1. Обзор продукта: What Is an Automotive Communication 2+N+2 HDI Board?
TheAutomotive Communication 2+N+2 HDI Board это межсоединение высокой плотности (ИЧР) печатная плата engineered specifically for vehicle communication systems. This product adopts a14-слой 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 и3 lamination cycles.
Within the HDI печатная плата classification system, 2+Н+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) метод. Compared to 1+N+1 (first-order HDI), 2+N+2 represents asecond-order HDI решение, offering higher wiring density and more sophisticated interconnection capabilities.
УГКПБ, as a professional Производитель печатных плат, delivers high-quality HDI печатная плата products that comply with the IPC-6012FA automotive applications addendum—the industry’s most stringent reliability standard for automotive electronics.
2. Классификация продуктов: 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% кmaximum of 5% for Class 3/A, and increases minimum barrel copper thickness from 25 µm to28 мкм.
By HDI Order: Second-Order HDI (2+Н+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: Средний убыток (Дф < 0.010).
По домену приложения: Automotive Electronics—in-vehicle communication, Адас, V2X, и т. д..
По классу воспламеняемости: UL 94 В-0—the highest vertical burn rating, requiring self-extinguishment within 10 seconds with no flaming drips.
3. Core Parameters and Technical Specifications
| Параметр | Спецификация | Справочный стандарт |
|---|---|---|
| Ламинат | С1000-2М (Shengyi Technology) | IPC-4101/126 |
| Количество слоев | 14 Слои | - |
| Толщина доски | 1.6 ± 0.16 мм | МПК-6012Ф |
| Minimum Laser Via Diameter | 0.10 мм | - |
| Minimum Mechanical Hole Diameter | 0.20 мм | - |
| Минимальная ширина трассировки / Расстояние | 75 мкм / 75 мкм | МПК-2221С |
| Соотношение сторон | 8:1 | МПК-2221 |
| Температура стеклянного перехода (Тг) | 180°С (ДСК) | ИПК-ТМ-650 2.4.25 |
| Температура термического разложения (Тд) | 355°С | Shengyi S1000-2M Datasheet |
| Диэлектрическая проницаемость (Dk @ 1GHz) | 4.6 | Shengyi S1000-2M Datasheet |
| Коэффициент рассеяния (Df @ 1GHz) | 0.013 | Shengyi S1000-2M Datasheet |
| Рейтинг воспламеняемости | UL 94 В-0 | UL 94 Стандартный |
| Специальный процесс | 2 Лазерное сверление, 3 Laminations | - |
Aspect Ratio Calculation is a critical process parameter in Производство печатных плат that directly determines plating quality and through-hole reliability. Согласно рекомендациям IPC-2221, Aspect Ratio = Board Thickness ÷ Drilled Hole Diameter. Для этого продукта: 1.6 mm ÷ 0.2 мм = 8:1. IPC-2221 recommends a maximum aspect ratio of 8:1 к 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. Этоlead-free compatible high-Tg material.
Ключевые параметры производительности (Источник: Shengyi Technology official datasheet and IPC-TM-650 test methods):
| Параметр | Ценить | Метод испытания |
|---|---|---|
| Тг (Температура стеклянного перехода) | 180°С (ДСК) | ИПК-ТМ-650 2.4.25 |
| Тд (Температура термического разложения) | 355°С | Shengyi Datasheet |
| T260 | > 60 минуты | ИПК-ТМ-650 |
| T288 | 30 минуты | ИПК-ТМ-650 |
| КТР (ось Z, ниже Тс) | 41 ppm/° C. | ИПК-ТМ-650 |
| КТР (ось Z, выше Тс) | 208 ppm/° C. | ИПК-ТМ-650 |
| Прочность на очистку (after 288°C solder float) | 1.3 N/мм | ИПК-ТМ-650 |
Core Advantages of S1000-2M:
- Mid-Loss Characteristics: С Df 0.013 @ 1 ГГц, this material offers approximately28% lower dielectric loss compared to standard FR-4 (Df ≈ 0.018).
- Высокое термическое сопротивление: Tg of 180°C and Td of 355°C meet the stringent requirement of continuous operation above 125°C in automotive environments.
- Каф (Проводящая анодная нить) Сопротивление: Suitable for high-multilayer PCBs and high-humidity environments.
- UL 94 В-0 Рейтинг воспламеняемости: Self-extinguishes within 10 seconds with no flaming drips.
5. Основы дизайна: 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 (Л1-Л2, L13-L14) and the second build-up layer (L2-L3, L12-L13).
3 Lamination Cycles включать: core layer lamination → first build-up layer lamination → second build-up layer lamination.
5.2 Технология микровий
- Laser Blind Vias: 0.10 диаметр мм, formed using CO₂ or UV laser drilling
- Mechanical Buried Vias: 0.20 диаметр мм, used for interlayer interconnection within the core
- Stacked/Staggered Via Design: Supports stacked or staggered microvia structures for maximum layout flexibility
5.3 Fine-Line Circuitry
Minimum trace width and spacing of 75 мкм (примерно 3 мил) comply with IPC-2221C requirements for fine-line design. This precision supports fan-out routing for 0.5 BGA с шагом мм.
