1. Prezentare generală a produsului: What Is an Automotive Communication 2+N+2 HDI Board?
TheAutomotive Communication 2+N+2 HDI Board este o interconectare de înaltă densitate (HDI) placa de circuit imprimat engineered specifically for vehicle communication systems. This product adopts a14-strat stack-up structure withS1000-2M high-performance copper-clad laminate as the core substrate material. It achieves high-density, high-reliability interlayer interconnection through an advanced process combining2 laser drilling cycles şi3 lamination cycles.
Within the PCB HDI classification system, 2+N+2 denotes a specific build-up structure—adding 2 build-up layers on each side of the core substrate (N layer) using the sequential build-up (SBU) metodă. Compared to 1+N+1 (first-order HDI), 2+N+2 represents asecond-order HDI soluţie, offering higher wiring density and more sophisticated interconnection capabilities.
UGPCB, as a professional Producător de PCB, delivers high-quality PCB HDI products that comply with the IPC-6012FA automotive applications addendum—the industry’s most stringent reliability standard for automotive electronics.
2. Clasificarea produselor: Scientific Positioning and Technology Tier
This product can be scientifically classified across multiple dimensions:
By IPC-6012 Performance Class: Class 3/A—the highest reliability tier for automotive electronics. IPC-6012F tightens through-hole resistance change after thermal cycling from 10% la amaximum of 5% for Class 3/A, and increases minimum barrel copper thickness from 25 µm la28 µm.
By HDI Order: Second-Order HDI (2+N+2)—a mid-complexity HDI solution positioned between first-order HDI (common in consumer electronics) and high-end any-layer HDI.
By Material Loss Tier: Pierderea mijlocie (Df < 0.010).
După domeniul aplicației: Automotive Electronics—in-vehicle communication, ADAS, V2X, etc.
După evaluarea inflamabilității: Ul 94 V-0—the highest vertical burn rating, requiring self-extinguishment within 10 seconds with no flaming drips.
3. Core Parameters and Technical Specifications
| Parametru | Caietul de sarcini | Standard de referință |
|---|---|---|
| Laminat | S1000-2M (Shengyi Technology) | IPC-4101/126 |
| Număr de straturi | 14 Straturi | - |
| Grosimea plăcii | 1.6 ± 0.16 mm | IPC-6012F |
| Minimum Laser Via Diameter | 0.10 mm | - |
| Minimum Mechanical Hole Diameter | 0.20 mm | - |
| Lățimea minimă a urmelor / Spațiere | 75 µm / 75 µm | IPC-2221C |
| Raportul de aspect | 8:1 | IPC-2221 |
| Temperatura de tranziție a sticlei (TG) | 180° C. (DSC) | IPC-TM-650 2.4.25 |
| Temperatura de descompunere termică (TD) | 355° C. | Shengyi S1000-2M Datasheet |
| Constanta dielectrică (Dk @ 1GHz) | 4.6 | Shengyi S1000-2M Datasheet |
| Factor de disipare (Df @ 1GHz) | 0.013 | Shengyi S1000-2M Datasheet |
| Evaluarea inflamabilității | Ul 94 V-0 | Ul 94 Standard |
| Proces special | 2 Foraj cu laser, 3 Laminations | - |
Aspect Ratio Calculation is a critical process parameter in Fabricarea PCB-urilor that directly determines plating quality and through-hole reliability. Conform ghidurilor IPC-2221, Aspect Ratio = Board Thickness ÷ Drilled Hole Diameter. For this product: 1.6 mm ÷ 0.2 mm = 8:1. IPC-2221 recommends a maximum aspect ratio of 8:1 la 10:1 for conventional electrolytic plating processes. The 8:1 design ensures reliability while fully validating UGPCB’s process capability in high-aspect-ratio through-hole plating.
4. Material Deep Dive: S1000-2M High-Performance Substrate
S1000-2M is a high-performance FR-4.0 copper-clad laminate manufactured by Shengyi Technology. Este olead-free compatible high-Tg material.
Parametri cheie de performanță (Sursă: Shengyi Technology official datasheet and IPC-TM-650 test methods):
| Parametru | Valoare | Metoda de testare |
|---|---|---|
| TG (Temperatura de tranziție a sticlei) | 180° C. (DSC) | IPC-TM-650 2.4.25 |
| TD (Temperatura de descompunere termică) | 355° C. | Shengyi Datasheet |
| T260 | > 60 minute | IPC-TM-650 |
| T288 | 30 minute | IPC-TM-650 |
| Cte (Axa Z, sub Tg) | 41 PPM/° C. | IPC-TM-650 |
| Cte (Axa Z, deasupra Tg) | 208 PPM/° C. | IPC-TM-650 |
| Coajă de rezistență (after 288°C solder float) | 1.3 N/mm | IPC-TM-650 |
Core Advantages of S1000-2M:
- Mid-Loss Characteristics: Cu un Df de 0.013 @ 1GHz, this material offers approximately28% lower dielectric loss compared to standard FR-4 (Df ≈ 0.018).
