Seek TECH - PCB Fabrication
PCB Fabrication at SEEK TECH: Process Excellence and Quality Assurance
For over 20 years, Seek Tech has grown from a focused PCB manufacturer into a comprehensive electronics solutions provider. Since 2005, we’ve specialized in crafting high-quality PCBs, expanding into PCB assembly in 2010 to offer end-to-end services. Our product range spans traditional PCBs, FPCs, rigid-flex boards, IC substrates, and metal-core PCBs—each built to meet the unique demands of industries from medical to automotive.​
With 700 skilled professionals operating across a 200,000 sqft facility, we combine scale with agility. Our certifications—ISO9001, IATF16949, UL, ISO14001, ISO13485, and ISO45001—underscore our commitment to quality, safety, and sustainability. What truly sets us apart? Fast turnaround times that keep pace with your deadlines, technical expertise that solves complex challenges, straightforward communication that eliminates guesswork, and rock-solid reliability that turns first-time clients into long-term partners.
Numbers Of SEEK TECH
Seek Tech specialize in the manufacturing of high-difficulty PCBS and our business covers the world.
Years Experience
Full Time Employees
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Factory Area
KSQM
Active Customers
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Expert level PCB board manufacturer
How Does SEEK TECH Fabricate PCB
By focusing on these critical processes—each backed by advanced equipment and strict quality checks—SEEK TECH delivers PCBs that perform reliably in the most demanding applications. From 35μm lines to 0.1mm vias, we turn your design into a precision-engineered foundation for success.
At SEEK TECH, we prioritize precision in every critical step of PCB fabrication. By focusing on the core processes that define board quality—drilling, lamination, plating, circuit imaging & etching，solder mask, and inspection—we ensure your PCBs meet the strictest standards for reliability and performance. Here’s how we master each stage.
Key Factors For A good PCB
- Through Hole Reliability
- Blind Via Reliability
- Plating Consistency
- Circuit Precision
- Thickness Control
- Precise Layer To Layer Registration
- Solder Mask Precision & Flatness
- Process Quality Control
Key Process
- Mechanical Drill
- Laser Drill
- Plating
- Image Pattern
- Lamination
- Solder Mask
- Inspection
Mechanical drilling：Microscopic Accuracy for Vias
Through hole reliability starts with tight control over every drilling variable. We lock down parameters—spindle speed, feed rate, and pressure—tailored to each material. FR-4 gets a steadier feed than fragile high-Tg substrates, for example. No guesswork here; our engineers update settings daily based on material batches.
Drill bits are treated like precision tools, not consumables. Each carbide drill gets a unique ID, tracked from first use to retirement. We swap them out long before wear affects quality—usually after 500 holes, even if they look fine. Dull bits cause burrs, and burrs spell trouble for plating.
Accuracy? Our drills hit ±0.03mm position tolerance, with a CPK of 1.33 or better. That means 99.9% of holes land exactly where they should.
We don’t stop at drilling. Every board gets inspected by the hole checker to prevent hole block and hole missing, and a sample board undergoes cross-section analysis. If a single hole shows uneven walls, we trace back to fix the issue—no exceptions.
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Micro Vias : Laser Ablation
We’re sharp at blind via pcb fabrication— stacked vias and skipped via. Our laser drills hit 0.1mm microvias with pinpoint accuracy, even when stacking three layers deep. No messy overlaps here; each via lines up perfectly, so signals flow without a hitch.
Desmearing is where many slip up, but we’ve nailed it. Our plasma treatment blasts away resin residue inside blind vias, leaving clean walls that bond tightly with plating. No gunk means no weak spots—critical for long-term reliability.
Blind via depression? We keep it under 5μm. By tweaking laser power and post-drill annealing, we stop the copper from sagging, ensuring a flat surface for component mounting. It’s a small detail, but it prevents solder joint issues down the line.
Filling those vias? Our electroplating hits just the right thickness—25μm minimum—so they’re fully packed without voids. Even high-current designs stay cool, no overheating risks.
And we check twice to be sure. AOI scans every via for shape and position, while HCT (High-Current Testing) pushes 10A through to spot hidden flaws. Between the two, nothing slips by. That’s how we make blind vias you can count on, day in and day out.
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Lamination (Pressing)
We take layer alignment seriously—no two ways about it. Our lamination setup uses precision cameras that lock onto fiducials with 3μm accuracy. Even when stacking 12 layers, you won’t see shifts beyond 5μm. Most shops call that overkill, but we’ve found it’s the only way to keep vias connecting cleanly, especially on dense HDI boards.
Thickness control is another area we don’t mess around with. Every batch starts with substrate checks—calipers measure each sheet, and anything off by more than 2μm gets set aside. During pressing, our presses maintain pressure within 0.1 psi, which might sound trivial until you realize it keeps the final board thickness tolerance under 5%.
