HDI PCB Manufacturing in India

03 May 2026
New

HDI PCB manufacturing in India has evolved rapidly to meet demand for miniaturized, high-speed electronics, with local and global manufacturers delivering IPC-6012-compliant high density interconnect solutions. The sector specializes in 1+N+1/2+N+2/3+N+3 stackups, laser microvias, and advanced materials, supported by government initiatives and a focus on automotive, telecom, and consumer applications. Key players including Hemeixin Electronics, Leiton India, FCC India, and AS&R Circuits India Pvt Ltd drive precision production, with capabilities extending to ELIC (Every Layer Interconnect) for ultra-high-density designs.

Top HDI PCB Manufacturers in India

Hemeixin Electronics

Hemeixin Electronics is a global hdi pcb manufacturer with a strategic Indian manufacturing hub, delivering high-density interconnect, rigid-flex, and ELIC PCB solutions for automotive, 5G telecom, medical, and consumer electronics. The facility operates with 5 production lines, a monthly capacity of 15,000 sq.m HDI PCB, and 5,000 sq.m rigid-flex PCB, balancing rapid prototyping and mass production.

Precision HDI Capabilities: Minimum line width/spacing 0.025mm (1mil) for prototypes, 0.05mm (2mil) mass production; laser microvias 0.05mm diameter, ±10μm registration tolerance.
Stackup Expertise: Supports 1+N+1, 2+N+2, 3+N+3, and ELIC structures with up to 16 conductive layers.
Via Technology: IPC-4761 Type VII VIPPO (via-in-pad plated over) with 100% epoxy fill and 20μm copper plating; stacked microvias (2–3 layers) for 0.3mm pitch BGAs.
Quality & Compliance: IPC-6012 Class 3, ISO 9001, IATF 16949, ISO 13485 certified; 100% AOI, flying probe test, TDR impedance verification (±3% tolerance), thermal shock (-40°C to 125°C, 100 cycles).

Leiton India

Leiton India is a Bangalore-based HDI PCB fabricator with 15+ years of expertise in high-density interconnect and rigid-flex PCB manufacturing. Focused on consumer wearables, automotive infotainment, and industrial IoT, it operates an ISO 9001:2015-certified plant with 8,000 sq.m monthly capacity.

Core Capabilities: 0.05mm line width/spacing, 0.075mm microvias, 1+N+1/2+N+2 stackups.
Materials: High-Tg FR-4 (Tg≥170°C), polyimide for flex-HDI.
Lead Times: Prototypes 5–7 days, mass production 3–5 weeks.

FCC India

FCC India is a leading Noida-based HDI PCB manufacturer specializing in high-volume, cost-effective high density interconnect solutions for smartphones, wearables, and budget consumer electronics. It holds IPC-6012 Class 2 and ISO 14001 certifications, with a monthly capacity of 12,000 sq.m.

Key Specs: 0.075mm line width/spacing, 0.1mm microvias, 1+N+1/2+N+2 stackups.
Focus: Mass production for mid-tier consumer electronics; competitive pricing with consistent quality.

AS&R Circuits India Pvt Ltd

AS&R Circuits India Pvt Ltd is a Hyderabad-based joint venture, combining global expertise with local manufacturing for medical, industrial, and aerospace HDI PCB applications. It specializes in high-reliability high density interconnect, rigid-flex, and metal-core PCBs, with ISO 9001, ISO 13485, and IPC-6012 Class 3 certifications.

Precision Features: 0.05mm line width, 0.075mm microvias, 3+N+3 stackups, impedance control ±4%.
Advanced Materials: Low-loss hydrocarbons, LCP for high-frequency medical devices.

Key Aspects of HDI PCB Manufacturing in India

Capabilities & Major Producers

India’s HDI PCB manufacturing sector balances precision and volume, with capabilities spanning standard to ultra-high-density designs.

