Micropearl product line up (Plastic Spacer) Micropearl has uniform particle size distribution with spherical particles (beads).
Base technology was cultivated with LCD spacer applications

1. Characteristics

Uniform distribution of plastic particles with unified particle size
In additional to use in automobile parts and optical components for gap control, this product can be used in a wide range of applications
Various functions can be added by various metal coatings  ▸ Micropearl AU (metal coated product)

  1. Uniform particle size distribution: Coefficient of variation (Cv) ≤ 7%, gap can be controlled uniformly
  2. Wider range of particle sizes 2 μm to 600 μm
  3. Excellent voltage, heat resistance and chemical resistance
  4. Tracking resistance test： 600V
  5. It remains stable even at -40 ～200 ℃ conditions
  6. Product maintains performance stability against many organic solvents
  7. Metal coated type, particle adhesive products are also available
    ▸ Micropearl AU (metal coated product)　▸ GAP control adhesive containing uniform particles ▸ Adhesives Product categories

2. Ｐarticles product Line up

  Micropearl
SP/GS		 Micropearl
EX		 Micropearl
KB		 Micropearl
EXH		 Micropearl
EZ		 Micropearl
SLC（under development）		 Micropearl
AU		 Micropearl
SOL
Color,
surface		 Transparent（white) Transparent（white) Black Transparent（white) Transparent（white) Transparent（white) metal coated Solder coating
Particle Size 3〜600μm 2〜5.5μｍ 4〜15μｍ 4.9〜6.9μｍ 15〜30μｍ 50〜150μｍ - -
Hardness
(5=hard～1=soft)		 3 3 3 4 2 1 3 3
Characteristics Uniform partical size distributions that are able to control uniform sizes. Excellent voltage, heat and chemical resistance Uniform partical size distributions that are able to maintain tighter particle size control. Excellent voltage, heat and chemical resistance Divinylbenzene co-polymer particles with black pigment dispersed. Excellent blackness and light shielding properties, and resistance to exudative Compared to silica particles, this particles are stable with sizes reduction and damage to the substrate. High hardness prevent settlement in the resin caused by heat It is an acrylic co-polymer particle that is very soft and it can absorb vibration and noise. Also it reduces the damage to the substrate. Due to the lower spring back (recovery rate) of the particle, it can be used for softer substrates. Silicon polymer based particle . It absorbs vibrations and noise. Lower spring back (recovery rate) of the particles, it can be used for softer substrates Available to coat evenly with diferent type of metals onto plastic particles. Our technology can control hardness of particles and repulsive force. It is a solder coating particle for semiconductor packaging which uses uniform particle size and distribution of soft plastic particles as its core. This technology achieves higher connection reliability, no under filling, narrow spacing and large package.
Simplified diagram Uniform resin particles Micropearl SP/GS Micropearl EX: Particles for high accuracy Micropearl KB: black uniform resin Particles for gap control Micropearl EXH: Hard plastic material uniformed resin particles for gap control Micropearl EZ: Low recovery rate and soft uniformed resin particles for gap control Micropearl SLC（under development） Silicone type particles Micropearl AU: Plastic core conductive particle Micropearl SOL: Polymer core solder ball
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3. Hardness Series

・Wide range of hardness is available, it is possible to choose from rigid to flexible
・Wide range of materials is available to maintain particle sizes

Micropearl SLC（under development）
Micropearl EZ
Micropearl KB
Micropearl EX
Micropearl SP/GS
Micropearl EXH
Silica particle
(General Products)

