Industries · 5G & AI
Liquid crystal polymer (LCP), polyphthalamide (PPA), and high-heat engineering grades for SMT connectors, mmWave antenna substrates, AI server sockets, and high-speed optical modules. Reference overview for electronics and datacom polymer procurement.
Industry Overview
A reference overview of engineering plastics used in 5G infrastructure, mmWave antenna modules, AI server interconnects, and high-speed optical transceivers.
Liquid crystal polymer (LCP) is a high-performance, highly ordered thermoplastic with very low dielectric constant (Dk < 3.0) and very low dissipation factor (Df < 0.005 at 10 GHz) in typical glass-fiber reinforced grades. Its low moisture absorption, high heat deflection temperature, and excellent flow in thin-wall sections make it the material of choice for SMT connectors and high-frequency antenna substrates operating at sub-6 GHz and mmWave frequencies.
AI accelerator cards and high-speed switches place extreme demands on connector polymers. High-flow LCP and PPA grades are used for board-to-board connectors, high-speed sockets (PCIe Gen5/Gen6, 112 / 224 Gb/s signalling), and optical-module housings where dimensional stability and dielectric performance must be maintained across the full operating temperature range.
Beyond connectors, low-Dk / low-Df LCP grades are being qualified for antenna substrates and antenna-in-package (AiP) modules in 5G mmWave handsets and small-cell infrastructure. PPA and PPS serve complementary roles in RF front-end housings and thermal management structures.
Jinsutong supplies a complete LCP portfolio across Ticona (Vectra), Polyplastics (Vectra), Sumitomo (Sumikasuper), and Celanese (Zenite) — giving electronics manufacturers flexibility across regional supply chains and qualification scenarios.
Recommended Grades
A selection of commonly traded LCP grades and adjacent high-heat engineering polymers used in 5G, AI server, and high-speed datacom applications.
| Grade | Manufacturer | Reinforcement | Features | Typical Use |
|---|---|---|---|---|
| Vectra® A130No vendor TDS · source on request | Ticona (Celanese) | 30% glass fiber | High flow, low warp | SMT connectors |
| Vectra® E130iNo vendor TDS · source on request | Ticona (Celanese) | 30% glass fiber | High heat (HDT 280°C+) | Lead-free soldering parts |
| Vectra® LCP E471i | Polyplastics | 30% glass fiber | High heat resistance | 5G SMT connectors |
| Vectra® LCP T130Internal snapshot · original TDS on request | Polyplastics | 30% glass fiber | High flow, thin-wall | Micro-miniature connectors |
| Zenite® 6330 | Celanese | 30% glass fiber | Low Dk / Df, high frequency | 5G mmWave antenna |
| Sumikasuper® E5008Internal snapshot · original TDS on request | Sumitomo Chemical | Filler | High flow, low viscosity | Micro-connectors |
| Sumikasuper® E6006Internal snapshot · original TDS on request | Sumitomo Chemical | Filler | Ultra high flow | Miniature connectors, SMD |
| Ultem® 2300 | SABIC (PEI) | 30% glass fiber | High stiffness + heat | High-frequency electrical connectors |
For PEI, PPA, and other high-heat engineering grades used in optical modules, AI accelerator cards, and datacom hardware, see the full grade reference.
Typical Applications
Reference application overview covering high-speed interconnects, mmWave antenna modules, AI server sockets, and optical transceivers.
LCP grades such as Vectra A130, E130i, and T130 are widely used for board-to-board SMT connectors, FPC connectors, and high-speed I/O headers where thin-wall flow, dimensional stability, and lead-free reflow compatibility (260–280°C peak) are all required.
Low-Dk / low-Df LCP grades (e.g. Zenite 6330) are being qualified for mmWave antenna substrates and antenna-in-package (AiP) modules in 5G smartphones, customer-premises equipment (CPE), and small-cell base stations where stable dielectric performance at 28 GHz / 39 GHz is essential.
High-flow LCP and high-heat PPA grades are used for high-density sockets, mezzanine connectors, and high-speed cable backplanes in AI accelerator cards and switches — supporting PCIe Gen5/Gen6, 112 Gb/s and 224 Gb/s signalling where signal integrity and thermal performance are both critical.
LCP, PPA, and high-heat PEI grades are used for optical-engine housings, ROSA / TOSA sub-mounts, and 400G / 800G / 1.6T transceiver bodies where low moisture uptake, dimensional stability, and reliability under thermal cycling are mandatory.
