// Advanced Engineering Services

Reverse Engineering
& R&D

Decoding legacy hardware, cloning obsolete boards, and innovating custom electronic solutions from concept to production.

// Clone & Upgrade

PCB Reverse Engineering

Legacy systems are the backbone of many industries — from industrial automation and defense systems to medical equipment and telecommunications infrastructure. When these critical systems require replacement boards, the original manufacturer may no longer exist, documentation may be lost, and the original components may be obsolete. PCB Reverse Engineering solves this problem by meticulously decoding the physical hardware back into fully documented, manufacturable design files.

At SMTWISE Technology, our reverse engineering process goes far beyond simple board copying. We analyze circuit logic, identify component functions, trace signal paths across multiple layers, and generate complete schematic diagrams that accurately represent the original design intent. This deep understanding allows us to not just reproduce the board, but to upgrade it — replacing obsolete components with modern equivalents, improving performance, and extending the product lifecycle by decades.

Our Reverse Engineering Process

  • Physical Documentation: High-resolution imaging of every PCB layer using optical scanning and X-ray tomography. Each copper layer, solder mask, and silkscreen is digitized at resolutions sufficient to resolve 3mil traces.
  • Layer-by-Layer Tracing: Every trace, via, pad, and plane on every layer is meticulously traced and digitized into CAD data. Multi-layer boards (up to 20+ layers) are cross-sectioned when necessary to verify internal layer structures.
  • Component Identification: Every component is identified by manufacturer part number, package type, and electrical specification. When original parts are no longer available, our engineers identify pin-compatible, electrically equivalent modern replacements.
  • Schematic Generation: The netlist extracted from the PCB layout is used to generate a hierarchical schematic diagram that accurately represents the circuit's functional blocks, signal flow, and power distribution.
  • Gerber & BOM Output: Complete manufacturing files including Gerber RS-274X, NC drill files, pick-and-place centroid data, and a fully sourced Bill of Materials (BOM) with modern, available components.
  • Validation & Testing: The cloned board is fabricated, assembled, and functionally tested against the original to verify identical electrical performance before production release.

Why choose SMTWISE? We don't just copy circuits — we understand them. Our engineers analyze the design intent behind every circuit block so we can guarantee the cloned board performs identically to (or better than) the original, even with modern replacement components.

Files Required for PCB Fabrication and Assembly

Whether you're ordering from our reverse engineering output or submitting your own designs, a complete fabrication package should include:

  • Gerber Files: Individual files for each copper layer, solder mask (top/bottom), silkscreen (top/bottom), paste mask, board outline, and any mechanical layers in RS-274X or Gerber X2 format.
  • NC Drill File: Excellon format drill file specifying all hole locations, sizes, and whether they are plated or non-plated.
  • BOM (Bill of Materials): Spreadsheet listing every component with manufacturer part number, value, package/footprint, quantity, and reference designators.
  • Centroid/Pick-and-Place File: X/Y coordinates, rotation angle, and side (top/bottom) for every SMD component, used to program the placement machines.
  • Fabrication Notes: Board material, layer stackup, copper weight, surface finish, impedance requirements, IPC class, and any special instructions.
  • Assembly Notes: Solder type (leaded/lead-free), special handling requirements, conformal coating, programming, and testing specifications.

How to Watch Out for EOL and Obsolete PCB Components

End-of-Life (EOL) and obsolete components are a constant challenge in electronics manufacturing. A component that was readily available when your product was designed may become unavailable months or years later due to manufacturer discontinuation, technology shifts, or supply chain disruptions. Our proactive approach includes:

  • Continuous monitoring of component lifecycle status through distributor APIs and manufacturer product change notifications (PCNs)
  • Maintaining a cross-reference database of functionally equivalent alternates for critical components
  • Last-time-buy recommendations when components enter EOL notification
  • Redesign services to migrate circuits from obsolete to current-generation components

// Innovation Lab

Research & Development

Turn your concept into a production-ready product. Our dedicated R&D engineering team works alongside you to design, prototype, test, and iterate custom hardware solutions from the ground up. Whether you need a new IoT sensor board, a power management module, or a complete embedded computing platform, we have the expertise and equipment to bring it to life.