What’s the payoff? Boards that play nice with circuit board assembly. Misaligned layers can throw off component placement, but ours? SMT machines glide right through. And consistent thickness means solder paste application stays spot-on. We’ve had clients say it’s like their designs finally breathe—funny, but fair.
Sure, it adds a few steps. We check alignment after each press cycle, not just at the end. Thickness is verified at three points per panel, not just one. But when you’re building boards that need to last, cutting corners here isn’t an option. We sleep better knowing that.
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Plating: Conductivity Across Layers
Our plating game starts with horizontal PTH—this isn’t just a step, it’s where we lay the groundwork. The horizontal line hits every blind via and through-hole with consistent chemistry, no shortcuts. Then VCP takes over, and honestly, that’s where the magic happens. Those vertical tanks? They keep current density steady across the board, even on tight-pitch designs.
Deep plating? We’ve got it dialed. High-aspect-ratio holes? The solution circulates like clockwork, ensuring copper creeps up evenly—no thin spots at the top, no thick blobs at the bottom. Uniformity? Our XRF checks show variance under 10%, which isn’t just good—it’s rare.
Quality? We don’t guess. Every batch gets cross-sectioned. See that copper thickness? Dead on. Adhesion tests? They never fail. And if something’s off—say, a tricky via—we tweak the parameters before it becomes a problem. It’s not overkill. It’s just how we make sure your boards last.
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Circuit Patterning: LDI + Vacuum etching for Fine Lines
We run 5um LDI systems here—sharp tools that make all the difference. They skip old-school masks, shooting laser directly onto the resist. That precision? It’s why 35/35um lines aren’t just a spec sheet claim. We hit those numbers day in, day out.
Vacuum etching is our secret weapon. No messy chemical swirls here; the vacuum keeps everything tight. So lines stay crisp, no undercutting. You’ll see it in the consistency—line width varies by less than 3um across an entire panel. Try finding that elsewhere.
AOI checks every inch after etching. The machine’s picky, flagging even tiny flaws. But honestly? It doesn’t have much to do. Our yield sits above 98% for 35/35um jobs. That’s not luck. It’s the LDI’s steady aim paired with vacuum etching’s discipline.
Thinner lines? We’re pushing boundaries there too. But let’s be clear—mastering 35/35um isn’t easy. Many talk a big game, then struggle with edge roughness. We don’t. The Xinqi gear plus our process tweaks? That’s how we keep lines sharp, consistent, and reliable. Simple as that.
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Solder Mask: LDI+Vacuum Leveling
We start with Screen LDI for solder mask—no old-school films here. This setup hits ±5μm accuracy on openings, which matters when you’re dealing with tight-pitch components. You’d be surprised how many shops struggle with misaligned masks, but our LDI system locks onto fiducials like a magnet. It’s not just about precision; it keeps the process consistent, batch after batch.
Solder Mask Opening？We’re talking 10μm tolerance, even on 0.2mm pads. That’s critical for BGA and QFP parts where a tiny shift can ruin solder joints. And yes, we test it—take a random board, measure 50 openings, and you’ll see what I mean. Most stay within 8μm, which isn’t just good for pcb fabrication; it’s peace of mind.
Solder dam is where the real craft shows. We’ve dialed in the ink viscosity and vacuum leveling so bridges as narrow as 40μm hold strong. No sagging, no breaking—even after thermal cycles. Compare that to shops where 60μm bridges start failing, and you’ll get why clients stick around.
It’s the little things, really. The LDI’s edge sharpness, the way we adjust ink flow for different board thicknesses. We don’t just meet specs; we nudge past them. Because in pcb fabrication, solder mask isn’t an afterthought—it’s the shield that keeps everything working, day in and day out. And we take that seriously.
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Inspection: AVI + ETEST for Zero Defects
We combine automated visual and electrical testing to guarantee quality:​
- AVI (Automated Visual Inspection): High-resolution cameras (5μm pixel size) check for solder mask defects, line irregularities, and silkscreen clarity. Our AVI systems flag even tiny issues, like a 10μm mask gap over a trace.​
- ETEST (Electrical Test): Flying probe testers (Teradyne) perform continuity and insulation resistance checks, covering 100% of nets on multilayer boards. They detect opens (≥1MΩ) and shorts (≤50Ω), with a test speed of 1,000 nets/minute.​
- Sample validation: For critical orders, 5% of boards undergo destructive physical analysis (DPA), including cross-sections of vias and layers to verify plating thickness and adhesion.
Why Seek Tech
Professional
We have rich PCB fabrication & PCBA experience, so the purposes and needs of the PCB design are easily reconiged by us
Service
Professional team docks with customer projects to make communication smooth and clear
Quality
Strict quality management system, complete quality testing equipment
Fast
Quick Turn PCB Fab, Mature fast delivery mechanism, not only fast, but also reliable.
Professional
Accurate Service
Quality Assurance
Fast Delivery
Time is money, Time is success!
Seek Tech provides the fastest 24 – hour PCB delivery service. We are also good at rapid PCBA delivery.
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