Why Choose Jinsutong
Complete LCP portfolio across Ticona, Polyplastics, Sumitomo, and Celanese — supporting electronics and datacom manufacturers.
We list LCP grades from all four major global suppliers — Ticona / Celanese (Vectra A130, E130i, Zenite 6330), Polyplastics (Vectra E471i, T130), and Sumitomo (Sumikasuper E5008, E6006) — enabling cross-source qualification and supply-risk mitigation.
Beyond LCP, our portfolio includes high-heat PPA (Amodel A-1133, Zytel HTN 51G35HSL), PEI (Ultem 1000 / 2300), PPS (Torelina A604), and PA46 (Stanyl TW series) — supporting RF front-end housings, thermal management, and structural components in the same electronics assembly.
Five core product lines plus 14 specialty engineering plastics let datacom OEMs and contract manufacturers consolidate polymer sourcing — from connector LCP and housing PEI to packaging EAA, EMAA, and EVOH — under one Shanghai-based supplier.
Major electronics manufacturing clusters in the Yangtze River Delta (Suzhou, Wuxi, Shanghai, Hangzhou) and the Greater Bay Area are within reach of our Fengxian base. Quick turnaround for sample requests, trial-batch coordination, and bonded-warehouse export flows.
Reach our Business Manager Mr. Mo Hailong directly via phone, email, or QQ for LCP and high-frequency polymer quotation, sample coordination, and qualification support — no call-center layers, no waiting.
Get in Touch
For LCP, PPA, PEI, or other high-frequency polymer grades, our business team is ready to support your qualification and procurement planning.
Case Studies
Fictional but realistic 5G/AI electronics scenarios. Frequency and SMT process are the primary design constraints.
A flagship smartphone SMT connector (0.15 mm wall thickness, 0.4 mm pitch, SMT reflow 260 °C peak) used Celanese Vectra A130 (LCP 30% GF). LCP extreme flow filled the ultra-thin walls; high HDT (270 °C) withstood reflow without blistering. Production: 100M+ units/year with < 50 ppm defect rate.
A 28 GHz 5G mmWave antenna module substrate used Celanese Vectra E130i (LCP 30% GF, low Df 0.003-0.005 at 10 GHz). Low Df preserved signal integrity; high Tg (no Dk shift up to 150 °C) maintained antenna performance under operating temperature. Module size: 8 × 12 mm with 4-element antenna array.
An AI server GPU socket (224-pin BGA, SMT reflow 260-280 °C peak, sustained 110 °C operating) used DuPont Zytel HTN 51G35HSLR (PPA 35% GF, laser-markable). PPA was selected over PPS for tighter dimensional tolerance and over LCP for cost. Insert-molded with high-conductivity copper contacts.
Decision Tree
Use this decision tree as a starting point. Operating frequency and SMT reflow requirements are the primary drivers.
⚠️ Reference decision tree. For project-specific grade selection, contact our business manager Mr. Mo Hailong at +86 138 1603 7020.
Material Comparison
Quick-reference comparison of the four most common high-frequency, high-heat engineering polymers used in 5G and AI electronics — typical values for glass-fiber reinforced (30%) grades.
| Property | LCP | PPA | PPS | PEI |
|---|---|---|---|---|
| Dk @ 1 GHz | 2.8–3.0 | 3.5–4.0 | 3.5–3.8 | 3.0–3.2 |
| Df @ 1 GHz | 0.002–0.005 | 0.008–0.015 | 0.002–0.005 | 0.002–0.005 |
| HDT @ 1.8 MPa (°C) | 240–280 | 280–300 | 260–280 | 200–210 |
| Continuous use temp (°C) | 220–240 | 160–180 | 200–220 | 170–180 |
| Melt flow (thin-wall) | Excellent | Good | Fair | Fair |
| Moisture absorption (%) | < 0.1 | 0.6–0.9 | < 0.05 | 0.25 |
| SMT reflow peak (°C) | 260–280 | 260–280 | 260–280 | 240–260 |
| Cost (relative) | High | Medium-high | Medium | High |
| Best for | High-frequency SMT connectors, mmWave antenna substrates, AiP | High-density sockets, structural RF parts, laser-markable | Thermal management, structural RF parts, lead-free SMT | Optical modules, high-stiffness housings, ROSA/TOSA |
Property values are typical of 30% glass-fiber reinforced grades. Refer to manufacturer datasheets for project-specific selection and confirm with our business manager Mr. Mo Hailong at +86 138 1603 7020.
SMT Process
Process notes for surface-mount assembly of high-frequency polymer connectors, sockets, and housings — covering reflow profile, moisture management, mold design, and regrind practice.
