| HS Code | 758351 |
| Product Name | Acenaphthylene Ex Resin for M8-M9 CCL |
| Manufacturer | Malion New Materials |
| Resin Type | Acenaphthylene hydrocarbon resin |
| Appearance | Light yellow to amber granular solid |
| Softening Point | 130-150 °C |
| Number Average Molecular Weight | 600-900 g/mol |
| Melt Viscosity At 200 C | 300-800 mPa·s |
| Dielectric Constant At 10 Ghz | ≤ 3.0 |
| Dissipation Factor At 10 Ghz | ≤ 0.002 |
| Glass Transition Temperature | > 180 °C |
| Thermal Decomposition Temperature 5 Weight Loss | > 400 °C |
| Moisture Absorption | < 0.05% |
| Solubility | Soluble in toluene, xylene, ketones, and esters |
| Application Field | High-frequency copper-clad laminates for M8/M9 grade CCL |
As an accredited Acenaphthylene Ex Resin for M8-M9 CCL - Malion factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Acenaphthylene Ex Resin for M8-M9 CCL - Malion is packaged in 25 kg net multi-layer paper bags with inner PE liner, palletized and shrink-wrapped. |
| Container Loading (20′ FCL) | 20′ FCL of Acenaphthylene Ex Resin for M8–M9 CCL by Malion, securely loaded and containerized for safe transport. |
| Shipping | Ship as non-hazardous chemical resin in sealed, moisture-resistant drums or bags. Avoid excessive heat and direct sunlight. Ensure proper labeling with product name and batch number. No special transport restrictions, but secure loads to prevent shifting. Keep dry and away from ignition sources. Dispose of spills per local regulations. |
| Storage | Store in a cool, dry, well-ventilated area below 25°C, away from direct sunlight, heat, sparks, and incompatible materials. Keep the container tightly sealed to prevent moisture absorption and contamination. Avoid prolonged exposure to air to minimize oxidation or polymerization. Follow manufacturer’s shelf-life recommendations and use proper handling practices. |
| Shelf Life | Shelf life is typically 12 months from manufacture when stored sealed in a cool, dry place. |
In 400G/800G switch backplane fabrication, the dielectric contribution of the resin matrix is evaluated before mechanical properties are considered. A typical starting formulation for M8-M9 CCL places Malion acenaphthylene ex resin at 15–35 wt% of total resin solids, with the balance split between a maleimide-terminated poly(phenylene ether) and a low-molecular-weight hydrocarbon toughener. The varnish is coated onto 1035 or 1078 E-glass fabric using a vertical treater with a 3-zone oven profile from 85 °C to 175 °C. Gel time is held at 130–170 s at 171 °C in accordance with IPC-TM-650 2.3.18, and residual volatile content after treat is maintained below 0.5 wt%. Lamination proceeds in a vacuum-assisted press at 190–210 °C for 90–120 min with a programmed heat-up ramp of 2–3 K/min; faster ramps can produce through-thickness resin starvation in the core because the acenaphthylene ex resin phase vitrifies before the maleimide network reaches full conversion. The terminal board for this segment is a 2.2 mm thick, 32-layer backplane with 100 µm line widths and laser-drilled microvias. Insertion loss at 28 GHz is measured by the fixture method and is expected to remain below 0.8 dB/in when the resin-rich pockets around 1035 glass are controlled. Published data for this specific product configuration is limited; therefore, CCL manufacturers typically run three resin-loading splits before committing to a press cycle. The observed production bottleneck on actual treaters is viscosity drift in the holding tank when the resin solution is held above 35 °C for more than 8 h, resulting in a 15–20 % increase in prepreg gel time and non-uniform resin fill at the glass crossover points.
Before the first prepreg run, the process window is defined by the stability of a ternary solvent system rather than by laminate dielectric performance alone. In M8-M9 basestation antenna CCL production, Malion acenaphthylene ex resin is dissolved in a 2-butanone/xylene/cyclohexanone blend at 45–55 % solids. The varnish viscosity at 25 °C is typically targeted between 200 cP and 500 cP, and the resin solution is held under nitrogen pressure to prevent moisture uptake above 0.1 %. Halogen-free formulations use a phosphorus-based flame retardant at 10–18 phr; this additive can reduce the onset temperature of thermal crosslinking, so the treater pan temperature is kept below 30 °C. Prepreg is produced on 7628 or 2116 glass, with a dry-stage dwell not exceeding 45 s above 150 °C to avoid advancing the B-stage too far. The terminal product is a 1.6 mm, 12-layer massive MIMO antenna board with impedance-controlled striplines and an ENEPIG surface finish. The acceptance window for dielectric constant at 10 GHz is commonly 3.2–3.5, and dissipation factor is held below 0.0025 when measured by the SPDR method of IPC-TM-650 2.5.5.9. Incompatibility occurs with amine-based latent curing agents, which can initiate the ex resin double-bond reaction during varnish mixing and shorten usable pot life to less than 4 h.
