Explore our top-tier RAM memory modules, SMT circuit assemblies, and structural electronics engineered for global OEM/ODM applications.
A woven fiberglass fabric impregnated with an epoxy resin binder. Known for its high mechanical strength, excellent dielectric properties, and stable performance at operating temperatures up to 130°C–180°C. FR-4 remains the default choice for high-speed signals and memory module motherboards (such as laptop and desktop DDR4/DDR5 systems).
Featuring a thin, thermally conductive, but electrically isolating dielectric layer sandwiched between a copper foil and a thick aluminum backing (typically 5052 or 6061 alloy). This structure delivers exceptional heat transfer rates (thermal conductivity ranges from 1.0 W/mK to 9.0 W/mK), crucial for solid-state LED systems and high-current power distribution blocks.
Composite Epoxy Materials combining cellulose paper core with woven glass surfaces. CEM-1 offers an economical alternative for low-complexity, cost-sensitive consumer appliances, while CEM-3 exhibits excellent punching properties and is widely applied in modern power modules and general household electronic controls.
| Material Type | Thermal Conductivity (W/m·K) | Dielectric Constant (Dk @ 1GHz) | Glass Transition Temp (Tg °C) | Primary Industrial Use Case |
|---|---|---|---|---|
| Standard FR-4 | 0.25 – 0.35 | 4.2 – 4.8 | 130 – 140 | Consumer devices, Control cards, Low-frequency electronics |
| High-Tg FR-4 | 0.35 – 0.45 | 4.1 – 4.5 | 170 – 180 | DDR5 Memory, Server Motherboards, Automotive controllers |
| CEM-1 | 0.15 – 0.20 | 4.5 – 5.0 | 110 – 120 | Power adapters, Toys, Basic home automation |
| Aluminum MCPCB | 1.5 – 4.0 | N/A (Metal Core) | 130 – 150 | High-brightness LED modules, Power supplies, Automotive lighting |
While single-sided boards are inherently cost-effective, shipping costs, assembly defects, and testing failures can elevate the final TCO. Procurement models are shifting toward "integrated sourcing" — purchasing PCBs that are pre-assembled (PCBA) using surface mount technology (SMT) under one roof to minimize manufacturing handoffs.
With product life cycles decreasing, system integrators demand vendors that release multiple new iterations annually. Exporters with independent R&D engineering divisions (such as Corexis's team of 128 engineers) can review Gerber files, adjust panelization, and transition prototypes to volume manufacturing within days.
Regulatory frameworks such as RoHS (Restriction of Hazardous Substances) and REACH dictate that chemical composition is verified down to the parts-per-million level. Reliable exporters must offer lead-free options, such as halogen-free laminates and lead-free HASL (Hot Air Solder Leveling) or ENIG (Electroless Nickel Immersion Gold) surface finishes.
Utilizing state-of-the-art Japanese and German placement heads, our lines place surface mount components down to 0201 packages with micron-level accuracy. We optimize solder paste volume using laser-cut stencils, minimizing the risk of solder bridging on fine-pitch components.
Whether it is custom logo printing, private labeling, modified heat sink geometries, or custom PCB layout routing, our design division coordinates directly with your engineering department. With 86 new product designs released last year, we manage design variations efficiently.
Every assembly is subjected to multi-point diagnostic checks. For high-speed DDR memory architectures, we use specialized test rigs to simulate real-world thermal cycles and signal stress conditions. This process ensures the product achieves near-zero field failure rates.
Verify that your chosen PCB and assembly manufacturer meets these crucial technical parameters before finalizing long-term supply agreements.
Ensure the manufacturer traces each component back to the silicon wafer source to eliminate counterfeit risks.
Check that SMT machines can place fine-pitch IC packages and pass 100% automated optical inspections.
Confirm the factory holds valid ISO 9001 and UL approvals, and conforms to RoHS and REACH directives.
Review the manufacturer's shipping experience to guarantee packaging integrity and on-time international delivery.
A: Single-sided aluminum-core PCBs (MCPCBs) offer superior thermal dissipation. The metal base quickly transfers heat away from critical components, making it ideal for high-brightness LEDs, power conversion stages, and motor controllers. Standard FR-4 has a much lower thermal conductivity (0.25 W/mK compared to 1.5–4.0 W/mK for aluminum), which can lead to thermal bottlenecks in high-power applications.
A: Corexis employs a 100% full-inspection system. This includes Incoming Quality Control (IQC) on all DRAM chips, In-Process Quality Control (IPQC) with automated optical inspection (AOI) after SMT, and final reliability/compatibility testing. This strict process ensures our memory modules maintain stable performance in demanding desktop, laptop, and server environments.
A: Electroless Nickel Immersion Gold (ENIG) and Organic Solderability Preservative (OSP) provide a flat, planar surface. This is essential for placing fine-pitch surface mount components and micro-BGAs. Standard HASL (Hot Air Solder Leveling) can result in uneven solder pads, which increases the risk of component misalignment and solder bridging during reflow.
A: Prototyping lead times range from 3 to 7 working days, depending on design complexity. For volume production, lead times typically range from 15 to 25 working days. Lead times are influenced by material availability, custom tooling requirements, and the scale of the production run.
A: Tg represents the temperature range at which the PCB substrate transitions from a rigid state to a softer, more flexible state. Choosing a High-Tg substrate (e.g., >170°C) prevents board warpage and delamination during high-temperature lead-free reflow processes. It also ensures long-term reliability in environments with elevated operating temperatures.
A: All manufacturing materials undergo testing to ensure compliance with RoHS and REACH regulations. This process verifies that heavy metals (such as lead, cadmium, and mercury) and flame retardants are kept below maximum allowable limits. This documentation is essential for smooth customs clearance and regulatory compliance in North American and European markets.
Browse our extended product portfolio, including custom development boards, flexible circuits, and server-grade memory modules.
Corexis Memory