- Rezistenta termica ridicata: Tg of 180°C and Td of 355°C meet the stringent requirement of continuous operation above 125°C in automotive environments.
- Caf (Filament Anodic Conductiv) Rezistenţă: Suitable for high-multilayer PCBs and high-humidity environments.
- Ul 94 V-0 Evaluarea inflamabilității: Self-extinguishes within 10 seconds with no flaming drips.
5. Elemente esențiale de design: 2+N+2 HDI Architecture Explained
5.1 What Is the 2+N+2 Structure?
The 2+N+2 HDI board is manufactured using the sequential build-up method:
- N Layer: The core substrate layer (multilayer core formed by inner-layer lamination)
- 2 Build-up Layers on Each Side: Constructed sequentially through 2 laser drilling cycles and 2 lamination cycles on both sides of the core
2 Laser Drilling Cycles respectively form the microvias for the first build-up layer (L1-L2, L13-L14) and the second build-up layer (L2-L3, L12-L13).
3 Lamination Cycles include: core layer lamination → first build-up layer lamination → second build-up layer lamination.
5.2 Tehnologia Microvia
- Laser Blind Vias: 0.10 mm diameter, formed using CO₂ or UV laser drilling
- Mechanical Buried Vias: 0.20 mm diameter, used for interlayer interconnection within the core
- Stacked/Staggered Via Design: Supports stacked or staggered microvia structures for maximum layout flexibility
5.3 Circuitul de linie fină
Minimum trace width and spacing of 75 µm (aproximativ 3 mil) comply with IPC-2221C requirements for fine-line design. This precision supports fan-out routing for 0.5 mm pitch BGAs.
5.4 Controlul impedanței
With a Dk of 4.6 @ 1GHz, S1000-2M enables characteristic impedance control at 50Ω, 90Oh, and 100Ω through adjustment of trace width and dielectric thickness—meeting the signal integrity requirements of in-vehicle communication systems.
6. Principiul de lucru: How Does an HDI Board Achieve High-Density Interconnection?
Traditional multilayer PCBs rely ongăuri de trecere that penetrate the entire board thickness for layer-to-layer connections—consuming significant routing area.PCB HDI technology overcomes this limitation through several innovations:
1. Blind Via Technology: Laser-drilled microvias connect only the outer layer to the adjacent inner layer (De ex., L1-L2) fără să pătrundă în toată placa.
2. Buried Via Technology: Mechanically drilled vias are completely contained within the core layer (De ex., L3-L12) and do not appear on the board surface.
3. Sequential Build-Up Method: Build-up layers are constructed sequentially, with each additional layer providing additional routing resources.
4. Stacked Via Interconnection: Blind vias on upper and lower layers can be stacked in alignment to create signal paths spanning multiple layers.
In a 14-layer 2+N+2 structure, a signal can travel from the surface layer (L1) through a 0.10 mm laser blind via to L2, then through a second-layer laser blind via to L3, then through a mechanical buried via within the core to L12, and finally through symmetrical build-up blind vias to the bottom layer (L14)—achievingsignal transmission across 14 layers without consuming surface-layer routing area.
7. Caracteristici de performanță: Why Is This Board Ideal for Automotive Communication?
7.1 IPC-6012FA Automotive Standard Compliance
În decembrie 2025, IPC (now the Global Electronics Association) officially releasedIPC-6012FA, celAutomotive Applications Addendum to IPC-6012F Qualification and Performance Specification for Rigid Printed Boards. This addendum applies to rigid printed boards that must survive the vibration and thermal cycling environments of electronic interconnects within the automotive industry.
IPC-6012F (released October 2023) represents the most significant tightening of automotive PCB reliability requirements in over a decade. Key changes include:
- Through-Hole Resistance Change: Tightened from 10% la amaximum of 5% for Class 3/A
- Barrel Copper Thickness: Increased from 25 µm la28 µm for Class 3/A
- IST (Interconnect Stress Testing): Changed from optional tomandatory, cu un minim de500 cicluri for Class 3/A
- Stacked Microvias: Requiringseparate qualification at the stacked via level
7.2 Thermal Cycling Reliability
Automotive electronics face continuous operating temperaturesabove 125°C in engine compartments and EV battery-adjacent environments. With Tg of 180°C, Td of 355°C, T260 > 60 minute, and T288 of 30 minute, S1000-2M ensures dimensional stability and dielectric performance under extreme thermal conditions.
7.3 Integritatea semnalului
In-vehicle communication systems (V2X, ADAS, Automotive Ethernet) continue to push operating frequencies higher. Cu un Df de 0.013 @ 1GHz, S1000-2M is a mid-loss material that supports10G–25G SerDes channels with excellent performance over link lengths up to 20 inci.