Millimeter-wave automotive radar laminates require a different resin response than digital backplane grades. For a 77 GHz microstrip patch array on a 127 µm core, the resin matrix must maintain phase-angle uniformity across the glass weave. Acenaphthylene ex resin is screened with a high-silica filler at 20–30 wt% to reduce the coefficient of thermal expansion in the z-axis; however, this filler raises the composite Dk and must be offset by reducing the aromatic content of the resin. The prepreg is pressed in a 2-step cycle with an intermediate pressure release at 130 °C to remove entrapped volatiles before final cure at 200 °C. Terminal boards are typically 3-layer radar transceiver substrates with 0.3 mm total thickness and laser-formed blind vias with via diameters of 100–125 µm. Conductor roughness is held below 1.5 µm Rz on copper foil to control insertion loss. In this segment, the critical failure mode observed on production lines is resin smearing during laser via formation; the desmear process uses an alkaline permanganate step at 70 °C for 12–15 min, and excessive acenaphthylene ex resin crosslink density can slow smear removal and produce voiding at the via base. Qualification therefore includes a 100-cycle thermal shock test per IPC-TM-650 2.6.7 followed by microsection analysis of the via wall.
If the same resin system is deployed in a 40-layer M8-M9 backplane with multiple sequential lamination steps, the resin must survive repeated exposure to 190 °C press temperatures without losing CAF resistance at the glass-resin interface. The test condition most closely tied to field failure is IPC-TM-650 2.6.16 with a 50 V bias at 85 °C and 85 % relative humidity for 1000 h. Formulations containing acenaphthylene ex resin are often modified with spherical silica at 15–25 wt% to suppress z-axis expansion; higher silica loadings reduce CAF failure probability but may raise the 10 GHz dissipation factor by 0.0002–0.0005 depending on filler particle size distribution. The press cycle uses a two-stage pressure profile: 15 kg/cm² during flow, then 30 kg/cm² after gel. To avoid lateral resin starvation in high-layer books, the prepreg stack is preheated under contact pressure for 20–30 min before final pressure is applied. The terminal product is a 40-layer probe card or network backplane with a board thickness of 3.2 mm, and the acceptance criterion for CAF testing is no dendritic growth longer than 25 µm from the conductor edge. Published data for acenaphthylene ex resin in this specific stack-up is limited, so production qualification generally includes a comparative microsection after 500 h of laminate exposure.
A comparative screening matrix is used to define the practical loading range of Malion acenaphthylene ex resin in M8-M9 CCL. The table below summarizes the test methods and typical acceptance windows evaluated at three resin-loading splits; the data are used for process window definition rather than as universal material specifications. Because the resin contributes both dielectric loss and crosslink density, the loading is not increased beyond 40 phr on resin solids in most qualification programs. Below 10 phr, thermal resistance improvement is insufficient for lead-free assembly, while above 40 phr the composite becomes sensitive to solvent attack during desmear, and copper peel can fall below 0.6 N/mm on low-profile copper foil.
| Test item | Method | Typical M8-M9 acceptance window |
|---|---|---|
| Dielectric constant at 10 GHz | IPC-TM-650 2.5.5.9 / IEC 61189-2-721 SPDR | 3.0–3.5 |
| Dissipation factor at 10 GHz | IPC-TM-650 2.5.5.9 / IEC 61189-2-721 SPDR | 0.0015–0.0030 |
| Glass transition temperature | IPC-TM-650 2.5.5.5 | ≥180 °C |
| Time to delamination at 288 °C | IPC-TM-650 2.4.24.6 | ≥60 min |
| Z-axis expansion before solder float | IPC-TM-650 2.4.41 | ≤3.0 % |
| CAF resistance | IPC-TM-650 2.6.16 | No failure after 1000 h at 85 °C/85 % RH |
| Flammability | UL 94 | V-0 |
The loading gradient is typically evaluated on 1035 glass with the same treater profile. Batch-to-batch variation in resin softening point should be kept within ±3 °C; wider variation changes prepreg resin flow and can shift the final resin content by more than 1.5 wt% across a 0.1 mm core.
