Several PCB manufacturers are particularly well known for high-density interconnect (HDI) technology, especially laser microvias, sequential build-up, stacked/Any-Layer microvias, fine line/space, and substrate-like PCB structures.
AT&S — A major high-end HDI specialist. AT&S says HDI was foundational to its development in high-end PCBs and emphasizes miniaturization, fine structures, and high-speed interconnects.
TTM Technologies — Particularly strong in advanced microvia and HDI, including stacked microvias, sequential structures, Ultra-HDI, and high-speed applications. Its current capabilities include HDI with lines/spaces down to 75 µm and advanced stacked-microvia technologies.
Unimicron Technology — A major Asian HDI and IC-substrate manufacturer, with extensive experience in fine-line, stacked-microvia and advanced build-up technologies. It is consistently identified among major HDI suppliers.
Compeq Manufacturing — One of the established leaders in HDI, with a significant focus on high-end HDI and advanced mobile/communications applications.
Ibiden — Well known for high-end PCB and semiconductor-package-related technologies and has historically been a major high-end HDI supplier.
Tripod Technology — Another significant HDI producer, with expertise spanning high-layer-count boards and advanced HDI structures.
Zhen Ding Technology — A large-scale PCB producer with advanced HDI capabilities, particularly relevant to high-volume consumer electronics.
Meiko Electronics — An established HDI manufacturer with applications including automotive and communications electronics.
If you're selecting a manufacturer
For very demanding HDI, I'd specifically investigate their capabilities for:
Any-Layer HDI / ELIC
Stacked vs. staggered microvias
Via-in-pad and copper-filled microvias
Minimum line/space (e.g., 75/75 µm, 50/50 µm, or below)
Sequential lamination cycles
Fine-pitch BGA escape routing
Low-loss/high-speed materials
Registration tolerance and yield at production volumes
For example, TTM explicitly supports stacked microvias and applications down to very fine-pitch BGA structures, while AT&S positions HDI as a core technology for high-end miniaturized products.
If you tell me whether you're looking for prototype/low-volume, high-volume consumer electronics, automotive, aerospace/defense, or AI/server boards, I can narrow this to the most relevant manufacturers and compare their HDI capabilities.
Several global PCB manufacturers are recognized for their advanced technical capabilities and market leadership in High-Density Interconnect (HDI) technology, substrate-like PCBs (SLPs), and microvia production.
Key industry leaders known for their HDI expertise include:
TTM Technologies : A major global printed circuit board manufacturer with a strong footprint in North America and Asia. They specialize in ultra-fast HDI prototypes, high-layer-count boards, and advanced microvia technologies for aerospace, defense, automotive, and high-end computing.
AT&S (Austria Technologie & Systemtechnik): A premier European-headquartered manufacturer with massive, high-tech production capabilities in Asia. They are widely regarded as pioneers in cutting-edge HDI, modified semi-additive processes (mSAP), and embedded component packaging.
Zhen Ding Technology : Frequently ranked as one of the largest global PCB producers. Zhen Ding has a massive market presence in mobile and wearable device miniaturization, excelling in rigid HDI boards, flexible printed circuits (FPCs), and advanced IC substrates.
Compeq Manufacturing : A prominent Taiwan-based manufacturer known for high-precision engineering and high-volume production of HDI and substrate-like PCBs (SLPs) used in mainstream smartphones, tablets, and IoT devices.
Ibiden : A Japanese tech powerhouse heavily relied upon for high-end IC packaging substrates and complex multi-layer HDI architectures. They lead in technological readiness for high-performance computing and advanced processor integration.
Unimicron Technology : Another major Taiwanese leader with extensive capabilities in high-speed HDI, multi-layer rigid boards, and semiconductor substrates catering to computing and telecommunication giants.
If you are looking for a supplier, would you like to narrow these down based on geographic region (e.g., North America vs. offshore volume production), application (medical, aerospace, consumer electronics), or prototype vs. mass production needs?
TTM Technologies — Particularly strong in advanced microvia and HDI, including stacked microvias, sequential structures, Ultra-HDI, and high-speed applications. Its current capabilities include HDI with lines/spaces down to 75 µm and advanced stacked-microvia technologies.
Unimicron Technology — A major Asian HDI and IC-substrate manufacturer, with extensive experience in fine-line, stacked-microvia and advanced build-up technologies. It is consistently identified among major HDI suppliers.
