Custom 2-Layer PCB Fabrication
Double-Sided PCB Manufacturing
Custom 2-layer bare PCBs for prototype and production orders. PCBELEC manufactures double-sided boards with plated-through interconnections, specified materials, copper thicknesses and surface finishes.
Send your fabrication files to sales@pcbelec.com
- Circuit Structure Top & Bottom Copper
- Layer Connections Plated-Through Holes
- Manufacturing Orders Prototypes to Production
Double-Sided = Two Copper Layers
What Is a Double-Sided PCB?
A double-sided PCB, also called a double-layer or 2-layer PCB, has copper circuitry on both sides of an insulating substrate. Plated-through holes connect the top and bottom circuits wherever the design requires an electrical connection.
In a conventional rigid FR-4 board, the two copper layers sit on opposite faces of the FR-4 core. This gives the design a second routing surface without adding internal circuit layers.
Copper Layers Are Not Component Sides
“Double-sided PCB” describes the bare board’s two conductive layers. Components may be mounted on one side or both sides; that is a separate assembly-layout decision.
Rigid 2-Layer Construction
Two Routing Surfaces
Route circuit connections on the top and bottom layers to use the available board area more effectively.
Layer-to-Layer Connections
Use plated vias and component holes to connect designated copper features across the substrate.
Custom Board Features
Specify materials, copper, holes, surface finish and mechanical details for your manufactured board.
2-Layer Stackup & Interconnections
Two Copper Layers Connected by Plated-Through Holes
The insulating core separates the two copper layers. Copper plating on a through-hole wall creates an electrical path between designated top and bottom pads. A drilled hole without conductive plating does not provide that connection.
Conventional Rigid FR-4 Board / Simplified Cross-Section
Plated-Through Holes
PTH features use copper on the hole wall to connect top and bottom pads. They include interlayer vias and plated holes for through-hole component leads.
Non-Plated Holes
NPTH features have no conductive hole-wall plating. They are commonly specified for mounting, alignment or other mechanical functions, with copper clearance defined by the design.
Mask, Finish & Legend
Solder mask protects selected circuit areas, surface finish covers exposed pads, and legend provides markings. These features do not add extra routing layers to the 2-layer board.
Custom Construction & Fabrication
Double-Sided PCB Manufacturing Capabilities
PCBELEC manufactures custom 2-layer boards with specified materials, circuit copper, plated holes, surface finishes and mechanical features. Define the construction around your circuit and product requirements.
Swipe horizontally to view all manufacturing options.
| Manufacturing Feature | Fabrication Capability |
|---|---|
| Conductive Layers | Two copper circuit layers: top and bottom, connected by specified plated-through features. |
| Rigid Materials | FR-4, high-Tg FR-4 and specified high-frequency laminate systems. Explore PCB material options . |
| Flexible Construction | Double-sided polyimide circuits with coverlay, stiffeners and defined connection regions. See double-sided flex PCB manufacturing. |
| Board Geometry & Thickness | Custom board dimensions, finished thickness, internal cutouts and mounting features manufactured to the fabrication drawing. |
| Circuit Copper | Specified top- and bottom-layer copper thicknesses, including heavy-copper construction for substantial conductive paths. |
| Circuit Patterns | Top and bottom routing, copper areas, pads and clearances defined by the fabrication data. |
| Holes & Slots | Plated-through vias and component holes, non-plated mounting holes, plated slots and non-plated slots. |
| Controlled Impedance | Controlled-impedance fabrication with defined targets, tolerances, reference structures and verification requirements. |
| Surface Finish | ENIG, HASL, OSP, immersion silver and immersion tin. |
| Solder Mask & Markings | Specified solder mask colors, pad openings, legend and board identification. |
| Panel & Delivery Format | Individual boards or manufacturing panels, with routed profiles, tabs or V-scoring defined in the panel drawing. |
| Inspection & Records | Circuit inspection, electrical verification, dimensional checks and microsection reporting. |
Choose the Substrate for Your 2-Layer Circuit
Double-Sided FR-4 PCB
A rigid insulating core supports the top and bottom circuits. Specify the laminate grade, finished thickness, copper, holes and surface finish in the manufacturing package.
Double-Sided Flexible PCB
A flexible dielectric supports two copper layers. Define coverlay openings, stiffeners, connection regions and bend conditions alongside the circuit construction.