IC package substrate core qualification differs markedly because the resin system must withstand HDI laser drilling and aggressive electroless copper chemistry. In thin-core applications for flip-chip BGA substrates, Malion acenaphthylene ex resin is formulated at 20–30 wt% on resin solids with a low-CTE epoxy hardener and a phenoxy toughener. The target core thickness is 60–100 µm, and the prepreg is pressed at 200 °C under 40 kg/cm² to achieve a resin content of 55–65 wt% on 1027 glass. Laser via drilling uses a UV-CO₂ hybrid process; microvias of 50–70 µm diameter require resin with a homogeneous crosslink density to avoid barrel cracking after desmear. Desmear is performed in a swelling agent at 60 °C followed by alkaline permanganate at 70 °C for 10–15 min, and the final via should show no positive etchback exceeding 2 µm. The terminal product is a 4-layer core substrate for a flip-chip BGA package with fine lines of 15/15 µm line/space. Production bottlenecks are related to prepreg handling: thin 1027 glass with high resin loading is prone to wrinkle formation when the B-stage resin is too soft, so the prepreg is stored at 5–10 °C and allowed to stabilize at room temperature for 2 h before cutting.
RF power amplifier boards subject the cured resin to sustained temperatures above 120 °C, and the primary material limitation is oxidative embrittlement at the resin-copper interface. In such applications, acenaphthylene ex resin is used with a brominated epoxy or halogen-free char-forming additive at 15–25 phr. The baseplate is a 2.0 mm laminate with 70 µm copper inner layers and a thermal via array under the transistor flange. Long-term aging is screened by conditioning coupons at 150 °C for 500 h and then measuring copper peel per IPC-TM-650 2.4.8; retention of more than 80 % of the initial peel value is a typical internal acceptance criterion. Solder float at 288 °C for 30 s after aging is also required to detect oxidative degradation at the resin-copper interface. The resin must be pre-dried if exposed to relative humidity above 60 % for more than 24 h, because absorbed moisture produces voiding at the thermal via wall during wave soldering. In this segment, the end product is a power amplifier module board for 5G base stations with 8–12 RF power transistors and an operating junction temperature near 175 °C; published data for acenaphthylene ex resin in this exact stack-up is limited, so OEM qualification typically requires a 1000 h biased humidity test at 85 °C/85 % RH with impedance monitoring.
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Acenaphthylene Ex Resin for M8-M9 CCL, supplied by Malion, is a reactive aromatic hydrocarbon modifier intended for low-loss, high-thermal-stability copper-clad laminates. The active chemistry incorporates acenaphthylene-derived fused-ring structures that reduce polar functionality relative to epoxy or bismaleimide networks; this structural difference has direct implications for dissipation factor when cured laminates are measured at 10 GHz and above under IPC-TM-650 2.5.5.9. Malion designates the product as Acenaphthylene Ex Resin for M8-M9 CCL; the designation identifies the target application class rather than a distinct molecular-weight sub-grade. The commercial designation places the resin within OEM-defined M8-M9 CCL material windows rather than a single published industry specification. Qualification is therefore performed against the laminate manufacturer’s internal specification, supported by lot-specific certificates of analysis for solution viscosity, solids content, softening point, gel time, and cured-resin electrical data. Publicly available data for this exact Malion product configuration is limited; the following material emphasizes test methodology, production-scale processing boundaries, and formulation differences that can be verified through first-article qualification.
The principal structural difference is the combination of a rigid polynuclear aromatic ring and a polymerizable exocyclic unsaturation. In dicyclopentadiene resins, the aliphatic cyclic backbone contributes lower inherent moisture resistance and a more flexible cured network; acenaphthylene’s fused aromatic rings provide higher aromatic carbon density, which can be measured indirectly through TGA residue and moisture uptake per IPC-TM-650 2.6.2.1. In bismaleimide systems, the maleimide ring introduces polar carbonyl and nitrogen groups that increase dissipation factor; Acenaphthylene Ex Resin is formulated to reduce the concentration of such polar groups while retaining the thermal rigidity required for lead-free assembly. Against polyphenylene ether, which offers low dielectric constant but requires careful compatibilization and high-temperature curing, the acenaphthylene-based resin contributes reactive unsaturation that can enter the crosslinked network rather than remaining as a thermoplastic diluent. These differences must be confirmed by comparative cured-laminate testing under IPC-TM-650 2.5.5.13 for Dk/Df, IPC-TM-650 2.4.24 for CTE, and IPC-TM-650 2.4.25 for glass transition temperature.