Production Scale: Monthly capacity ranges from 5,000–15,000 sq.m per plant; total national capacity exceeds 80,000 sq.m monthly.
Layer Range: 2–16 layers, with 4–8 layers as standard for consumer and automotive applications.
Precision Tiering:
- Standard: 0.075mm line width, 0.1mm microvias (FCC India, mid-tier manufacturers).
- Precision: 0.05mm line width, 0.075mm microvias (Leiton India, AS&R Circuits).
- Ultra-Precision: 0.025mm line width, 0.05mm microvias, ELIC (Hemeixin Electronics, advanced facilities).
Major Producers: Hemeixin Electronics, Leiton India, FCC India, AS&R Circuits, AT&S India, Fine-Line Circuits.

Industry Drivers & Technological Focus

Consumer Electronics (40% of demand): Smartphones, wearables, TWS earbuds driving 1+N+1/2+N+2 HDI adoption.
Automotive (30% of demand): ADAS, EV control units requiring AEC-Q100-compliant HDI with thermal resistance.
5G/Telecom (20% of demand): Base stations, routers needing low-loss materials and impedance-controlled routing.
Government Impact: “Atmanirbhar Bharat” and Electronics Components Manufacturing Scheme (ECMS) offer subsidies for HDI PCB fabrication, reducing import reliance by 35% since 2023.
Technological Shift: From single-sided HDI to ELIC and ultra-HDI; increased adoption of mSAP (Modified Semi-Additive Process) for fine-line production.

Key Benefits of HDI PCB

Miniaturization: 40% smaller form factors vs standard multilayer PCBs; enables compact wearable and IoT devices.
Performance: 50% shorter signal paths, 40% reduced parasitic inductance; supports 10Gbps+ high-speed signals.
Efficiency: Higher routing density reduces layer count by 30%, lowering material and assembly costs.
High Pin Count Compatibility: Supports 0.3mm pitch BGAs and advanced SoCs critical for 5G and AI applications.

Key HDI Capabilities in India

Laser Drilling & Microvias

UV Laser Drilling: Standard for microvias; 0.05–0.15mm diameter, 1:1 aspect ratio, ±10–15μm positional accuracy.
Blind/Buried Microvias: Connect outer to inner layers; eliminate through-vias, reduce signal noise.
Copper Fill: 90%+ minimum fill for microvias; prevents voids, ensures structural integrity (IPC-4761).

Layer Structures & High-Density Routing

1+N+1: Single microvia layers on both sides; 2–4 layers, cost-effective for wearables.
2+N+2: Double microvia layers; 4–6 layers, standard for smartphones and mid-tier electronics.
3+N+3: Triple microvia layers; 6–8 layers, high-density 5G and automotive applications.
ELIC (Every Layer Interconnect): Microvias between all layers; 8–16 layers, 3× higher density than 3+N+3, for AI accelerators.
High-Density Routing: 45°/arc bends only (no 90° corners), staggered traces (offset 0.5× trace width), serpentine routing for dynamic flex zones.

Advanced Materials & Production Capacity

Standard HDI Materials: High-Tg FR-4 (Tg≥170°C, Dk=4.0, Df=0.012); 70% of Indian HDI production.
High-Speed Materials: Isola FR408HR (Dk=3.6, Df=0.006), Rogers RO4350B (Dk=3.48, Df=0.0037); 5G/RF applications.
ELIC Materials: Low-loss hydrocarbons, LCP (Dk=3.0, low moisture absorption); ultra-high-speed designs.
Copper Weights: Outer layers 12μm (0.5oz) standard, 18μm (1oz) high-current; inner layers 12μm (0.5oz) only.

Key HDI Capability Specifications

Trace & Space

Mass Production: 0.05mm (2mil) minimum line width/spacing (Leiton India, AS&R Circuits).
Prototypes: 0.025mm (1mil) minimum line width/spacing (Hemeixin Electronics).
Impedance Control: ±3–5% tolerance for 50Ω single-ended/100Ω differential pairs.

Microvias & Via Technology

Diameter: 0.05mm (ultra-precision), 0.075mm (precision), 0.1mm (standard).
VIPPO: IPC-4761 Type VII; epoxy fill + 20μm copper plate over; pad diameter = via +0.15mm, annular ring ≥0.025mm.
Stacked Vias: 2–3 layer stacks, ±10μm alignment; supported by Hemeixin Electronics.

