1. How does 2026's rare earth control policy affect MLCC production and supply, especially high-end models?

Rare earth control has become the most unexpected "black swan" in the 2026 MLCC industry. Unlike previous market-driven fluctuations, this policy directly hits the "performance core" of high-end MLCCs, creating a new supply constraint that no manufacturer can avoid. Many professionals are confused: why do high-end MLCCs rely on rare earths, and how will the policy affect supply and prices?

Why High-End MLCCs Depend on Rare Earths

Rare earth elements (especially medium and heavy rare earths such as thulium, yttrium, erbium, and samarium) are not optional additives for high-end MLCCs — they are the key to improving core performance⁶. For example:

• Adding thulium and yttrium oxides enhances the high-temperature resistance and voltage stability of MLCC dielectric layers, making them suitable for AI servers and new energy vehicles working in harsh environments (85℃-105℃)⁶.
• Erbium and samarium additives improve the capacitance density of ultra-miniature MLCCs (such as 01005 size), enabling high capacity under small packaging⁴.

Notably, mid-to-low-end MLCCs (used in ordinary consumer electronics) do not require rare earth additives, so they are barely affected by the policy — this further exacerbates the "high-end shortage, low-end sluggish" pattern^2,6.

Specific Impacts of the Policy in 2026

• Supply Shortage for High-End MLCCs: China supplies over 90% of the world’s medium and heavy rare earths, and the 2026 policy upgrade (purchase restrictions and bans) has cut off the raw material supply of major Japanese MLCC manufacturers. Murata, the global leader, stated that its rare earth inventory can only support 30 days of full-load production, and it has had to reduce the output of high-end AI server MLCCs by 15%⁶. This has directly led to the extension of high-end MLCC delivery cycles from 4-6 weeks to 3 months or more.
• Cost and Price Increases: The price of rare earths has soared by 25%-35% in 2026, pushing up the production cost of high-end MLCCs by 15%-20%. Leading manufacturers such as Murata and Samsung Electro-Mechanics have included this cost pressure in their price hike plans, which is an important reason for the expected 30%-40% annual increase in high-end MLCC prices^4,6.
• Opportunities for Domestic Manufacturers: Domestic MLCC manufacturers (such as Fenghua Hi-Tech and Sanhuan Group) have easier access to domestic rare earth resources, which has become a key advantage in accelerating high-end substitution. Some domestic manufacturers have even increased their market share by 3%-5% in the first quarter of 2026⁴.

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2. Why do MLCCs for AI servers frequently have reliability issues in 2026, even with high-end specifications?

In 2026, many electronics manufacturers reported a strange phenomenon: even when using high-end MLCCs (marked as "AI server-specific") from well-known brands, they still face frequent failures such as voltage ripple, insulation breakdown, and capacitance attenuation in AI server applications. This has become a major puzzle for engineers and buyers — why do high-end specifications fail to guarantee reliability?

The Root Cause: Mismatch Between Traditional MLCCs and AI Server Environments

The core problem is that most "high-end MLCCs" on the market are designed based on traditional server standards, which cannot adapt to the extreme working conditions of 2026 AI servers^3,4. Specifically, AI servers have three characteristics that exceed traditional standards:

1. Ultra-high power consumption and current density: A single AI server consumes up to 10,000 watts (5 times that of ordinary servers), requiring MLCCs to have ultra-low ESR (≤5mΩ) and ESL (≤10pH) to ensure fast transient response. Traditional high-end MLCCs (ESR ≥8mΩ) will cause severe voltage ripple, leading to chip overheating and failure.
2. Long-term high-temperature operation: The internal temperature of AI server cabinets can reach 85℃-105℃, while most traditional high-end MLCCs have a rated temperature of 85℃. Under long-term high-temperature operation, their capacitance will attenuate by 30%-50%, and the dielectric layer will age rapidly, leading to insulation failure³.
3. Frequent voltage fluctuations: AI servers have frequent high-frequency switching operations, which cause voltage fluctuations and easily trigger vacancy-driven conduction and demixing in MLCC dielectric layers — a degradation mechanism that is rarely encountered in traditional applications, leading to sudden insulation breakdown³.

