OUR SERVICES
Board Fixtures and Carriers
Welcome to ELIPCB, your ultimate destination for PCB manufacturing insights and solutions. In the realm of printed circuit board (PCB) assembly, efficiency is paramount. Every step in the process, from design to fabrication and assembly, must be optimized for seamless operation and superior quality outcomes. Among the myriad factors influencing this efficiency, board fixtures and carriers play a crucial role.
Understanding Board Fixtures and Carriers
Board fixtures and carriers are the tooling that holds, supports, and protects a PCB through printing, placement, reflow, wave soldering, and testing. They are essential for thin boards, flexible boards, odd-form boards, and mixed-technology assemblies, where the board must stay flat and precisely positioned at every stage.
Types of Board Fixtures and Carriers
1. SMT Carrier / Pallet
Provides full-process support for thin boards (≤0.8 mm), flexible boards (FPC), and odd-form boards. Thin boards warp easily during printing and reflow, so a synthetic-stone carrier is used to keep them flat. Pocket depth is typically 0.05–0.1 mm shallower than the board thickness, and the board is secured with high-temperature tape or magnetic clamps. Positioning accuracy is held within ±0.05 mm across printing, placement, and reflow.
2. Wave Solder Pallet
Used for SMT + THT mixed-technology boards. The pallet uses a window design to expose only the through-hole lead areas while covering and protecting already-placed SMT components from the solder wave. Window edges are chamfered at 25° ± 5° to guide solder flow, and SMT components should sit ≥5 mm from the soldering area. Synthetic stone withstands 260–350°C and lasts over 10,000 cycles.
3. Print Support Fixture
Used in solder paste printing to correct PCB warpage. Vacuum support fixtures pull the board flat to within 0.002 in, eliminating paste thickness variation caused by an uneven surface. For double-sided boards, relief cavities prevent crushing already-placed components.
4. Test Fixture (ICT/FCT)
Used for in-circuit and functional testing. Probes contact test points to verify continuity or function. The fixture must ensure precise probe-to-point alignment and provide stable, repeatable positioning.
5. Stencil (Related Tooling)
Although technically a printing template rather than a fixture, stencils are often grouped with SMT tooling. Standard thickness is 0.12–0.15 mm; fine-pitch devices (<0.4 mm pitch) use 0.08 mm thin stencils to prevent bridging; step stencils handle mixed paste-volume requirements. Laser cutting accuracy reaches ±10 μm.
Material Selection
| Material | Application | Key Characteristics |
|---|---|---|
| Synthetic stone | Mainstream for SMT carriers and wave solder pallets | High-temperature resistance, low thermal mass, ESD-safe, high precision |
| Aluminum alloy | Applications needing rapid heat dissipation or lightweight tooling | Fast heat conduction, light weight, higher thermal mass |
| FR4 (fiberglass) | Small batches or less demanding products | Low cost, shorter service life |
Synthetic-stone carriers achieve ±0.05 mm accuracy and over 10,000 cycles of service life. Metal carriers offer higher accuracy with no aging issues, at a higher cost.
Experience Excellence with ELIPCB Board Fixtures and Carriers
From design conception to final assembly, ELIPCB delivers excellence at every stage of the PCB manufacturing process. Explore our comprehensive range of services and discover how we can elevate your projects to new heights of success.
Contact us today to learn more about our board fixtures and carriers and take the first step towards superior PCB assembly efficiency with ELIPCB.
Choosing the Right Solution with ELIPCB
At ELIPCB, we understand the critical importance of board fixtures and carriers in achieving optimal PCB assembly outcomes. That’s why we offer a comprehensive range of solutions tailored to meet the diverse needs of our customers.
Whether you’re looking for standard fixtures or customized carriers designed for unique board geometries, our team of experts is here to assist you every step of the way. With cutting-edge technology and a commitment to quality, ELIPCB is your trusted partner for success in PCB manufacturing.
Our Strengths
Thin boards get dedicated carriers — 0.4–0.8 mm boards are fully supported by synthetic-stone carriers; pocket depth is 0.05–0.1 mm shallower than board thickness to prevent print sinking and reflow warpage.
Mixed boards are protected by wave solder pallets — Pallet windows precisely protect placed components, and chamfered edges ensure smooth solder flow into joints.
Printing has vacuum support — Vacuum fixtures pull warped or double-sided boards flat to within 0.002 in, reducing printing defects at the source.
Fixture accuracy and life come with data — Synthetic-stone carriers: ±0.05 mm accuracy, 10,000+ cycles; metal carriers: higher accuracy for high-reliability applications.