7.4 Vibration Resistance
IPC-6012FA specifically addresses automotive vibration environments. The 14-layer HDI board’s multilayer laminated structure provides excellent mechanical strength. Combinația de 0.10 mm laser microvias and 0.20 mm mechanical holes ensures connection reliability under vibration.
8. Procesul de fabricație: De la materie primă la produs finit
Pas 1: Inner-Layer Core Fabrication
- Core material cutting → inner-layer circuit imaging → etching → AOI inspection
Pas 2: First Lamination
- Stack multiple inner-layer cores with prepreg → high-temperature high-pressure lamination → core substrate (N layer) formare
Pas 3: First Laser Drilling & Placare
- First laser drilling on both sides of the core (forming L1-L2, L13-L14 microvias) → desmear → electroless copper deposition → electrolytic copper filling
Pas 4: First Build-Up Lamination
- Laminate first build-up layer material on both sides of the core →Second Lamination
Pas 5: Second Laser Drilling & Placare
- Second laser drilling (forming L2-L3, L12-L13 microvias) → desmear → electroless copper deposition → electrolytic copper filling
Pas 6: Second Build-Up Lamination
- Laminate second build-up layer material on both sides of the core →Third Lamination
Pas 7: Foraj mecanic
- Drill 0.20 mm mechanical through-holes and buried vias (within L3-L12 core)
Pas 8: Outer-Layer Circuit Fabrication
- Outer-layer circuit imaging → etching → solder mask → surface finish (De acord, etc.)
Pas 9: Inspecție finală
- Electrical testing → Sonda zburătoare testing → final AOI → reliability sampling (IST, ciclism termic, etc.)
9. Scenarii de aplicație: Core Interconnection Solutions for In-Vehicle Communication Systems
1. Sisteme avansate de asistență pentru șofer (ADAS)
ADAS requires multi-sensor fusion (radar cu undă milimetrică, LiDAR, camere de luat vederi). The 2+N+2 HDI board supports microstrip antenna integration and RF impedance control in radar modules with its high-density interconnection capability.
2. V2X (Vehicle-to-Everything) Comunicare
V2X modules demand integration of communication RF front-ends, procesare în bandă de bază, and power management within compact spaces—making HDI PCB’s high-density characteristics an ideal choice.
3. Automotive Ethernet
10G/25G automotive Ethernet switches require stringent signal integrity control. S1000-2M’s mid-loss characteristics ensure low-loss transmission for high-speed signals.
4. Zonal Controllers
Next-generation vehicle architecture zonal controllers process massive data volumes. The 14-layer 2+N+2 HDI board provides ample routing layers and flexible interconnection structures.
5. Sisteme de management al bateriei (BMS)
EV battery management system PCBs must maintain long-term reliability in high-temperature, high-vibration environments—exactly the scenario addressed by S1000-2M material and IPC-6012FA standards.
10. De ce să alegeți UGPCB?
- IPC-6012FA Compliance: Strict adherence to the latest automotive PCB standard released December 2025
- Advanced HDI Manufacturing Capability: Supporting 2+N+2, 3+N+3, and any-layer HDI structures
- Materiale certificate: S1000-2M certified to UL 94 V-0, compliant with IPC-4101/126 specifications
- Controlul de calitate end-to-end: Full-process inspection from raw materials to finished products, ensuring Class 3/A reliability
- Răspuns rapid: Professional engineering team providing DFM (Proiectare pentru producție) recenzii
📞 Request a Quote Today
UGPCB specializes in the R&D and manufacturing ofautomotive electronics HDI PCBs. Fie că ai nevoie2+N+2 HDI boards, 14-layer high-multilayer PCBs, or otherautomotive communication PCB solutii, we provide one-stop services from design optimization to volume production.
📧 Send your Gerber files or technical requirements to: sales@ugpcb.com
🔗 Visit the UGPCB website for an instant quote
Declarația surselor de date
Datele tehnice și informațiile standard citate în acest document sunt derivate din următoarele surse autorizate:
- IPC (Global Electronics Association) — IPC-6012FSpecificații de calificare și performanță pentru plăci imprimate rigide (octombrie 2023), IPC-6012FAAutomotive Applications Addendum (December 2025), IPC-2221CStandard generic pentru designul plăcii imprimate (august 2025), IPC-4101ESpecificații pentru materiale de bază pentru plăci imprimate rigide și multistrat, IPC-TM-650Manualul metodelor de testare
- Shengyi Technology — S1000-2M Product Datasheet and Technical Data Sheet
- Ul (Laboratoarele Underwriters) — UL 94 V-0 Flammability Rating Standard
Nota: All data is cited from publicly available official standard documents or manufacturer specifications to the greatest extent possible. Specific values may vary slightly due to test conditions and batch differences. Readers are advised to refer to the latest official documentation for the most current specifications.
