Analysis of trace metal elements in liquid crystals

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We will introduce a case where ICP measurement was conducted using panels before and after reliability testing, along with quantification. The liquid crystal molecules in an LCD are oriented within the panel, and the display is controlled by changes in the orientation state of the liquid crystal due to voltage. When ionic substances, such as metal elements, are present inside the panel, the liquid crystal may not drive correctly, leading to display defects. It is known that ionic substances can increase due to contamination during manufacturing or long-term use, making it important to quantify and understand them as part of panel quality. Metal ions can be quantitatively analyzed using ICP analysis, and depending on the differences in pretreatment methods and detection sensitivity, ICP-AES and ICP-MS are used selectively. [Analysis Content] ■ Comparison of metal element content using ICP-AES analysis ■ Comparison of metal element content using ICP-MS analysis For more details, please refer to the related products and catalog below.

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Analysis of trace metal elements in liquid crystals
Depending on the panel size, it is possible to analyze using different ICP-AES/MS devices!

For more details, please refer to the PDF document or feel free to contact us.
Total solution for the reliability of liquid crystal displays.
We provide comprehensive support for customers facing reliability issues with overseas manufactured LCD displays, from reliability testing to failure analysis and material analysis.

■Reliability Testing of LCD Products Extensive testing menu Visual inspection before and after testing Reducing the burden on customers ■Failure Analysis of LCD Products Unique correlation of failure modes, related areas, analysis targets, and main methods Achieving rapid and accurate analysis
[Information] Liquid Crystal Materials and Their Analytical Techniques
Easily explain the technical capabilities of Aites by analyzing molecular structures with diagrams and tables!

【Other Published Content】 ■ Explanation of LCP Molecular Structure (Example) ■ GC-MS Equipment Owned by Ites ■ Low Molecular Weight Liquid Crystals ■ Explanation of Low Molecular Weight Liquid Crystal Structure (Example) ■ TIC Data of Low Molecular Weight Liquid Crystals (for LCD) and Detected Substances from GC-MS Analysis ■ Explanation of Liquid Crystal Structural Functions *For more details, please refer to the PDF document or feel free to contact us.
GCMS analysis of liquid crystal components
Comparison of components in liquid crystal panels using gas chromatography-mass spectrometry (GC-MS) is published!

For more details, please refer to the PDF document or feel free to contact us.
Analysis of good LCD panels
Check the quality status of LCD components and products! We will analyze the structures of the LCD panels using our analytical methods and expertise!

【Analysis Content (Excerpt)】 <Optical Observation> ■Classification ・Panel LCM/Cell ・Optical observation after cell disassembly ■Evaluation Items ・COG bonding/FOG bonding ・SEG-LCD_PIN bonding ・Lead wiring/peripheral circuits ・Cell seal ・Display section ・TFT/CF structure ■Analysis Method ・OM observation *For more details, please refer to the PDF document or feel free to contact us.
Defective analysis of liquid crystal panels
We will narrow down the defective areas through lighting confirmation, panel disassembly, and optical microscope observation!

【Target Panels】 ■Segment LCD ■Passive LCD ■Active TFT LCD (automotive, mobile, TV, etc.) 【Items to Prepare】 ■Defective panel ■Lighting fixture (panel display defect photos are also acceptable) ■Reference panel (if available) *For more details, please refer to the PDF document or feel free to contact us.
[Data] ICP Emission Spectroscopy Analysis (ICP-AES)
We will detect and analyze the atomic emission that occurs when an atom returns from an excited state to its ground state!

For more details, please refer to the PDF document or feel free to contact us.
[Data] Analysis of SEG-LCD Panel Display Malfunction
We introduce case studies of comparative analysis conducted through chemical analysis, such as GC-MS analysis and ICP-AES analysis!

For more details, please refer to the PDF document or feel free to contact us.
Evaluation of TFT characteristics of liquid crystal panels
We can perform good product characteristic measurements for performance verification, as well as defective characteristic measurements and reliability evaluations!

【Other Features】 <DC Bias Stress Test> ■ Apply an arbitrary DC bias to the Gate and Drain, measure the Vth shift when stress is applied to the TFT, and confirm reliability. ■ Can be measured even in a heated state as an accelerated test. ■ By conducting measurements with multiple panel manufacturers and comparing the Vth shift amounts, superiority judgments can also be made. *For more details, please refer to the PDF document or feel free to contact us.
Liquid Crystal Material Analysis
Rich equipment and expertise! We will elucidate the molecular structures of materials in general through chemical instrument analysis!

【Equipment Used】 ■FT-IR Device ■XPS (ESCA) Device ■GC-MS Device *For more details, please refer to the PDF document or feel free to contact us.
Analysis of Liquid Crystal Display Materials
We propose analytical methods tailored to materials and purposes! Here are examples of chemical analysis for each component, such as liquid crystals and sealing materials.

【Other Examples of Chemical Analysis (Partial)】 < Liquid Crystals > ■ GCMS: Analysis of Liquid Crystal Components ■ ICP-AES: Analysis of Metal Elements in Liquid Crystals ■ Results - Liquid crystal components containing cyano groups were used, and metal elements were detected in the liquid crystal. - The polarization of the cyano group may interact with metals and affect liquid crystal driving. < Polarizers > ■ HS-GCMS: Outgassing Analysis (Degradation Analysis) ■ Results - In samples subjected to constant temperature and humidity tests, hydrolysis of cellulose acetate due to the degradation of the polarizer was confirmed. - Hydrolysis of the polarizer is one of the causes of panel display defects. *For more details, please refer to the PDF document or feel free to contact us.