Discover ATOMETRICS' One-Click Dimension Measuring Instrument: Achieving Fast and Accurate MLCC Dimension Detection at NEPCON China 2025

MLCC Overview and Quick Measurement Solution

I. MLCC Overview

MLCC (Multi-layer Ceramic Capacitors) is a commonly used type of ceramic capacitor in the electronics industry.

It is made by printing inner electrode slurry onto multiple layers of ceramic dielectric sheets, which are then stacked and sintered at high temperature to form a ceramic chip. Metal layers (external electrodes) are sealed at both ends of the chip.

II. Importance of MLCC Dimensions

The dimensions of MLCCs are usually represented by a four-digit code, where the first two digits represent the length, and the last two digits represent the width. For example, an "0805" MLCC indicates a length of 0.08 inches and a width of 0.05 inches.

MLCC dimensions not only determine the physical space occupied by the capacitor but also affect its electrical performance and reliability.
- Capacitance: Under the same material and voltage rating, larger sizes typically provide higher capacitance values.
- Self-resonant frequency: Larger MLCCs may have lower self-resonant frequencies, which is a key consideration in high-frequency applications.
- Voltage resistance: Larger MLCCs can withstand higher voltages.
- Reliability and durability: Larger sizes allow for more space to design complex internal structures, which can enhance reliability and durability.
- Mounting and layout: Smaller MLCCs are suitable for high-density circuit board designs.
- Temperature characteristics: Larger MLCCs may exhibit better temperature stability due to the larger amount of material available to dissipate heat.
Size control of MLCCs is critical to ensuring product quality, performance, and reliability.

MLCC external dimensions (length L, width W, height H) need precise measurement to meet nominal sizes and design requirements.
Electrode sizes (A/B) influence the soldering performance and electrical connection with the PCB.

III. MLCC Size Measurement Solution

Ensuring the dimensional consistency of MLCCs is crucial to product reliability and compatibility during the automated assembly process. If the dimensions are incorrect, issues such as material jams may occur, which would severely hinder the subsequent automated SMT mounting.

End thickness & profile angle R: The thickness (D) of the MLCC's end and profile angle (R) impact its mechanical strength and stability after installation.

To ensure dimensional consistency, manufacturers must conduct bulk dimension testing of MLCCs.

ATOMETRICS FM9000 Series Instant Measurement Tool: This tool can quickly measure the geometric dimensions of MLCCs and determine whether they are OK/NG, improving product yield.

Multiple products can be measured simultaneously and quickly, automatically determining OK/NG.

It captures images only of the areas where MLCCs are located and measures only those regions.
The platform intelligently selects optimal paths, automatically searches, and switches lenses to measure at high speed.

Due to the significant impact of MLCC dimensions on product quality, the quality control process is essential. Many manufacturers face challenges such as difficulty in hiring quality control staff, large measurement result discrepancies among different workers, and lengthy measurement times.

ATOMETRICS FM-9000 Series One-click Instant Measurement Tool: This solution allows for quick, accurate, and bulk measurements with just placement, addressing MLCC geometric measurement challenges and helping improve product yield and output!

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