From a formulation standpoint, Acenaphthylene Ex Resin generally enters the varnish at lower polarity than epoxy or bismaleimide, which affects filler settling and coupling-agent selection. Silane coupling agents used for silica-filled M8-M9 CCL formulations should be re-evaluated, because the lower hydroxyl density of the acenaphthylene resin can reduce the efficiency of conventional epoxy-silane treatments. Filler dispersion is assessed by fineness of grind or low-shear yield stress measured on a rotational rheometer; batch-to-batch variation in filler wetting can appear as high-shear viscosity fluctuations during prepreg coating.
On production horizontal treaters, varnish rheology and solvent-release behavior govern whether Acenaphthylene Ex Resin can be converted into stable M8-M9 prepregs. The resin is dissolved or diluted in ketone/aromatic solvent blends; viscosity is commonly measured at 25°C using a Brookfield rotational viscometer under ISO 2555:2018. Production-scale impregnation requires a varnish bath temperature maintained between 25°C and 35°C, with continuous viscosity correction. On a treater operating at line speeds of 3–15 m/min, prepreg resin content is maintained by a metering roll or comma bar; deviations in resin pickup above ±1.5 wt% can shift the pressed dielectric thickness outside the M8-M9 impedance target. B-stage advancement is verified by residual solvent and gel time. Gel time measured by stroke cure at 171°C per IPC-TM-650 2.3.18 is used to detect advancement drift. Residual solvent is normally controlled below <0.5 wt% by oven profile adjustment; incomplete solvent removal is a known contributor to void formation and delamination during vacuum lamination. High ambient humidity above 60% RH can promote moisture pickup in acenaphthylene-containing prepregs, and pre-drying of prepreg stacks is typically required before lamination when storage exposure exceeds 8 h.
The impregnation efficiency of Acenaphthylene Ex Resin is also influenced by glass fabric surface chemistry and finish. Low-void M8-M9 CCL results require that the resin solution wet woven glass without excessive capillary trapping; bubble entrainment in the varnish bath is reduced by controlling return flow, maintaining bath level, and using a defoaming vacuum pot on the recirculation loop. These process details are not captured by standard resin property data but become visible as microvoids or resin-rich lines in cured panels. If the resin is transferred to a treater with shorter oven length or lower exhaust capacity, residual solvent can exceed <0.5 wt% unless line speed or temperature setpoints are revalidated.
For M8-M9 CCL qualification, dielectric constant and dissipation factor are evaluated using IPC-TM-650 2.5.5.9 or split-post resonator methods referenced by IPC-TM-650 2.5.5.13, with measurements at 10 GHz or the OEM-specified frequency span up to 40 GHz. Acceptance limits are not universal; M8-M9 CCL designations are OEM-defined, and electrical targets vary with glass style, resin content, and copper profile. For this Malion product, published data for the exact configuration is limited, so first-article testing should establish Dk/Df values on the actual laminate construction. Thermal reliability is assessed through solder float resistance per IPC-TM-650 2.4.13, water absorption per IPC-TM-650 2.6.2.1, and dielectric breakdown per IPC-TM-650 2.5.6. The aromatic nature of the resin reduces polarizable hydroxyl and ester groups; this mechanism is conventionally associated with lower dissipation factor, but the magnitude must be confirmed on the full laminate because fillers, flame retardants, and copper surface treatment also contribute to dielectric loss.
| Property | Method designation | Measurement condition or equipment |
|---|---|---|
| Solution viscosity | ISO 2555:2018 | Brookfield rotational viscometer, 25°C |
| Non-volatile content | ISO 3251:2019 | Forced-air oven, temperature per method |
| Softening point | ISO 4625-1:2020 | Ring-and-ball apparatus |
| Gel time | IPC-TM-650 2.3.18 | Stroke cure at 171°C |
| Dk/Df | IPC-TM-650 2.5.5.9 | Resonator or split-post, 10–40 GHz |
| Water absorption | IPC-TM-650 2.6.2.1 | Immersion, 24 h distilled water |
| CTE | IPC-TM-650 2.4.24 | TMA, expansion range per laminate type |
| Tg | IPC-TM-650 2.4.25 | DSC or TMA, heating rate per method |
Thermal stress testing is typically conducted at 288°C according to IPC-TM-650 2.6.8 or an OEM-specific reflow profile to detect delamination after exposure to lead-free assembly temperatures. In laminate qualification, coupons are floated on molten solder at 288°C for 10 s, followed by visual and acoustic inspection. This test is especially diagnostic for incompletely cured acenaphthylene-containing networks because retained unsaturation can generate additional crosslinking and outgassing during the first thermal excursion.