Layer Count & Registration Accuracy

Standard HDI: 2–8 layers.
ELIC: 8–16 layers.
Registration Accuracy: ±10μm (ultra-precision), ±15μm (precision), ±25μm (standard).

Types of HDI Structure & Performance Advantages

HDI Structure Comparison

Parameter	1+N+1	2+N+2	3+N+3	ELIC
Layer Count	2–4	4–6	6–8	8–16
Microvia Layers	1 per side	2 per side	3 per side	All layers
Routing Density	Baseline	+50%	+100%	+300%
Cost Premium	Baseline	+20%	+40%	+60%
Primary Application	Wearables	Smartphones	5G Modules	AI Accelerators

Key Performance Advantages

Reduced Signal Noise: Shorter paths and fewer vias lower crosstalk by 50% vs standard multilayer PCBs.
Miniaturization: 40% smaller form factors enable compact, lightweight devices.
Improved RF Performance: Low-loss materials and controlled impedance enhance 5G signal integrity.
High Pin Count Components: Supports 0.3mm pitch BGAs, critical for modern SoCs and FPGAs

Case Study

Project Overview

A Bangalore-based 5G startup required an 8-layer 3+N+3 HDI PCB for a 5G IoT gateway: 0.05mm line width, 0.075mm microvias, VIPPO for 0.3mm pitch BGA, 100Ω differential impedance, 2,000 prototypes + 20,000 mass units, 4-week lead time.

Technical Challenges & Solutions

Challenge 1: Microvia misalignment (±25μm) during lamination, 18% prototype failure.
Solution: Adopted vacuum lamination with ±12μm alignment (Hemeixin process); misalignment reduced to <8μm, failure rate 2.5%.
Challenge 2: Impedance variation (±10%) from inconsistent dielectric thickness.
Solution: Calibrated dielectric to ±3% tolerance via laser metrology; achieved ±4% impedance consistency.
Challenge 3: VIPPO pad dents (≥0.02mm) causing assembly defects.
Solution: Increased plated copper to 25μm, optimized fill curing; dents eliminated, yield 99.5%.

Outcome

Prototypes delivered in 5 days, mass production completed in 3.5 weeks. Met IPC-6012 Class 3, 99.6% yield, 12% lower cost than imported quotes.

Common Design Errors

Microvia & VIPPO Mistakes

Undersized Annular Ring: <0.025mm for 0.075mm vias → plating defects, 6% prototype failures.
Partial Epoxy Fill: Incomplete VIPPO fill → solder wicking, assembly short circuits.
Via Placement Under Solder Mask: No expansion → mask cracking, exposure during reflow.

Stackup & Material Flaws

Asymmetric Stackup: Unbalanced copper → >0.8% warpage, assembly misalignment.
Mismatched CTE: Core/prepreg CTE difference >30ppm/°C → thermal stress, delamination.
Over-Spec Materials: Rogers for <10GHz → +50% cost, no performance gain.

Routing & Density Errors

90° Trace Corners: Stress risers, increased crack risk under thermal cycling.
Insufficient Trace-to-Via Spacing: <0.05mm → short circuits during plating.
Ignoring Manufacturer Design Rules: Exceeding minimum line width/spacing → production delays, reduced yield.

FAQ

Q1: What is the minimum line width/spacing for HDI PCB in India?

A1: 0.05mm (2mil) for mass production, 0.025mm (1mil) for prototypes (Hemeixin Electronics, ultra-precision facilities).

Q2: Which Indian manufacturers support ELIC PCB production?

A2: Hemeixin Electronics is the primary Indian manufacturer supporting 8–16 layer ELIC PCB with copper-filled stacked microvias.

Q3: What quality control standards apply to Indian HDI PCB manufacturing?

A3: IPC-6012 Class 2/3, IPC-2221, IPC-4761; 100% AOI, flying probe test, TDR impedance verification, thermal shock testing.

Q4: What is the typical lead time for HDI PCB prototypes in India?

A4: 3–5 days for ultra-precision prototypes (Hemeixin Electronics), 5–7 days for standard precision (Leiton India, AS&R Circuits).