Build the Hardest Boards in the World
Amtech’s Wide Process Window combines vapor phase reflow and AI-driven vision inspection into a single, integrated production cell — the technology stack purpose-built to launch highly complex assemblies on the first run, with the thermal control and defect detection your hardware demands.
Vapor Phase Reflow + Vision AI
Tighter Tolerances. Higher Yields. Faster Launch.
Why Convection Reflow Holds Complex Assemblies Back
Convection ovens were built for simple boards. As assemblies get denser, taller, and more thermally diverse, the cracks show up fast:
- Thermal gradients — large copper planes, BGAs, and shielded components heat unevenly, causing tombstoning, voiding, and head-in-pillow defects.
- Oxidation risk — open-air convection requires aggressive flux and tight nitrogen control to protect sensitive joints.
- Profile development time — every new board needs hours of thermocouple work, slowing first-article launch.
- Inspection gaps — traditional AOI flags what it’s told to look for, missing the novel defects that complex, low-volume builds produce.
Wide Process Window eliminates all four — by changing the physics of how the board is heated, and by changing the intelligence of how it’s inspected.
Wide Process Window vs. Conventional Reflow
| Criteria | Convection Reflow | Nitrogen Convection | IR / Hybrid | Vapor Phase Reflow |
|---|---|---|---|---|
| Thermal Uniformity | Variable | Moderate | Variable | Exceptional |
| Max ΔT Across Board | High | Moderate | High | Near Zero |
| Oxidation Risk | High | Low | Medium | Inert by Design |
| Profile Setup Time | Hours per board | Hours per board | Hours per board | Minutes (boiling-point limited) |
| Complex Assembly Yield | Moderate | Good | Moderate | First-Pass |
| Defect Detection | Rule-based AOI | Rule-based AOI | Rule-based AOI | Vision AI (adaptive) |
| Launch Speed for New Designs | Slow | Slow | Slow | Easy Launch |
| Best For | Simple SMT | Lead-free volume | Mixed loads | Highly complex, low-to-mid volume |
How Wide Process Window Works
Wide Process Window is the integrated tech stack we built so highly complex assemblies launch cleanly the first time. Vapor phase delivers physics-perfect thermal profiles. Vision AI catches the defects rule-based AOI never sees. The result: one cell, one operator, one quality system — engineered for the boards no one else wants to build.
Our tech stack is built this way on purpose. When your assembly is dense, mixed-technology, thermally challenging, or just plain hard — we already have the process, the inspection, and the engineering team ready to launch it.
| Step | What Happens | Why It Matters to You |
|---|---|---|
| 1 | DFM & Complex-Assembly Qualification Our engineers review your BOM, stackup, and thermal mass distribution against vapor phase and Vision AI requirements before you ship a single board. |
First-article success on builds others call “unmanufacturable.” |
| 2 | Precision Paste + Placement High-accuracy printing and placement tuned for fine-pitch BGAs, 01005s, bottom-terminated components, and high-mass parts on the same board. |
The hardest density mixes handled in a single pass. |
| 3 | Vapor Phase Reflow A saturated, inert vapor blanket transfers heat by condensation — physically capped at the fluid’s boiling point. Every joint, regardless of size or location, sees the same temperature. |
No overheating, no cold joints, no oxidation. Easy launch with minimal profile development. |
| 4 | Vision AI Inspection An AI-driven inspection layer learns your assembly and flags the novel, subtle defects rule-based AOI misses — across solder, placement, and assembly-level anomalies. |
Defects caught at the line, not in the field. Escape rates approach zero on complex builds. |
| 5 | IPC-A-610 Class 2 / 3 Verification Trained inspectors close the loop with workmanship verification against the IPC class your product demands. |
Yield you can stake a product launch on. |
Vapor phase fluid selection, profile development, and the Vision AI training stack are proprietary to Amtech.
Engineered for Easy Launch
A Tech Stack Built to Launch the Hardest Boards — Easily
Most contract manufacturers tell hardware teams to simplify the design. We built our process around the opposite assumption: that the assemblies driving the future of medical, defense, robotics, edge AI, and industrial IoT are supposed to be complex. Wide Process Window is the answer.
- Vapor phase reflow — physics-locked thermal control, no profile guesswork, no oxidation
- Vision AI inspection — adaptive defect detection beyond rule-based AOI
- Integrated cell — one tech stack, one quality record, one engineering team
- Easy launch — first-article success on dense, mixed-technology, high-reliability builds
If your design has been called “hard to manufacture” — that’s our specialty. Let’s talk.