Custom PCB Design and Layout

Our PCB design team uses industry-leading tools including Altium Designer, KiCad, and Eagle to create optimized board layouts. We specialize in high-density interconnect (HDI) designs, controlled impedance routing for high-speed signals, mixed-signal layout with proper analog/digital isolation, and RF/microwave circuit design up to 40GHz.

PCB Layout Rules

Proper PCB layout is critical for signal integrity, EMI compliance, thermal management, and manufacturability. Our designers follow rigorous layout rules including:

  • Minimum trace width and spacing per fabrication capability and current requirements
  • Controlled impedance routing for high-speed differential pairs and single-ended signals
  • Proper power plane partitioning and decoupling capacitor placement
  • Guard rings and ground pours for sensitive analog circuits
  • Thermal via arrays under high-power components for heat dissipation
  • Component placement optimized for signal flow, thermal balance, and assembly access

Design Rule Check vs. Design for Manufacturing

A DRC (Design Rule Check) verifies that your layout meets the minimum geometric constraints defined in your design rules — trace width, spacing, annular ring, etc. A DFM (Design for Manufacturing) review goes much further, evaluating your design against the actual capabilities and limitations of the fabrication and assembly processes. DFM catches issues that a DRC cannot — such as acid traps, copper balance problems, thermal relief violations, and assembly access constraints.

Schematic Design Rules

Before layout begins, the schematic must be thoroughly reviewed for correctness. Key schematic design rules include: proper power and ground symbol usage, consistent net naming conventions, ERC (Electrical Rule Check) verification, decoupling capacitor placement for every power pin, proper termination of unused IC pins, and complete pin-to-pin connectivity verification.

Firmware and Embedded Systems Development

Our embedded engineers develop firmware for microcontrollers (STM32, ESP32, PIC, AVR), FPGAs (Xilinx, Intel), and application processors (ARM Cortex-A). Services include bootloader development, RTOS integration (FreeRTOS, Zephyr), wireless protocol stacks (BLE, Wi-Fi, LoRa, Zigbee), sensor driver development, and over-the-air (OTA) update systems.

DFM Rules

Design for Manufacturability (DFM) rules ensure your PCB design can be reliably and cost-effectively fabricated. Critical DFM considerations include:

  • Minimum annular ring size based on drill registration accuracy
  • Adequate copper-to-edge clearance (minimum 0.25mm for internal layers, 0.5mm for external)
  • Proper solder mask dam width between fine-pitch pads (minimum 0.075mm)
  • Via-to-pad and via-to-trace spacing that accounts for drill wandering
  • Balanced copper distribution to prevent warping during lamination
  • Panel utilization optimization to minimize material waste

Top DFM and DFA Mistakes that Delay Your PCB Production

We frequently encounter design issues that cause unnecessary delays and cost overruns. The most common mistakes include:

  • Missing or incorrect drill files that don't match the Gerber data
  • Insufficient annular rings that violate minimum fabrication rules
  • Solder mask slivers between fine-pitch component pads
  • Components placed too close to board edges for V-score or tab-route depaneling
  • Missing fiducial marks for SMT pick-and-place alignment
  • Incorrect footprints that don't match the actual component dimensions
  • BOM discrepancies between schematic values and specified part numbers
  • Non-standard board outlines that waste panel material

Free DFM Review: We offer complimentary Design for Manufacturability review on every order. Upload your Gerber files and we'll identify potential issues within 24 hours — before they become expensive production problems.

Rapid Prototyping and 3D Enclosure Modeling

Our prototyping lab delivers assembled boards in as few as 48 hours for urgent design validation cycles. We also provide 3D-printed enclosure prototypes to verify mechanical fit, connector access, and thermal performance before committing to injection mold tooling.

Start Your R&D Project

Have a Legacy Board That Needs Cloning?

Send us your obsolete PCB and we'll deliver a complete reverse-engineered design package — schematics, Gerbers, BOM, and assembled prototypes.

Request a Free Quote