High-End Packaging Substrate Cycle Strengthens; Supply-Demand Tightness May Persist for Two to Three Years

Overview

Based on Japan's June production statistics, Nomura notes that packaging substrate shipment value and unit prices both reached record highs. Growth was driven mainly by higher prices for high-end products and expanding AI- and server-related packaging demand, while advanced manufacturing capacity and yield constraints are expected to keep supply-demand conditions tight.

Core views

The report believes this round of supply tightness has a more durable foundation than the short-term order rush in 2022: larger high-end substrates are reducing yields, while demand for server CPUs, network switches, GPUs, AI accelerators, and custom ASICs is rising simultaneously. With a limited number of factories capable of advanced packaging, lower-priority projects may be pushed onto older-generation lines and encounter capacity constraints during subsequent product ramps.

Analysis framework

The analysis uses shipment value, shipment area, and price per square meter from monthly production statistics to measure industry conditions, and combines packaging substrate manufacturers' capacity allocations, customer demand, and the difficulty of advanced packaging processes to assess the future supply-demand balance.

Methodology notes

• Industry Supply-Demand AnalysisSupply-Demand Balance Analysis

  Demand Growth and Advanced-Capacity Constraints

  By comparing growth in server- and AI-related demand, changes in product size and yields, the number of advanced production lines, and capacity consumed by new processes, the analysis assesses how long tight supply-demand conditions for high-end packaging substrates may persist.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• Japanese High-End Packaging Substrate Industry

  Direct Beneficiary

  Strengths

  Growing AI and server demand, rising unit prices, scarce advanced capacity, and high technological barriers.

  Weaknesses

  The customer base is limited, making actual supply-demand conditions difficult for external investors to observe accurately; yield pressure for large products may constrain actual output.

  Comparison

  Compared with historical supply tightness driven mainly by short-term order rushes, demand sources in the current cycle are more diversified and are jointly driven by AI and server demand as well as technological capacity constraints.

  Risks

  Demand growth below expectations, faster-than-expected yield improvements, new capacity additions, and customer inventory or product-mix adjustments.

• Ibiden [4062]

  Potential Beneficiary

  Strengths

  The report believes it has the industry's largest number of advanced production lines and may become an important supplier for advanced packaging such as EMIB-T.

  Weaknesses

  When advanced capacity is constrained, it may struggle to meet customers' sizable demand promptly; capacity allocation must be balanced among CPUs, GPUs, and new products.

  Comparison

  Relative to other industry participants, it has an advantage in the number of advanced production lines.

  Risks

  EMIB-T mass-production progress, shifts in customer demand, advanced-product yields, and execution risk in capacity expansion.

Key data

• June 2026 Packaging Substrate Shipment ValueJPY29.1 billion, up 98% YoYRigid module substrate shipment value, exceeding the previous record of JPY27.8 billion in May 2026.
• June 2026 Shipment Volume by AreaUp 20% YoYIndicates that shipment expansion was not driven by prices alone.
• June 2026 Average Price per Square MeterJPY1.429 million, up 65% YoYAbove the previous high of JPY1.356 million in May 2026.
• Duration of Tight Supply-Demand Conditions for High-End Packaging SubstratesTwo to three yearsThe report's assessment, based on demand growth, yield pressure, and limited advanced capacity.
• Expected EMIB-T Mass Production TimingSecond half of 2027Its longer process and greater manufacturing difficulty may reduce available capacity on advanced production lines.

Impact & implications

For high-end packaging substrate suppliers, higher prices and scarce capacity support improved revenue and profitability, while advanced-capacity reserves and large-substrate manufacturing capabilities will become key competitive factors. For downstream chip and server manufacturers, packaging substrates may become a bottleneck for capacity expansion and new-product launches, requiring close attention to product-priority adjustments, delivery schedules, and supply-chain security.

Risks

• AI data center, server CPU, network switch, GPU, or custom ASIC demand is below expectations.
• Yield improvements for large high-end substrates or additions of advanced capacity occur faster than expected, causing supply-demand tightness to ease earlier than anticipated.
• Changes in customer inventories or capacity-priority adjustments for CPU and GPU packaging substrates may cause short-term shipment volatility.
• Delays in mass production of new advanced-packaging products or slower-than-expected technology adoption.
• High customer concentration in the industry and limited transparency into actual order and supply-demand information.

What to watch

• Packaging substrate shipment value, shipment area, and price per square meter in Japan's monthly production statistics.
• The pace of Rubin server mass production and changes in related packaging substrate demand.
• Ibiden's capacity allocation and expansion progress for server CPU, GPU, and Rubin packaging substrates.
• EMIB-T's mass-production ramp in the second half of 2027 and its impact on advanced production-line utilization.
• Whether lower-priority projects experience capacity shortages or launch delays, to validate the degree of industry supply-demand tightness.