What is SMT PCB Assembly?

SMT, the full name is surface mount technology. SMT is a way to mount the components or parts onto the printed circuit board (PCB). Due to the better outcome and higher efficiency, SMT has become the primary approach used in the process of PCB assembly.

SMT PCB Assembly Capabilities

PCBANow has 8 SMT PCB assembly lines, fully equipped for manufacturing various PCBAs. High mix SMT assembly, therefore, we always have a high level of flexibility, which allows us to efficiently meet all our customer requirements and deliver electronic products within deadlines.

We are proud of that our SMT PCB assembly capabilities are superior to our competitors. In PCBANow the staffs are well trained and very good at finishing excellent SMT assembly work.

Services: Turnkey/Consigned SMT

Ability: 600K Points/Hrs

Min. SMD: 01005

BGA Pitch: 0.25mm

Min. Size: 6mm×6mm

Placement Accuracy: ±0.01mm

MOQ: 1pcs

SMT PCB Assembly Devices

Our SMT PCB assembly capabilities include 01005 passive components, fine pitch BGA, press-fit connectors, PoP, etc., the followings are some common parts we’re capable of:

Ball Grid Array (BGA)

Ultra-Fine Ball Grid Array (uBGA)

Quad Flat Pack No-Lead (QFN)

Quad Flat Package (QFP)

Small Outline Integrated Circuit (SOIC)

Plastic Leaded Chip Carrier (PLCC)

Small Chip Packages (Pitch of 0.2 mm)

SMT PCB Assembly Processing

1.Material inspection and preparation

The first step involves inspecting the PCB and electronic components, we ensure that all defects are ruled out before production, and the complete process is planned according to the work instructions.

2.Stencil & Machine programming

The high-precision steel mesh will be used in SMT placement, and the automatic placement machine and AOI inspection equipment will be debugged in the best state according to the XY file.

3.Solder paste printing

Solder paste is basically a mixture of tin and flux that we use to connect the pads to the electronic components on the PCB, sometimes red glue is attached to make sure no drop out during double-sided reflow.

4.High-speed pick and placement

We then use automated machines to pick and place PCBs, we have a capacity of nearly 1 million points per hour.


After placement, we put PCBs in a reflow oven. Reflow soldering takes place in multiple stages, each involving a specific heating zone, in which the temperature matters, and our 12-temperatures reflow ovens take care of it very well.

6.Cleaning and Inspection

We then clean the PCB and look for any possible defects, inspection includes post-reflow AOI, X-ray inspection for BGA, etc.


We use strict testing standards and a series of methods for PCBA performance testing, including reliability testing, functional testing, burn-in testing, etc., to ensure the final delivery of high-quality products.


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