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HDI PCBs

High Density Interconnect (HDI) printed circuit boards with advanced microvia technology, enabling miniaturized designs with superior signal integrity and reliability.

Advanced HDI PCB Solutions

HDI technology is the cornerstone of modern compact electronics. By utilizing laser-drilled microvias, fine-line traces, and sequential build-up (SBU) construction, HDI PCBs pack more functionality into smaller footprints while improving electrical performance through shorter signal paths.

At HXP Circuit, we offer a full spectrum of HDI capabilities from 1+N+1 basic HDI to any-layer interconnect, supporting the most demanding applications in consumer electronics, medical devices, and aerospace systems.

  • Laser-drilled microvias from 0.075mm (3 mil)
  • Fine line/space: 3/3 mil (0.075mm/0.075mm)
  • Sequential build-up: 1+N+1, 2+N+2, any-layer HDI
  • Microvia aspect ratio up to 1:1
  • Via-in-pad (VIP) technology with plugging
  • Copper-filled stacked microvias
  • Coreless and ultra-thin constructions
  • Blind, buried, and staggered via structures

Technical Specifications

General Specifications

  • Technology: 1+N+1, 2+N+2, Any-Layer HDI
  • Max Build-up Cycles: 6+ (any-layer)
  • Material: FR-4 High-Tg, Polyimide, Low-loss
  • Board Thickness: 0.2mm - 3.2mm
  • Copper Weight: 0.5oz - 3oz
  • Max Panel Size: 610mm × 610mm

Microvia Specifications

  • Via Diameter (Laser): 0.075mm (3 mil)
  • Via Diameter (Mechanical): 0.15mm (6 mil)
  • Aspect Ratio: 1:1 max
  • Via Fill: Copper / Non-conductive paste
  • Via Capping: Electroplated copper
  • Registration Accuracy: ±0.025mm

Fine Line Capabilities

  • Min Line Width: 0.075mm (3 mil)
  • Min Line Spacing: 0.075mm (3 mil)
  • Inner Layer Registration: ±0.03mm
  • Impedance Tolerance: ±10% (±5% controlled)
  • Solder Mask Registration: ±0.05mm
  • Surface Finishes: ENIG, OSP, HASL, ENEPIG, Immersion Ag

Quality Standards

  • Certification: UL 94V-0, ISO 9001:2015
  • Standards: IPC-6012 Class 2/3, IPC-6016
  • Electrical Test: 100% flying probe / fixture
  • Micro-section Analysis: IPC-A-600
  • Thermal Stress: 288°C / 10s, 3x solder float
  • RoHS: RoHS & REACH compliant

Applications

Smartphones & Tablets

Ultra-compact HDI motherboards and camera modules for mobile devices requiring maximum density in minimal space.

Wearable Electronics

Flex-rigid HDI combinations for smartwatches, fitness trackers, and medical wearables with space constraints.

Medical Devices

High-reliability HDI for implantables, diagnostic equipment, and portable monitoring devices.

Aerospace & Defense

Military-grade HDI boards with extended temperature range and vibration resistance for mission-critical systems.

IoT & Wireless

Compact HDI for IoT sensors, gateways, and 5G NR modules demanding high-frequency signal integrity.

Automotive

HDI for ADAS camera modules, radar, LiDAR, and in-vehicle infotainment systems.