratio of 0.75:1, but its suitability still depends on the qualified drilling and plating process.

Printed Circuit Assembly

Printed circuit assembly converts the fabricated board into an electronic assembly through solder paste printing, component placement, soldering, inspection, and testing.

Typical SMT process controls include:

Stencil thickness around 0.10–0.15 mm for many conventional assemblies, adjusted for component geometry.
Solder paste inspection to verify deposition position and volume.
Pick-and-place verification against the approved BOM and centroid data.
Reflow profiling according to the solder paste and component specifications.
AOI and X-ray inspection for applicable visible and hidden solder joints.
In-circuit or functional testing according to the product requirements.

For SAC305 solder paste, peak reflow temperatures are commonly around 235–250°C, subject to the approved solder paste profile and component temperature limits.

Choosing a PCB Board Manufacturer

A PCB board manufacturer should be selected according to its documented capabilities, not only its quoted price.

Hemeixin Electronics may be evaluated for custom PCB fabrication, HDI PCB prototypes, and associated assembly requirements, subject to confirmation of its current production capabilities.

A technical sourcing review should verify:

Supported layer counts and stack-up constructions.
Minimum trace width, spacing, and finished-hole dimensions.
Microvia and sequential-lamination capability.
Controlled-impedance manufacturing and testing.
Material availability and approved substitutions.
Inspection standards, traceability, and production documentation.
Assembly services and test coverage.

The manufacturer should review the actual design files before confirming manufacturability. A general capability statement does not establish that every requested combination of features can be produced together.

Representative Six-Layer HDI Case

The following case is an illustrative engineering scenario using representative production parameters. It is not presented as a verified customer manufacturing record.

A six-layer industrial communication board is designed with a 1+4+1 HDI structure, a nominal 1.2 mm finished thickness, 75/75 μm minimum line/space, and 100 μm laser microvias.

The board contains a 0.5 mm-pitch BGA, controlled-impedance communication signals, and several power-conversion components.

During manufacturing review, three issues are identified:

A microvia landing pad has insufficient registration allowance.
A high-speed signal crosses a discontinuity in its reference plane.
The component layout restricts solder paste inspection and rework access near the BGA.

The engineering team revises the microvia pad geometry, restores the reference-plane continuity, and adjusts component spacing. The revised design is checked against the manufacturer's drilling, registration, solder-mask, and assembly capabilities.

The release process requires DRC verification, CAM review, impedance-coupon planning, electrical testing, and assembly inspection.

The engineering result is a design with the identified conflicts resolved before fabrication. Actual yield improvement, cost reduction, and electrical performance must be established through measured production data rather than estimated percentages.

Common PCB Design Errors

Incomplete Manufacturing Rules

Using default trace widths, clearances, or drill dimensions without checking the fabricator's process can cause CAM holds or redesigns. Manufacturing rules must be approved before detailed routing.

Incorrect Component Footprints

A footprint with incorrect pad pitch, pin numbering, or thermal-pad geometry can create systematic assembly failures. Compare critical dimensions against the component manufacturer's datasheet.

Poor Return-Path Planning

A high-speed trace crossing a split reference plane can create an impedance discontinuity and increased electromagnetic interference. Review the complete signal and return-current path.

Unqualified Microvia Structures

Stacked or unusually small microvias require appropriate drilling, plating, filling, and reliability controls. Confirm the manufacturer's qualified construction before finalizing the HDI architecture.

Incomplete Assembly Documentation

Missing component rotations, approved part numbers, solder paste requirements, or test instructions can delay printed circuit assembly. The fabrication and assembly packages must share the same approved revision.

Missing Quality Requirements

Define the applicable standards and acceptance class before manufacturing.

Relevant documents include:

IPC-2221: Generic printed-board design requirements.
IPC-2222: Rigid organic printed-board design.
IPC-2226: HDI printed-board design.
IPC-6012: Rigid printed-board qualification and performance.
IPC-6016: HDI printed-board qualification and performance.
IPC-A-600: Bare-board acceptability.
IPC-A-610: Electronic assembly acceptability.
J-STD-001: Soldered assembly requirements.

The inspection plan should include electrical continuity and isolation, dimensional verification, microsection analysis where required, impedance testing for specified nets, and appropriate assembly inspection and functional testing.

Frequently Asked Questions

Q1. Is Altium Designer free to use?

Altium Designer is commercial software and generally requires a paid license or subscription. Trial, educational, or other limited-access arrangements may be available under the vendor's current terms. Engineers should verify eligibility and permitted use before selecting a license.

Q2. Is Altium Designer discontinued?

Altium Designer is an established commercial PCB design product and has not been identified here as discontinued. For current release availability, maintenance arrangements, and supported versions, consult the official product documentation and licensing information.

Q3. Which is better, KiCad or Altium?

Both can support professional PCB design. KiCad is free and open source, making it attractive for cost-sensitive development and teams that prefer an open software ecosystem. Altium Designer offers a commercial integrated environment with collaboration, component-data management, and advanced PCB design workflows. The better choice depends on project complexity, team requirements, budget, and support needs.

Q4. How much does Altium Designer cost?

Altium Designer pricing depends on the licensing model, subscription term, region, available features, and commercial agreement. A single fixed price should not be assumed without a current vendor quotation. Teams should compare the total licensing cost with their requirements for collaboration, support, library management, and manufacturing documentation.

Conclusion

Altium Designer provides an integrated workflow for schematic capture, simulation, PCB layout, routing, verification, and manufacturing documentation. Its engineering value comes from connecting electrical design decisions with physical board constraints and production requirements.

For custom PCB manufacturing and HDI PCB prototypes, the most reliable approach is to establish the stack-up and fabrication limits early, validate component libraries, apply accurate design rules, and complete manufacturing and assembly reviews before release. Software verification, factory DFM, inspection, and functional testing must work together to deliver a production-ready electronic assembly.