4. Wide range of particle size lineup

Wide range of sizes 　2µm〜600µm

  • particle size lineup

5. Possitive applications and effects from using the products

1Excellent  gap control for liquid types or ahesive layers

Expected effect
Ensure flatness / parallelism / suppress inclination due to curing shrinkage (improvement of reliability) / prevents optical axis deviation / evenly distributes heat radiation / stress dispersibility sensor sensitivity etc.
E.g.) Ensure flatness/ suppress inclination due to curing shrinkage (improvement of reliability) / prevents optical axis deviation / evenly distributes heat radiation / stress dispersibility sensor sensitivity etc.
  • Ensure flatness / parallelism / suppress inclination due to curing shrinkage (improvement of reliability) / prevention of optical axis deviation / uniform heat radiation / stress dispersibility sensor sensitivity etc.
  • Ensure flatness / parallelism / suppress inclination due to curing shrinkage (improvement of reliability) / prevention of optical axis deviation / uniform heat radiation / stress dispersibility sensor sensitivity etc.
  • Ensure flatness / parallelism / suppress inclination due to curing shrinkage (improvement of reliability) / prevention of optical axis deviation / uniform heat radiation / stress dispersibility sensor sensitivity etc.

2Create embossing on the surface

Expected effect
Prevent sticking to film / diffuse reflection of light / retention of film thickness.
Anti-blocking agent / anti glare film etc.
  • Anti-blocking agent / anti glare film.
  • Anti-blocking agent / anti glare film.

3Able to produce uniform holes

Expected effect
Light weight / low refraction / dielectric constant / large surface area.
E.g.) Porous material for MLCC / Inverse Opal / Catalyst Carrier / Waveguide / Low-K Material etc.
  • Porous Material for MLCC / Inverse Opal / Catalyst Carrier / Waveguide / Low-K Material etc.

4Used as a simulated specimen for equipment performance evaluation, fluid visualization and normalization

Expected effect
Measure the performance of current size/property etc
E.g.) Evaluating performance of sensor filter/ design machine / Analytical Instruments standard specimen / Clean room quality assurance / Pseudo cell etc.
  • evaluate th performance of Sensor Filter/ design machine / Analytical Instruments Standard Specimen / Clean Room Quality Assurance / Pseudo Cell
  • evaluate th performance of Sensor Filter/ design machine / Analytical Instruments Standard Specimen / Clean Room Quality Assurance / Pseudo Cell

5Able to provide particles with an adhesive layer

Application
  • Accelerometer
    Accelerometer
  • Pressure sensor
    Pressure sensor
  • Inductor，DC-DC Converter
    Inductor，DC-DC Converter
[Resin adhesive added to uniform particles] GAP control adhesive containing uniform particles Adhesives product category

6. Basic performance properties
（※The numbers are examples of measured values, not guaranteed values）

Item Test result Form Test method
Compressive fracture strength[kg/mm2] 11 Block JIS K7208 （Cylinder）
Compressive elasticity modulus [mg/mm2] 480 Block JIS K7208 （Cylinder）
Specific gravity 1.19 Plate JIS K7122
Coefficient of thermal expansion[/℃] 9.8×10-5 Plate The average temperature 20～80℃.
Thermal decomposition temp[/℃] 330 Product TGA（In the air）
Volume resistivity[Ωcm] 3.6×1014 Plate JIS K6911（500V）
Permittivity 2.9 Plate JIS K6911（1,000Hz）
Dissipation factor 0.02 Plate JIS K6911（1,000Hz）
Total light transmittance 86.00% Plate JIS K6714（2.3t）
Haze 3.50% Plate JIS K6714（2.3t）
Refractive index 1.57 Plate ASTM（Abbe Refractive index）
Volatile content 0.60% Product JIS（105℃×1H）
Chemical resistance Rate of weight change Form Weight change after the 10th dipping（20℃）
Water 0.50% Plate 2 mmt 1g DI water
NaOH -0.20% Plate 2 mmt 1g 1/10 N
IPA 1.10% Plate 2 mmt 1g 100％
N-MP 0.00% Plate 2 mmt 1g 100％
Acetone 1.00% Plate 2 mmt 1g 100％
HCl 0.40% Plate 2 mmt 1g 1/10 N
Ion content/SP   Form Analysis method
Na ≦2PPM Product Atomic Absorption Spectrometry
K ≦1PPM Product Atomic Absorption Spectrometry
Ca ≦1PPM Product Atomic Absorption Spectrometry
Fe ≦2PPM Product Atomic Absorption Spectrometry
Cl ≦1PPM Product 90℃1Hr、Extra pure water extraction Ion chromatography method
Basic performance properties - Download here