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[zoewang11]

📦 Does your PCBA require custom packaging? Some customers have specific requirements for shipping packaging—blister packs, custom foam, die-cut cardboard boxes… Just send us your requirements, and we'll execute according to your specifications.

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When AOI says no, the engineer says wait!!

The board didn't pass AOI. Instead of flagging it and moving on, the engineer pulled it to the rework station.

SMT lines run fast. But some defects need eyes and hands before they ever reach the customer.

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On May 16, leaders from Shaoyang University — the alma mater of our CEO, Frank — visited STHL for guidance and exchange.

It was more than just an industry-academia meeting. It was a moment to look back at where it all started.

We shared with our honored guests how STHL has grown, our production capabilities, and our journey in the PCBA industry.

We are truly grateful for their encouragement and professional guidance, and for the education that shaped our foundation. No matter how far we go, we never forget where we began.

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Unseen Solder Joints, See Them Clearly with X-Ray

Solder balls on the bottom of BGAs, solder run-through on the sides of QFNs, tiny voids and cracks—these details invisible to the naked eye are revealed one by one by STHL using X-Ray.

Not every board needs it, but when it does, it never overlooks any potential problems.

[zoewang11]

STHL Workshop Daily Life | Every Moment Adds to Reliability

This is our workshop, at its most authentic.

Machines run non-stop, workers are focused and organized, and boards flow silently between production lines. —Every position, in its own way, is writing a footnote to today's quality commitment.

Moments Captured by the Camera Today

Preparation for surface mount line changeover, materials are being neatly shelved.

Colleagues are checking data at the first article inspection machine.

In the repair area, details are being re-examined and reinforced.

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From the SMT workshop to the manual DIP insertion, the camera pans across every corner of the factory, recording not only the operation of the equipment, but also our daily commitment to "reliability."

We believe: True manufacturing lies in every meticulously handled detail.

From the starting point to the finish line of a circuit board, our unwavering respect for quality remains constant.

[zoewang11]

In STHL's SMT workshop, reflow soldering is not just a process step, but a core technology determining soldering reliability. We use precise temperature control to ensure every solder joint reaches a perfect state.

2 x 10-zone reflow ovens + 1 x 8-zone reflow oven

Supports soldering needs from simple single-sided boards to complex HDI boards

Optional nitrogen process, oxygen concentration < 1000ppm

Oxidation rate reduced by 90%, resulting in bright and full solder joints

Stable temperature rise, safe solvent evaporation

Fluoride activation, oxide removal

Precise temperature control, achieving perfect eutectic bonding

Optimized solidification structure, improved solder joint strength

► Lateral Temperature Difference < ± 2℃

► Supports lead-free/lead-containing process switching

► Real-time temperature profile monitoring and traceability

BGA void rate controlled below 8%

Soldering defect rate reduced by 35%

Supports automotive electronics-grade reliability requirements

We ensure that the temperature profile of every board is a testament to quality

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In STHL's SMT workshop, the loading area is the core hub ensuring efficient production. The neatly arranged feeders here are not only material carriers but also our precision arsenal for rapid line changeovers.

Intelligent Feeder Area Working Logic

✅ Pre-loading System

The trays of materials for projects about to go into production are pre-loaded into the feeders.

A unique project ID tag is generated, achieving precise material matching.

✅ Rapid Line Changeover Mechanism

The entire feeder rack is replaced directly during production line changes.

STHL Feeder Area Core Values

► Increased Capacity: Utilizing production gaps for material preparation, increasing equipment uptime by 35%.

► Zero Error Rate: Eliminating the risk of incorrect materials through dual barcode verification.

► Flexible Response: Supporting parallel material preparation for up to three urgent order insertion projects.

We make production flow as smooth as a symphony.

At STHL, the precise positioning of each feeder is a solemn commitment to customer delivery deadlines.

[zoewang11]

How to apply conformal coating and what is the function of applying conformal coating? Let's take a look at the following video！

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There is our DIP workshop.

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There is our SMD workshop,We have 5 SMT high-speed production lines, 2 DIP production lines, 2 functional testing production lines, and 2 finished product assembly lines.

[zoewang11]

hi,I'm zoe,a sales engineer in the Shenzhen STHL Electronics Co.,Ltd.we are a professional PCB & PCBA manufacturing servicer with more than 18 years of experience located in Shenzhen, China. Mainly provide services of electronic components sourcing + PCB fabrication + PCB Assembly + Housing assembly + Function testing services.

Our factory covers 7000+ square meters, has 5 (Panasonic) high-speed SMT production lines, 2 DIP lines, 2 testing lines, and 180+ workers, passed ISO9001, ISO14001, ISO13485 and IATF 16949 certifications, win recognization by Littelfuse, Hisense,Surfilter, etc.