Additional Factor: Hasty Mass Production

The explosive demand for AI server MLCCs in 2026 has led some manufacturers to rush into mass production without sufficient process testing. For example, some manufacturers have shortened the high-temperature aging test time from 1000 hours to 500 hours, resulting in unqualified products entering the market and further increasing the risk of reliability issues⁴.

Practical Solution

When selecting MLCCs for AI servers, avoid only focusing on "high-end" labels. Instead, prioritize three key indicators: 1) Rated temperature ≥105℃; 2) ESR ≤5mΩ, ESL ≤10pH; 3) Passed HALT (Highly Accelerated Life Test) and TSDC (Thermally Stimulated Depolarization Current) tests. Brands such as Murata’s AI-specific MLCC series and Fenghua Hi-Tech’s high-capacity low-ESR series are more suitable for 2026 AI server applications.

3. What are the hidden risks of applying 01005-size ultra-miniature MLCCs (0.4x0.2mm) in 2026's new AI terminals?

With the rise of miniaturized AI terminals (lightweight smart glasses, AI phones, portable AI hosts), the 01005-size (0.4x0.2mm) ultra-miniature MLCC has become a "must-have" component in 2026 — a single smart glass requires 150-200 pieces of 01005 MLCCs². However, many manufacturers have encountered unexpected problems during application, and the hidden risks of this new size have become a major puzzle in the industry.

Three Easily Overlooked Hidden Risks

• Soldering Reliability Issues: The 01005 size is only 1/4 of the traditional 0201 size, making soldering extremely difficult. Traditional reflow soldering is prone to tombstoning (the MLCC stands up like a tombstone), bridging (solder short-circuit between pads), and poor solder wetting. Some small and medium-sized manufacturers have a soldering yield rate of less than 85%, which significantly increases production costs⁴.
• Weak Mechanical Stability: The ultra-small size leads to extremely weak structural strength of the 01005 MLCC. Even slight vibration (such as the shaking of portable AI devices) or PCB thermal expansion (during operation) can cause the MLCC to fall off or crack. A survey by an electronic manufacturing service (EMS) company shows that 12% of AI terminal failures in Q1 2026 are caused by 01005 MLCC detachment.
• High-Frequency Parameter Drift: 01005 MLCCs are mainly used in high-frequency scenarios (500MHz-20GHz) such as RF modules of AI terminals. However, their self-resonant frequency (SRF) is extremely sensitive to PCB layout — even a 0.1mm deviation in pad spacing can cause SRF to shift by 10%-15%, leading to capacitance attenuation and signal interference, which affects the performance of AI terminals⁵.

How to Avoid These Risks

To reduce application risks, take three key measures: 1) Use low-temperature solder paste (melting point 138℃) and optimize reflow soldering parameters (slow heating and cooling) to improve soldering yield; 2) Optimize PCB layout, increase pad size appropriately (from 0.3x0.15mm to 0.35x0.2mm) and reduce pad spacing to enhance mechanical stability; 3) Select 01005 MLCCs from manufacturers with mature technology (such as Yageo’s CQ series and Murata’s GRM series), which have better process consistency and parameter stability.

4. Why are mid-to-low-end MLCC manufacturers facing greater cost pressure in 2026 despite stable product prices?

2026’s mid-to-low-end MLCC market is full of contradictions: on the one hand, product prices are basically flat or only slightly rising (5%-10%), and on the other hand, many mid-to-low-end manufacturers have reported losses, and some even plan to reduce production. This "cost-increase without price-transmission" dilemma has become a major puzzle for industry insiders — where does the cost pressure come from?

