LCP-Celanese Vectra E840i
Fabricating three-dimensional molded interconnect devices (3D-MID) with integrated circuitry on polymer carriers requires high thermal soldering resistance and selective platability, which Celanese’s Vectra E840i LDS delivers through its 40% mineral-filled, laser-direct-structuring liquid crystal polymer (LCP) matrix. Boasting a density of 1.81 g/cm³ and a melting point of 335°C, this specialized grade contains active metal-catalysts optimized for subsequent chemical plating (copper, nickel, gold) while maintaining ultra-low warpage. Jucheng Precision, operating under strict ISO 9001 and IATF 16949 standards, specializes in high-precision molding of Vectra E840i. Backed by 35+ advanced presses and in-house 5-axis CNC tooling, we control its anisotropic shrink variables (0.1%-0.5%), delivering pristine micro-substrates verified by Zeiss CMM.
Vectra E840i LDS Plating & Mechanical Profile
VECTRA® E840i LDS is a 40% mineral filled, laser-direct-structuring Liquid Crystal Polymer (LCP) resin engineered by Celanese, designed to deliver stable plating performance, low warpage, and excellent heat resistance:
| Physical & Optical Property | Vectra E840i Spec Values | 3D-MID Molding Advantage |
|---|---|---|
| LDS Plating Catalyst | Metal-Organic Palladium Complex | Contains specialized organometallic additives, enabling high-precision laser activation and selective copper-nickel-gold plating. |
| High Stiffness Modulus | Tensile Modulus 10,000 MPa / Flexural 11,000 MPa | Delivers outstanding mechanical rigidity, ensuring complete dimensional integrity in high-density electronic assemblies. |
| Low Isotropic Warpage | 40% Isotropic Mineral Filler | Significantly reduces LCP anisotropic shrinkage, preventing part twisting and securing absolute coplanarity in SMT assemblies. |
Specialized 3D-MID Process Configurations for Vectra E840i
With its high mineral load and excellent thermal stability, Vectra E840i LDS is highly optimized for selective metallization:
| Molding Technology Class | Process Compatibility & Operational Details |
|---|---|
| Molded Interconnect Devices (3D-MID) | Excellent. The primary process for Vectra E840i. Optimized for multi-functional integrated electronic circuits, sensor mounts, and micro-substrates. |
| High-Density 5G Antennas | Excellent. Low dielectric tangent and high-heat dimensional stability are perfect for molding direct-platable high-frequency smartphone antennas. |
| Automotive Electronic Carriers | Good. High specific modulus, extremely low outgassing, and excellent chemical resistance allow clean powertrain electronic runs. |
LCP-Celanese Vectra E840i Tooling & LDS Quality Guide
Molding an ultra-high thermal resistant, 40% mineral-filled LCP like Vectra E840i LDS requires precise melt temperature controls and optimized mold venting:
Low-Warp Mold & Cooling Configuration
Because of the 40% mineral fillers, Vectra E840i LDS exhibits extremely low parallel shrinkage (0.10%) and low normal shrinkage (0.50%). Jucheng’s tooling division uses 5-axis CNC machines to cut precise mold cavities and balance cooling paths, preventing uneven thermal contraction and structural warping.
Pressurized Oil Mold Temperature Matrix
To prevent surface fibers from floating and secure maximum plating adhesion, mold temperatures must be maintained continuously at 80°C–120°C (176°F to 248°F) using pressurized oil temperature controllers. Low mold temperatures prevent the crystalline phase from forming correctly, resulting in part warpage.
S136 Hardened Steel Core (Cavity Protection)
40% short mineral fillers act as an abrasive medium under high injection speeds. Jucheng’s tooling division prevents cavity erosion by constructing molds with premium S136 stainless tool steel hardened to 48–52 HRC and machined on our 5-axis CNCs, ensuring long-term parting line precision and flash-free parts.
Extended Desiccant Pre-Drying Protocol
While LCP absorbs minimal water, moisture causes hydrolytic splay and weld line degradation. We desiccant-dry Vectra E840i LDS resin at 150°C (302°F) for 4–6 hours, keeping internal moisture below 0.01% to secure optimal molecular bonds.
Key Application Fields for LCP-Celanese Vectra E840i
- 3D Molded Interconnect Devices (3D-MID): Platable high-frequency smartphone antennas, selective metallization sensor carriers, integrated microelectronic circuits, and diagnostic micro-substrates.
- Automotive Powertrains & Electronics (IATF 16949): High-voltage EV battery connectors, powertrain control modules, LED lamp sockets, and electric water pump sensors.
- Medical Instruments (ISO 13485 Compliant): Minimally invasive surgical tips, high-end medical connectors, diagnostic cartridge bobbins, and catheter components requiring SMT soldering.
Properties
| Density | 1.81 g/cm³ |
| Tensile Modulus | 10,000 MPa |
| HardnessTensile Stress at Break | 100 MPa |
| Tensile Strain at Break | 3 % |
| Flexural Strength | 120 MPa |
| Flexural Modulus | 11,000 MPa |
| Charpy Notched Impact Strength (23°C) | 4 kJ/m² |
| Izod Notched Impact Strength (23°C) | 6 kJ/m² |
| Melting Temperature | 335 °C |
| Heat Deflection Temperature (HDT @ 1.80 MPa) | 227 °C |
| Linear Mold Shrinkage (Flow Direction) | 0.1 % |
| Linear Mold Shrinkage (Cross Direction) | 0.5 % |
| Electric Strength (2mm) | 28 kV/mm |
| Volume Resistivity | 2.0E+14 Ohm-cm |
| Maximum Part Size | 600 x 400 mm |
| Minimum Part Size (Micro Molding limit) | 0.1 x 0.1 mm |