LCP and PPA both support lead-free reflow profiles with peak temperatures of 260–280 °C. The thermal soak zone (150–200 °C) should be held 60–90 seconds to ensure uniform temperature across large multi-pin connector arrays. Excessive peak temperature (> 290 °C) or extended time above 250 °C can cause polymer degradation and blistering, especially in PPA grades with high glass-fiber content. For double-side SMT with bottom-side LCP connectors, run the bottom side first at lower peak (≤ 260 °C) to protect the first-pass parts.
LCP has moisture absorption below 0.1% and is largely insensitive to humidity during reflow — it can be processed without pre-drying in most cases. PPA absorbs 0.6–0.9% moisture and must be dried before processing — typically 4–6 hours at 120 °C in a desiccant dryer, then molded within 1–2 hours to avoid re-absorption. Improperly dried PPA will show voids, splays, or surface bubbles after reflow. PEI requires similar drying discipline (4 hours at 150 °C).
LCP's highly ordered molecular structure produces anisotropic shrinkage that can cause warpage in large or unbalanced parts. Use balanced gate locations, uniform wall thickness, and consider glass-fiber orientation effects — fiber orientation in the connector pin cavity direction can differ by 0.1–0.3% from the transverse direction. PPA has more isotropic shrinkage and is generally easier to mold to tight tolerances. For ultra-thin-wall LCP connector designs (0.10–0.20 mm wall), gate location and runner balance are critical to avoid short-shot and weld lines.
LCP regrind from sprues and runners can be reused up to 20–30% without significant property loss, provided the regrind is dried and free of contamination. PPA and PPS are less forgiving — regrind ratios are typically capped at 10–15% for high-frequency applications where dielectric consistency matters. For mmWave antenna substrates and 224 Gb/s AI server sockets, most processors keep regrind below 10% to maintain tight dielectric tolerance.
FAQ
Common questions from electronics procurement and design engineering teams sourcing 5G and AI high-frequency polymers.
For 28 GHz mmWave antenna substrates, choose a low-Df LCP grade (Df < 0.005 at 10 GHz, glass-fiber reinforced 30%). Ticona Vectra E130i and Celanese Zenite 6330 are widely qualified. Verify with vector network analyzer (VNA) measurements of dielectric constant and loss tangent at your operating frequency, not just the 1 GHz datasheet value. For 39 GHz and higher, consider LCP film substrates with controlled thickness to keep insertion loss < 0.5 dB/cm.
LCP is preferred where the thinnest walls, tightest pitch, and highest operating frequency (PCIe Gen5/Gen6, 112/224 Gb/s signalling) are needed. PPA (DuPont Zytel HTN 51G35HSLR, Solvay Amodel A-1133) is preferred where dimensional tolerance, laser-marking contrast, and total cost of ownership are critical. Many AI accelerator card sockets use PPA rather than LCP because PPA molds to tighter tolerances and costs 30–50% less per part. For mixed designs, the SMT connector body can be PPA and the inner high-speed signal pins can be insert-molded LCP.
Modified LCP films are used as flexible PCB substrates for high-speed signal traces and antenna structures — particularly for USB 3.2, HDMI 2.1, and 5G mmWave antenna flex. However, for rigid PCB panels, the dominant materials remain modified epoxy (FR-4, high-Tg FR-4, low-loss FR-4), modified polyimide, and PPE/PPO. LCP excels in SMT connector bodies, AiP modules, and flexible substrates — not in large rigid PCB panels where CTE, multilayer lamination, and via reliability dominate.
Spot lead time for standard LCP grades (Vectra A130, E130i, T130, Zenite 6330, Sumikasuper E5008) is typically 4–8 weeks from China-based masterbatch distributors and traders. Contract pricing and framework agreements can secure 2–4 week lead times for high-volume programs. Emergency small-quantity orders can sometimes be filled in 1–2 weeks, but at significant price premium (15–30% above contract). For new grade qualification, add 8–12 weeks for initial sample coordination.
Domestic Chinese LCP production has matured significantly since 2020. Grades from Kingfa (KF-LCP series), Shanghai Pret Composites (PRET LCP), and Wuxi Shunma are used in some lower-frequency applications (SMT connectors at sub-6 GHz, FPC substrates). For mission-critical 5G mmWave and AI server high-frequency applications, imported grades (Ticona, Polyplastics, Sumitomo, Celanese) remain the safer choice. Discuss with our business team if you're evaluating domestic alternatives for specific applications — we can provide comparison samples and qualification support.