Three Core Sources of Cost Pressure

1. Rising Raw Material Costs: Although mid-to-low-end MLCCs do not use rare earths, their core raw materials have seen significant price increases in 2026. Nickel paste (accounting for 9% of total costs) has risen by 15%-20% year-on-year, and silver paste, tin plating, and other auxiliary materials have also increased by 10%-15%⁴. Overall, the raw material cost of mid-to-low-end MLCCs has increased by 12%-18% in 2026.
2. Low Capacity Utilization: The traditional consumer electronics market (mobile phones, laptops) is still sluggish in 2026, leading to weak demand for mid-to-low-end MLCCs. The capacity utilization rate of mid-to-low-end manufacturers is only 60%-70%, which means that fixed costs (equipment depreciation, labor, factory rent) are spread over fewer products, increasing the unit cost by 8%-12%^2,4.
3. Supply Chain Squeeze: Major manufacturers (Murata, Samsung Electro-Mechanics, Yageo) have shifted their production capacity from low-margin mid-to-low-end products to high-margin high-end products. This has led to a reduction in the supply of mid-to-low-end production equipment, auxiliary materials, and technical services, and the cost of production supporting services has increased by 10%-15%^1,6.

Implications for Buyers

The cost pressure of mid-to-low-end manufacturers will eventually be transmitted to the market. It is expected that mid-to-low-end MLCC prices will face hidden hikes (10%-15%) in the second half of 2026. For buyers (such as consumer electronics manufacturers), it is recommended to lock in long-term supply contracts with reliable manufacturers in advance to avoid cost risks.

5. Why can't mid-to-low-end MLCC production lines be directly converted to high-end ones in 2026, and what are the key technical barriers?

With high-end MLCCs in short supply and prices soaring (expected to rise by 30%-40% in 2026), a common question in the industry is: why don’t mid-to-low-end manufacturers convert their production lines to high-end ones to seize the market opportunity? The answer lies in four insurmountable technical barriers that most people ignore — mid-to-low-end production lines are not "upgradable" to high-end ones, but require a complete overhaul.

Four Key Technical Barriers

• Equipment Barriers: High-end MLCC production requires high-precision CNC special equipment, such as ultra-thin dielectric layer coating machines (coating thickness ≤2μm) and high-precision lamination machines (lamination accuracy ≤0.1μm). Some of these cutting-edge equipments are subject to export restrictions, making it difficult for mainland and Taiwanese mid-to-low-end manufacturers to obtain. The cost of a single high-end production line is 3-5 times that of a mid-to-low-end line (up to 500 million yuan), which is beyond the capacity of most mid-to-low-end manufacturers^4,6.
• Material Barriers: High-end MLCCs require high-purity raw materials that mid-to-low-end manufacturers cannot easily obtain. For example, 99.99% purity calcium carbonate (mid-to-low-end only requires 99.5%) and nickel powder below 100 nanometers (mid-to-low-end uses 200-300 nanometers). These high-purity materials have high costs and limited suppliers, further raising the threshold⁴.
• Process and Yield Barriers: The production process of high-end MLCCs is 3-4 times more complex than that of mid-to-low-end products, involving ultra-thin dielectric layer preparation, high-precision lamination, and high-temperature sintering. The yield control is extremely difficult — overseas leading manufacturers (Murata, Samsung) have a yield rate of 93%-95%, while domestic mid-to-low-end manufacturers have a yield rate of less than 80% even after attempting to upgrade. Low yield directly leads to high unit costs and uncompetitive prices⁴.
• Formula Barriers: High-end MLCCs need to add specific rare earth oxides and additives to improve performance, and these formulas are core trade secrets of leading manufacturers. For example, the formula for low-ESR AI server MLCCs involves the ratio of rare earth oxides and ceramic powder, which takes years of R&D and testing to optimize. Mid-to-low-end manufacturers lack the R&D capabilities and experience to replicate these formulas⁶.

Why Conversion Is Not Worthwhile Even If Possible

Even if mid-to-low-end manufacturers overcome the above barriers, the conversion cycle is 12-18 months (equipment procurement, process debugging, yield ramp-up), which is far longer than the 2026 high-end MLCC shortage cycle. By the time the converted production line is put into production, the market supply may have stabilized, and the investment return cannot be guaranteed. This is why most mid-to-low-end manufacturers choose to maintain their existing production lines rather than attempt conversion.