5.4 Контроль импеданса
С ДК 4.6 @ 1 ГГц, S1000-2M enables characteristic impedance control at 50Ω, 90Ой, and 100Ω through adjustment of trace width and dielectric thickness—meeting the signal integrity requirements of in-vehicle communication systems.
6. Принцип работы: How Does an HDI Board Achieve High-Density Interconnection?
Traditional multilayer PCBs rely onсквозные отверстия that penetrate the entire board thickness for layer-to-layer connections—consuming significant routing area.HDI печатная плата technology overcomes this limitation through several innovations:
1. Слепой через технологию: Laser-drilled microvias connect only the outer layer to the adjacent inner layer (например, Л1-Л2) не проникая во всю доску.
2. Buried Via Technology: Mechanically drilled vias are completely contained within the core layer (например, 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. Характеристики производительности: Why Is This Board Ideal for Automotive Communication?
7.1 IPC-6012FA Automotive Standard Compliance
В декабре 2025, МПК (now the Global Electronics Association) officially releasedIPC-6012FA, аAutomotive 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.
МПК-6012Ф (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% кmaximum of 5% for Class 3/A
- Barrel Copper Thickness: Increased from 25 µm to28 мкм for Class 3/A
- IST (Interconnect Stress Testing): Changed from optional tomandatory, с минимальным500 цикл 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 минуты, and T288 of 30 минуты, S1000-2M ensures dimensional stability and dielectric performance under extreme thermal conditions.
7.3 Целостность сигнала
In-vehicle communication systems (V2X, Адас, Automotive Ethernet) continue to push operating frequencies higher. С Df 0.013 @ 1 ГГц, S1000-2M is a mid-loss material that supports10G–25G SerDes channels with excellent performance over link lengths up to 20 дюймы.
7.4 Vibration Resistance
IPC-6012FA specifically addresses automotive vibration environments. The 14-layer HDI board’s multilayer laminated structure provides excellent mechanical strength. Сочетание 0.10 mm laser microvias and 0.20 mm mechanical holes ensures connection reliability under vibration.
8. Производственный процесс: От сырья к готовому продукту
Шаг 1: Inner-Layer Core Fabrication
- Core material cutting → inner-layer circuit imaging → etching → AOI inspection
Шаг 2: Первое ламинирование
- Stack multiple inner-layer cores with prepreg → high-temperature high-pressure lamination → core substrate (N layer) формирование
Шаг 3: First Laser Drilling & Покрытие
- First laser drilling on both sides of the core (forming L1-L2, L13-L14 microvias) → desmear → electroless copper deposition → electrolytic copper filling
Шаг 4: First Build-Up Lamination
- Laminate first build-up layer material on both sides of the core →Второе ламинирование
Шаг 5: Second Laser Drilling & Покрытие
- Second laser drilling (forming L2-L3, L12-L13 microvias) → desmear → electroless copper deposition → electrolytic copper filling
Шаг 6: Second Build-Up Lamination
- Laminate second build-up layer material on both sides of the core →Third Lamination
Шаг 7: Механическое бурение
- Сверлить 0.20 mm mechanical through-holes and buried vias (within L3-L12 core)
Шаг 8: Outer-Layer Circuit Fabrication
- Outer-layer circuit imaging → etching → solder mask → surface finish (СОГЛАШАТЬСЯ, и т. д.)
Шаг 9: Заключительная проверка
- Electrical testing → Летающий зонд testing → final AOI → reliability sampling (IST, термоциклирование, и т. д.)
9. Сценарии приложения: Core Interconnection Solutions for In-Vehicle Communication Systems
1. Расширенные системы помощи водителю (Адас)
ADAS requires multi-sensor fusion (МИЛЛИМЕТОР-волна радара, Лидар, камеры). 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) Коммуникация
V2X modules demand integration of communication RF front-ends, baseband processing, 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. Системы управления батареями (Бит)
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. Почему выбирают 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
- Сертифицированные материалы: S1000-2M certified to UL 94 В-0, compliant with IPC-4101/126 specifications
- Сквозной контроль качества: Full-process inspection from raw materials to finished products, ensuring Class 3/A reliability
- Быстрое реагирование: Professional engineering team providing DFM (Дизайн для производства) reviews
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Декларация источника данных
Технические данные и стандартная информация, приведенные в этом документе, взяты из следующих авторитетных источников.:
- МПК (Global Electronics Association) — МПК-6012ФКвалификационные и эксплуатационные характеристики жестких печатных плат (Октябрь 2023), IPC-6012FAAutomotive Applications Addendum (декабрь 2025), МПК-2221СОбщий стандарт проектирования печатных плат (Август 2025), МПК-4101ЕСпецификация базовых материалов для жестких и многослойных печатных плат, ИПК-ТМ-650Руководство по методам испытаний
- Shengyi Technology — S1000-2M Product Datasheet and Technical Data Sheet
- UL (Андеррайтеры лаборатории) — УЛ 94 В-0 Flammability Rating Standard
Примечание: 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.
