Fine-Pitch Printed Circuit Board Assembly Services IPC-A-610 Class 3 Compliant Under One Roof

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Know About PCBONLINE PCB Assembly Services

  • PCBONLINE provides one-stop PCB assembly services for aerospace, defense, medical, industrial, automotive, communications, and consumer electronics. From PCB prototype assembly to batch PCBA manufacturing, component procurement, and end-product assembly, all in one-stop solution is offered. PCBONLINE has 0.35mm finest pitch assembly and 01005 SMD assembly capabilities.
  • PCBONLINE PCB assembly services strictly follow IPC-A-610 Class 3 standards and offer the highest cost-effectiveness. Since 1999, PCBONLINE has been dedicated to providing PCB assembly services to clients around the globe with the highest quality in the fastest delivery.

About PCB Assembly Services

Strengths of PCB Assembly Services at PCBONLINE

  • • Have 30 mature SMT and THT lines equipped with Panasonic and Yamaha SMT machines, 3D SPI, X-ray, lead-free reflow soldering ovens, 3D AOI, German Ersa selective wave soldering machines, etc.
  • • ≤0.5mm fine pitch assembly, Min component size 01005 (0.4mm×0.2mm), Min board size 50mm×50mm, Max board size 1200mm×370mm, PCB thickness 0.3mm to 4mm.
  • • Solutions experts provide free one-on-one engineering support and considerate services (DFX).
  • • Provide free complete PCBA samples, functional testing, and discounts to ≥$5,000 orders.
  • • IPC-A-610 Class 3 quality and ISO quality management system. You can refer to our PCB assembly manufacturing level from the image on the right.
  • • Source passive and active components for PCB assembly at bulk pricing from reliable electrical part suppliers and has its own component warehouse.
  • • Have rich PCBA manufacturing experience, especially for complex PCB assembly such as thermal pads, vias-in-pad, fine-pitch BGAs, right angles at pads, etc.
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Explore Prototype PCB Assembly Services - Process and Tech Specs


SMT Assembly and THT Assembly

Here are two major PCB assembly techniques.

  • 1. SMT (surface-mount technology): using an SMT stencil, the soldering paste is applied on the PCB to achieve the desired design, and the components are mounted or placed directly onto the surface of printed circuit boards.
  • 2. THT (through-hole technology): a hole is drilled through the PCB, and then a component is placed over it on one side while wave soldering is applied on the other side.

Preparation for PCB Assembly

For PCB assembly, consumables and electronics parts as below are required:

  • 1. Bare printed circuit boards
  • 2. Primary electronic components
  • 3. Depending on the type of the process of soldering, soldering components like solder balls, solder paste, solder bar, solder perform are required.
  • 4. Flux for quote soldering
  • 5. Assembly lines including reflow soldering machine, wave soldering machine, soldering station, SMT tools, testing/ inspection equipment, etc.
  • When the above things are provided, the PCB assembly process can start.

Process of PCB Assembly Services

Prototype PCB assembly is a non-linear process as quote concerns are involved. The procedure consists of basic steps as below.

  • Step 1. PCB design and output
  • Step 2. PCB assembly house check Gerber files and BOM
  • Step 3. PCB assembly house sources components for assembly
  • Step 4. PCB and SMT stencil manufacturing
  • Step 5. PCB assembly (SMT + PTH)
  • Step 6. Functional testing, four-terminal sensing, conformal coating
  • Step 7. End-product assembly and delivery
  • Before PCB assembly, PCBONLINE inspects all components.

Fine-Pitch Assembly Capability

  • • 23,500CPH chip (Laser centering/Optimum) and 18,500CPH (Laser centering / IPC9850).
  • • IC9,000CPH (Vision centering / MNVC option).
  • • From 0402(01005) to 33.5mm square components.
  • • The use of electronic double tape feeders enables the mounting of a maximum of 160 component types.
  • • High-speed, on-the-fly vision centering (when using both high-resolution camera and MNVC).
  • • Longer sized PWB in X-axis.

Tech Specifications

Part of the assembly capabilities of PCBONLINE's PCB assembly fab is below.

Our PCB Service for You


One-Stop PCB Manufacturing


Quick Manufacturing and Delivery


Custom PCB Design & Assembly


21 Years of Experience


PCB Assembly Services with Quick Turnaround from Prototype PCB Assembly to Mass PCBA Manufacturing