Compare Circuit-Layer Options
Single-Sided vs. Double-Sided vs. 4-Layer PCB
Choose the layer structure around routing density, reference paths, electrical requirements and board space. More copper layers provide additional layout options; the right choice starts with the circuit and its constraints.
Swipe horizontally to compare all three constructions.
| Selection Factor | Single-Sided PCB One conductive layer | Double-Sided PCB Two conductive layers | 4-Layer PCB Four conductive layers |
|---|---|---|---|
| Copper Structure | Circuit copper on one side of the substrate. | Circuit copper on the top and bottom of the substrate. | Two external copper layers and two internal copper layers. |
| Routing Space | Routing is concentrated on one conductive surface. | Connections can move between two routing surfaces through plated holes. | Additional layers provide more options for signals, power and reference planes. |
| Layer Connections | No interlayer electrical connections are needed within a one-layer construction. | Plated-through holes connect designated top and bottom copper features. | Plated interconnects connect the layers specified in the stackup and drill structure. |
| Ground & Power Layout | Ground, power and signals share the available circuit surface. | Copper pours or layer areas can provide ground and power paths alongside routing. | Internal layers can be assigned to ground and power reference planes. |
| Signal & EMI Planning | Limited routing and reference-path options place greater constraints on the layout. | Return-path continuity and routing crossings require deliberate planning. | Dedicated reference layers provide additional control over return paths and signal-layer relationships. |
| Fabrication Structure | One patterned copper layer with the specified finish and mechanical features. | Two patterned copper layers plus plated-through connections. | Internal-layer patterning, multilayer lamination and specified interconnections. |
| Evaluate This Option When | The required connections fit a single-layer routing arrangement. | Two routing surfaces meet the circuit, board-area and electrical requirements. | Routing density, reference planes or electrical constraints justify additional conductive layers. |
Choosing a 2-Layer Board
When Is a Double-Sided PCB a Good Fit?
Choose a double-sided construction when the connections, copper areas and reference paths can be organized across two layers within the required board outline. Specify the copper, holes and material system together with the layout.
Review Double-Sided Fabrication OptionsMoving to More Layers
When Should You Consider a 4-Layer PCB?
Consider four layers when routing congestion, dedicated reference planes or impedance and EMI requirements call for more layout control. Evaluate the complete stackup rather than selecting layer count from signal frequency alone.
Explore Multilayer PCB ManufacturingEngineering Samples to Repeat Orders
Double-Sided PCB Prototypes and Production
PCBELEC manufactures custom 2-layer boards for development, pilot builds and production. Keep your board revision, construction and delivery requirements aligned as your project moves from one build to the next.
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01 / DEVELOPMENT BUILDS
Double-Sided PCB Prototypes
Manufacture initial and revised 2-layer boards for your engineering evaluation, using the specified substrate, copper, holes and finished-board geometry.
- Initial designs and board revisions
- Defined materials, copper and finish
- Evaluation quantities and delivery needs
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02 / PILOT & SMALL-BATCH ORDERS
Low-Volume 2-Layer PCBs
Order double-sided boards for pilot runs, early production and ongoing small-batch requirements, with the board or panel format defined for your next manufacturing stage.
- Pilot builds and small production batches
- Individual-board or panel delivery
- Specified inspection and reporting
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03 / PRODUCTION MANUFACTURING
Production & Repeat Builds
Manufacture released double-sided board designs for production orders, with consistent construction specifications and records connected to the required revision.
- Released designs and repeat orders
- Material and construction consistency
- Quantity and delivery planning
From Fabrication Data to Verified Boards
Fabrication, Testing and Quality Records
Double-sided PCB manufacturing brings together two patterned copper layers, plated interconnections and finished mechanical features. PCBELEC combines fabrication with circuit, electrical and structural verification.
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01 / ENGINEERING PREPARATION
Files & Build Definition
Review the circuit data, drill information, materials, copper, board geometry and released revision to prepare the manufacturing package.
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02 / CIRCUITS & INTERCONNECTIONS
Drilling, Plating & Patterning
Drill the specified holes, form conductive hole walls and produce the top and bottom copper circuitry through the selected fabrication sequence.
