PCB Manufacturing & Assembly FAQ: What, Why & How

We provide quotation and engineering review promptly after we receive your Gerber files (excluding weekends). Complex HDI or turnkey PCBA projects with long BOMs may take slightly longer — we will tell you upfront if that is the case.

We support prototype, pilot, and production requirements. Feasibility and the appropriate manufacturing route are confirmed after project review.

For bare PCB: Gerber files (RS-274X preferred) or ODB++, plus a drill file and any stackup or impedance requirements. For PCBA: add your BOM and Pick & Place file. We accept ZIP, RAR, PDF, XLS, and standard CAD outputs.

Yes. NDA is available upon request. All design files are handled under strict confidentiality procedures regardless of whether an NDA is in place.

No — and this is deliberate. Custom PCB and PCBA pricing depends on stackup, process complexity, and real-time component availability. Every quote is reviewed by an engineer, which is why our quotes hold up in production instead of being revised after you place the order.

Send the latest Gerber or ODB++ files, drill data, quantity, material and finish requirements, target date and destination. For a prototype PCBA quote, also include the BOM, Pick & Place file, assembly drawing and test requirements.

A quotation can change when file review identifies a different stackup, material, copper weight, panelization, test scope, component source or delivery assumption. We document those changes before production approval.

Send them with the first PCBA inquiry whenever possible. Early review of reference designators, footprints, package types, rotations, polarity marks and assembly notes reduces clarification cycles before the quotation.

Use one revision-controlled project archive and label each file clearly. Include a README with the board revision, quantity, material, finish, stackup, impedance, assembly side, testing and open questions so the quote uses the same baseline.

Layer count and construction are reviewed against the released design, material availability, quantity and required evidence before quotation.

Trace width and spacing depend on the board construction, copper, material, layer count and production route. Confirm the proposed limits during engineering review.

Impedance capability depends on the material, stackup, copper geometry, thickness control and acceptance requirement. Confirm the target and calculation method during engineering review.

Mechanical and laser via limits depend on the stackup, material, aspect ratio, via structure, quantity and production route. Confirm the proposed limits against the released design.

Material selection depends on electrical, thermal, mechanical and availability requirements. Confirm the approved laminate, board thickness and copper construction during engineering review.

HASL, Lead-Free HASL, OSP, ENIG, Immersion Silver, Immersion Tin, ENEPIG, Hard Gold, Gold Finger and selective finishes.

A PCB is the bare fabricated board with copper traces, pads and vias. A PCBA is that board after components are placed and soldered. Choose fabrication when you need bare boards and assembly when you need a functional electronic assembly.

The normal flow includes engineering and DFM review, material and stackup confirmation, imaging and etching, lamination, drilling, plating, solder mask, surface finish, electrical testing and final inspection. The exact route depends on the board technology.

A multilayer PCB uses more than two copper layers separated by dielectric material. It is useful when routing density, power distribution, controlled impedance, signal integrity or EMC requirements cannot be met on a simpler stackup.

Match the material to temperature, frequency, mechanical movement, dielectric performance, reliability and budget. FR-4 suits many rigid boards; high-Tg supports higher thermal margins; Rogers and similar materials serve RF needs; flexible materials suit bendable interconnects. Confirm the material and stackup during engineering review.

Controlled impedance helps high-speed signals reach the receiver with predictable rise time, loss and reflection. The target depends on the interface and is verified against the proposed stackup, trace geometry, dielectric and copper construction.

Consider HDI when routing density, fine-pitch escape, smaller form factor or sequential interconnects require more capability than a conventional multilayer board. The need is confirmed against layer count, via structure, line and space, material and production quantity.

Placement feasibility depends on package geometry, land pattern, board design, component condition, process route and inspection requirements. Confirm the proposed limits during engineering review.

BGA, QFP and QFN feasibility depends on package geometry, pad design, stencil strategy, assembly process and inspection access. Confirm the proposed route against the released data.

Assembly size, thickness and component-height limits depend on the selected production route, panelization, fixtures and handling requirements. Confirm them during engineering review.

Component sourcing, incoming inspection, approved alternates and traceability are agreed for each project based on the BOM, risk and customer requirements.

Reflow atmosphere and process controls are selected according to package sensitivity, soldering requirements and the agreed process plan.

In turnkey PCBA, the manufacturer sources components and manages fabrication, assembly and agreed testing. In consigned assembly, the customer supplies the components and the manufacturer assembles them. Partial turnkey combines both models for a project-specific sourcing plan.

SMT places components on surface pads and uses solder-paste printing and reflow. Through-hole assembly inserts leads through plated holes and uses wave, selective or hand soldering. Many production boards combine both methods based on package and mechanical requirements.

Their solder joints are partly or fully hidden under the package, so visual inspection alone cannot verify every connection. SPI, AOI, X-ray or electrical test may be combined according to package geometry, process risk and the agreed acceptance plan.

Include manufacturer part numbers, approved alternates, quantities, reference designators, package information and revision status in the BOM. Pick & Place data should identify X/Y coordinates, rotation, side and board origin; the assembly drawing should clarify polarity, no-fit items and special instructions.

Lead time is reviewed against the production files, process complexity, order quantity, and component availability, then confirmed with the quotation.

HDI lead time depends on the stackup, number of sequential lamination cycles, material availability, testing scope, and quantity. We confirm the schedule after reviewing your files.

Share your required date with the project files. Our team will review material and production availability and confirm what is feasible before quotation.

There is no responsible one-size-fits-all schedule. The confirmed lead time depends on technology, material, quantity, component availability, testing, queue and shipping requirements, and is stated after file review.

Prototype timing depends on complete files, material availability, board complexity, layer count, finish, quantity, engineering questions and the production queue. A quick-turn request is reviewed against those conditions rather than treated as a blanket promise.

A single long-lead or obsolete component can hold a build or require an approved alternate. Confirm lifecycle, source, date code, substitutions and customer-approval rules before the production BOM is released.

Send a complete revision-controlled package, identify approved alternates, freeze the BOM early, answer DFM questions quickly, define the test plan and confirm packaging and shipping requirements before the order is released.

Inspection and testing are selected from the product risk, component package, test access, quantity and acceptance requirements. The agreed plan may include process inspection, visual or X-ray review, electrical test or functional test where appropriate.

ISO 9001, ISO 14001, IATF 16949, UL, RoHS, REACH, IPC-A-600, IPC-A-610, and we build to IPC Class 2 or Class 3 depending on project requirements.

Engineering review can cover released fabrication data, BOM, materials, stackup, controlled impedance, routing, via structure, assembly drawings and testing requirements before production approval. The review scope is confirmed with the quotation.

Yes. We build to IPC Class 2 or Class 3 based on your project requirements, and inspect to IPC-A-600 (bare board) and IPC-A-610 (assembly) standards.

SPI checks solder-paste deposition, AOI checks visible placement and solder features, X-ray checks hidden joints and voids, ICT checks electrical nets and FCT checks product-level function. A risk-based plan may combine several methods.

Choose the class with your product risk, operating environment, service-life expectation and customer acceptance requirements. Class 3 is typically selected when consistent high-reliability performance and tighter acceptance criteria justify the additional controls.

Incoming inspection helps identify component, quantity and packaging issues before placement. Traceability connects component lots, process records, inspection results and finished panels so a nonconformance can be isolated and reviewed.

Use ICT when a stable fixture and netlist coverage justify it, flying probe when quantities or design changes make a fixture less practical, and functional test when the assembled product must be exercised at system level. The final plan follows access, volume, risk and acceptance criteria.