Under vacuum-press conditions, the flow behavior of the B-staged resin system determines whether the pressed laminate meets thickness, dielectric spacing, and void criteria. In production-scale vacuum presses, M8-M9 CCL stacks are typically laminated at peak metal or platen temperatures between 190°C and 220°C, with full vacuum applied before resin gelation. Pressure is ramped in stages; initial low contact pressure permits volatiles removal, while final pressure of 2.5–4.0 MPa consolidates the glass cloth and promotes copper wetting. Acenaphthylene Ex Resin requires confirmation of the gel point against the press profile because premature gelation before adequate flow produces resin-starved edges and dry-glass defects, whereas excessive flow can carry filler particles away from the core. Minimum melt viscosity, commonly measured by dynamic rheometry at 1 Hz with a parallel-plate rheometer, is a more useful control parameter than single-point melt viscosity. Void content is inspected by ultrasonic scanning or cross-section microscopy after lamination; acceptance criteria typically reject voids larger than 50 μm in high-speed digital laminates. If pre-preg storage humidity exceeds 60% RH, vacuum-drying at 120°C for 2–4 h is commonly applied before lay-up.
| Equipment | Parameter | Typical range or control point |
|---|---|---|
| Horizontal treater | Varnish bath temperature | 25–35°C |
| Horizontal treater | Residual solvent in prepreg | <0.5 wt% |
| Horizontal treater | Line speed | 3–15 m/min |
| Vacuum press | Peak laminate temperature | 190–220°C |
| Vacuum press | Final consolidation pressure | 2.5–4.0 MPa |
| Parallel-plate rheometer | Minimum melt viscosity | Lot-specific, establish by first article |
| Ultrasonic C-scan | Void size acceptance | <50 μm |
| Prepreg dryer | Pre-drying | 120°C, 2–4 h if storage RH > 60% |
Controlled cooling after lamination is also relevant. If the press is cooled too rapidly from peak temperature, residual stress can produce warp or twist in thin M8-M9 cores. Cooling rates below 5°C/min are commonly used for thin laminates to reduce warpage; the exact ramp depends on panel thickness, copper distribution, and the ratio of resin to glass reinforcement.
When bismaleimide is displaced from a halogen-free M8-M9 CCL formulation, the curing chemistry shifts from maleimide addition to a less polar hydrocarbon-unsaturation network. This substitution requires reformulation of the catalyst or initiator package; amine-based accelerators that are effective with bismaleimide may be incompatible because they can induce premature addition or alter the storage stability of the varnish. The curing exotherm and reaction onset should be re-established by differential scanning calorimetry at 10°C/min under ISO 11357-1:2016, with the press profile adjusted accordingly. Halogen-free flame-retardant additives such as phosphorus-containing compounds or nitrogen synergists must be checked for interaction with the unsaturated resin; acid-generating flame retardants can accelerate polymerization during varnish storage. Compared with bismaleimide, the resin is expected to improve dissipation factor and moisture resistance due to reduced imide and carbonyl content, but the actual difference must be verified by fabricating paired laminates and testing under IPC-TM-650 2.5.5.13 and IPC-TM-650 2.6.2.1.
Incoming inspection of Acenaphthylene Ex Resin should include batch-to-batch control of solution viscosity, residual monomer, and gel time. The manufacturer’s certificate of analysis should be matched against internal data; batch-to-batch variance in reactive unsaturation can alter lamination flow even when viscosity remains within specification. Storage should be under dry, cool conditions in sealed containers; exposure to direct sunlight or temperatures above 35°C may advance polymerization. The operational boundary for reliable prepreg production is strongly affected by the chosen solvent blend, which must be revalidated if the resin is transferred between treater lines with different oven lengths or exhaust capacities. Production release should follow pilot-scale prepreg runs and full electrical, thermal, and reliability testing on the M8-M9 CCL construction specified by the end user.