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03 / FINISHED FEATURES
Mask, Finish & Profiling
Apply solder mask, markings and the specified surface finish, then form the board outline and separation features.
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04 / VERIFICATION & DELIVERY
Inspect, Test & Package
Verify the manufactured features, prepare the order records and package the finished boards for delivery.
Quality Checks for the Manufactured Board
Circuit & Surface Inspection
Optical and visual inspection examine circuit patterns, solder mask, legend, exposed pads and visible surface features.
Electrical Verification
Electrical testing checks continuity and isolation in the circuit network. Specified impedance structures receive the required verification.
Dimensions & Cross-Sections
Dimensional checks examine the outline, thickness and holes. Microsections reveal plated-hole and construction features.
Custom 2-Layer Board Quotation
Request a Double-Sided PCB Quote
Get a manufacturing quotation for your next 2-layer board. Send your fabrication files, construction details and quantity to PCBELEC.
What Affects the Manufacturing Price?
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Board dimensions, quantity and manufacturing panel layout.
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Substrate, finished thickness and top- and bottom-layer copper.
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Line geometry, hole sizes, plated slots and mechanical complexity.
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Surface finish, impedance requirements and inspection records.
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Delivery format, packaging, requested schedule and destination.
Include These Details with Your Inquiry
Manufacturing File RequirementsFiles & Revision
Top and bottom copper, solder mask, legend, board profile, drill data and fabrication drawing.
Materials & Copper
Substrate grade, finished board thickness and copper thickness for both conductive layers.
Holes & Mechanics
PTH and NPTH designations, finished hole sizes, slots, critical dimensions and panel format.
Finish & Markings
Surface finish, solder mask, legend and board identification requirements.
Verification & Records
Acceptance criteria, impedance targets, inspection requirements and requested reports.
Quantity & Delivery
Order quantity, individual-board or panel delivery, packaging, destination and required date.
2-Layer PCB Questions
Double-Sided PCB Manufacturing FAQ
Answers about two-layer construction, plated holes, material choices, fabrication services and quotation requirements.
Discuss your next double-sided board:
sales@pcbelec.comIs a double-sided PCB the same as a 2-layer PCB?
Yes. In this context, double-sided, double-layer and 2-layer PCB describe a board with two conductive copper layers: one on the top and one on the bottom. Solder mask and legend do not count as additional circuit layers.
See the construction overview for a simplified layer illustration.
How are the top and bottom copper layers connected?
Plated-through holes create conductive paths between designated top and bottom pads. Copper on the hole wall forms the connection through the substrate. A non-plated hole does not provide this conductive path.
Explore the PTH and NPTH cross-section for the structural difference.
Can a double-sided PCB also be flexible?
Yes. Two copper layers can be built on a flexible substrate rather than rigid FR-4. Flexible constructions include coverlay and defined connection regions, with stiffeners and bend requirements specified for the design.
Explore our double-sided flexible PCB manufacturing service.
Can a 2-layer PCB support controlled impedance?
Yes. A 2-layer design can include controlled-impedance structures. The target depends on the material, dielectric thickness, trace geometry, copper and reference arrangement.
Include the targets, tolerances and reference structures in the fabrication package. Compare 2-layer and 4-layer construction when planning reference paths and routing.
Does a double-sided PCB require components on both sides?
No. Double-sided PCB describes the two copper circuit layers of the bare board. Components can be placed on one side or both sides according to the assembly layout.
This page covers bare-board fabrication. For assembly services, use the PCBJHY link in the site footer.
Do you support prototypes and production orders?
Yes. PCBELEC manufactures double-sided boards for prototype evaluation, pilot runs, low-volume orders and production. Each order identifies the board revision, construction, quantity and delivery needs.
Explore our prototype and production options, including the quick-turn service.
What affects the price of a double-sided PCB?
Price reflects board dimensions, quantity, materials, copper thickness, hole and line geometry, surface finish, panel format and special processing. Inspection records and delivery requirements also contribute to the quote.
Submit your files and specifications to request a manufacturing quotation.
Which files should I send for a quotation?
Send Gerber files for the copper, solder mask, legend and profile, together with drill data and a fabrication drawing. Specify the board revision, materials, thickness, copper, finish and quantity.
Include critical tolerances, PTH and NPTH details, panel requirements and the delivery date. Review our manufacturing file requirements before submitting the package.